(UNTITLED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-06505A000700060022-0
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 32
• Document Creation Date: November 17, 2016
• Document Release Date: May 25, 2000
• Sequence Number: 22
• Publication Date: December 5, 1966
• Content Type: CABLE

25X1A
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2000/06/14 : CIA-RDP78-06505A000700060022-0
Installation GEH-1663
Some installation requirements may necessitate
inversion of the standard mounting brackets, which
will increase the clearance where necessary.
The weld-nuts on tank are spaced so as to accept
EEI-NEMA bracket.
LIGHTNING ARRESTER CLEARANCES
REGULATOR VOLTAGE
CLASS (KV-RMS)
MINIMUM SUGGESTED
CLEARANCE (INCHES)
2.5
4
5.0
5
7.62
6
13.8
6
14.4
91/2
20
9V2
If the arresters are not mounted on the regulator,
they should be installed within 10 feet of the regulator
and the ground of the arrester should be connected
directly to the ground lug of the regulator tank.
SHORT-CIRCUIT RATING
The impedance of a regulator is practically neg
ligible for reducing short-circuit current. The imped-
ance of the feeder up to the point at which the regu-
lator is installed should be sufficient to limit the
short-circuit current in the regulator to the value
for which it is designed. It is recommended that
feeder current-limiting reactors be installed on the
feeder to keep the short-circuit current within the
required limits.
Short-circuit rating on any position is 40 times the
rated current at ?-10 percent regulation for 0.8 sec-
onds. For short-circuit duration above 0.8 seconds
the permissible short-circuit current is reduced to keep
the product 12t constant. In this formula 1 is the short-
circuit current and t is the time in seconds. For in-
stance, if the regulator is rated 2500 volts, 400 amperes,
at -1-10 percent regulation, 12t- (400 x 40) 2 x 0.8
205 x 106. Then for a short-circuit duration of 2 sec-
onds, 212- 205 x 106 and 1_10,100 amperes.
NOTES:
I. The three by-pass cutouts are mounted on the
I I side of the crossarm toward the installation for
clarity of illustration. Mount these by-pass
cutouts on the opposite side of the crossarm
with the same line connections as shown.
2. Tie lightning arrester grounds together and
connect to tank ground lug.
Typical three-phase installation
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Approved For Releas 00/06/14 : CIA-RDP78-06505A00070.110022-0
GEH-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
CONNECTION DIAGRAMS
If ere is any doubt that the regulator is on the neutral position, follow the instructions below, or check the position or
e reversing switch by removing the handhofe cover. When the regluator is in the neutral position the movable contact of the
reversing switch is in a vertical position. CAUTION: Make this inspection only when the regulator is de-energized.
1
WARNING: Po not use any automatic circuit-opening elements between the line an L bashing, such as: fuses, cutouts or circuit
breakers. This connection sh9051:neyerhe opened unless the regulator is in the neutral position. When the connection to the SL
bushing is open, the regulator acts as a current. transformer with open-circuited setae-dory. Dangerous voltages are induced in
e series and exciting windings if any load current flows in the series winding.
ONNECTING INTO SERVICE:
. Open the control circuit.
Clop device 01(aad p if used).
Close the control circuit and run the regulator to neutral
y manual control; then reopen the control ch:cuit:
I. toin device C.-
Open device A. - -
Close control ;circuit and place control on AUTO.
REMOVINd FR ERVICE:
Set the 'regulaatlr on neutral by Manual control, then open
.heco.nJrolcfrjjit ..
!
2. Close line at A._
3. Open B and C (and D if used).
CAUTION: TO AVOID BURNOUT OF WINDINGS, DEVICE
"A" MUST NEVER BE CLOSED WITH THE REGULATOR CON-
NECTED TO THE LINE EXCEPT WHEN IN THE NEUTRAL
TNIN
EST
(UEI
E a is NOT
UNDO)
LIGHTNING
ARRESTER
LOAD
2
3
LIGHTNING
ARRESTERS
LIGHTNING
ARRESTER
? (USED IF N
IS NOT GROUNDED)
GIROVNEI
LUG
8
NO.2 NO.3
A, a, c (and D if used) are disconnects suitable for me current.
Fig. 3. Connecting regulator in and removing from service without interrupting load
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Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
,vorm GEH-i 663
cONNECTION DIAGRAMS (CONT'D)
CONNECTIONS
VOLTS POSITION SWITCH CONNECTS
PERCENT NUMBER M TO A TO 8TO
10 16 ca C C
5 0 C
4L D D
3 L E D H
2 E
I
9 3/8
8 3/4
a 1/8
7 1/2
6 7/8
1,-1 61/4
v) 5 5/8
-5
.at 4 3/8 7
3 3/4 6
31/8 5
2 I/ 2 4
17/8 3
I 1/4 2 -1
5/8 1
NEUTRAL 0 OPEN
5/8
1 1/4 2
1 7/8 3
-2-1/2
31/8 5
m -3-1/4 6
43/8 7
LU 5 8
? 55/8 9
61/4 0
o 6 '7/8 1
-1 7 1/2 12
81/8 3
83/4 14
3/8
IS
10 6
Fig. 4. Switching mechanism connections
SOURCE
NEUTRAL
WIRE BRACKET
LIGHTNING
ARRESTER
SUSPENSION
INSULATORS
WIRE
HOLDER
LIGHTNING
ARRESTER
WIRE HOLDER
DISCONNECTING
FUSE CUTOUTS C
TO GROUND ?
DISCONNECTING
FUSE CUTOUTS B
BY
CUTOUT A
/NORMALLY 1
\ OPEN
gEr1--
GROUNDING LUG
GROUND
MOLDING
LOAD
NOTES
I. If line "2" is at ground potential,
connect line "21 lightning
arresters, bushing (52L2), end
regulator lank to the ground
conductor on the polo. These
connections are shown in the
2. If line "2" is not of ground
potential, cut on additional
lightning arrester on line "2"
and connect bushing (S2L2)
to hoe '2"
Fig. 5. Typical single-phase installation
2 REGULATORS, 3-PHASE, 3-WIRE CIRCUIT
3 REGULATORS, 3-PHASE, 3-WIRE CIRCUIT
1> 1
I
-11.1
2
Eli
-.2
2> ? MI 2
3>
3
SOURCE
II
->3
LOAD
3
SOURCE
I
AD
LOAD
ii1
?
?
PHASE
ROTATION
REG
NO.
PHASE
?

ii, ?
PHASE
PHASE
ROTATION
PHASE
L
1
LAG
4111)
0 4)
I- 2-3
LEAD
S SL
1- 2 - 3
2
LEAD
I
LEAD
-,o'
REG. l'`I REG. '#`2 REG. 3
3 -2 -I
LAG
REG. #.1 REG. 0,2
3 - 2 - I
2
LAG
(I) REGULATOR TO REGULATE I PHASE OF A
3-WIRE, 3-PHASE CIRCUIT
?tri
3 REGULATORS, 3-PHASE, 4-WIRE CIRCUIT
N?-
N
I> I
2> a
i
2
3>-
2
3
?'.2
SOURCE
T
I d
0 ell
01
3
11 LOAD
SOURCE
?0.3
LOAD
PHASE
ROTATION
PHASE
1-2-3
LEAD
3-2-I
LAG
( I ) REGULATOR, SINGLE- PHASE CIRCUIT
Fig. 6. Feeder connections
9
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Releas01900/06/14 : CIA-RDP78-06505A0007001110022-0
GEH-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
OPERATION
LOAD-BONUS OPERATION
The load-bonus feature provides a means of operat-
ing the regulator at increased load by decreasing
the range of regulation in 11A percent steps. Load
current may be increased up to 160 percent of rated
current when operated at ? 5 percent regulation
(with a limit of 668 amperes). Refer to nameplate for
rating at load-bonus settings.
To make adjustments, set the limit switches to the
desired regulation range by lifting the knob and mov-
ing it to the desired setting (Fig. 7).
THE REGULATOR NEED NOT BE DE-ENERGIZED WHEN
MAKING REGULATION ADJUSTMENTS.
DRAG HAND RESET
To reset the drag hands on the load-bonus posi-
tion indicator, press the drag hand reset button on
the lower left corner of the control panel. Drag hands
will reset automatically.
I. Limit switch adjusting knob (lower)
2. Limit switch adjusting knob (raise)
Fig. 7. Load-bonus position indicator
THREE-PHASE CONNECTIONS
The line connections for three-phase operation are
shown in Fig. 6.
Note that Type ML32 regulators cannot be oper-
ated in Y-connection with the bank-neutral isolated.
When these regulators are Y-connected, the neutral of
the regulator bank must be effectively connected to
the system neutral, preferably by the fourth wire.
Without this interconnection, Y-connection is hazard-
ous, as the individual and independent voltage control
of each phase can cause unequal turn ratios between
phases, resulting in shifting of an isolated neutral with
extreme distortion of phase voltages.
10
OVERLOADING REGULATORS
The regulator may be overloaded in accordance
with the American Standard Guide for Loading Step
Voltage Regulators, Appendix C57.95-1955.
OTHER THAN RATED VOLTAGE
All regulators, except those of the 2500-volt rating,
are provided with taps on the potential transformer
for reduced-voltage operation. These taps make it
possible to obtain the proper voltage for the control
circuit. When operated at other than rated voltage,
the regulator KVA must be reduced unless otherwise
specified on the nameplate.
With the exception of certain operating voltages for
7620-volt regulators, all ratios of potential trans-
formers may be changed by changing the connection
of lead No. 9 at terminal board located on the con-
trol panel. Other connections are to be changed inside
the regulator tank. For proper connections, see regu-
lator nameplate.
The following table lists the standard potential
ratios.
RATED
VOLT-
AGES
OPERATING
VOLTAGES
POTEN-
TIAL
RATIOS
VOLTAGE LEVELS
OF VOLTAGE
SENSOR
2500
2500
20:1
125
5000
40:1
125
5000
4330
34.7:1
125
2500
20:1
125
7960
66.7:1
119.3
7620
66.7:1
114.2
7200
60:1
120
7620
6900
60:1
115
5000*
40:1
125
4330*
34.8:1
124.4
2500*
20:1
125
13800
13800
120:1
115
12000
100:1
120
14400
24940GR.Y
120:1
120
12470GR.Y
60:1
120
19920
34500
166:1
120
* Connection fo these operating voltages must be made inside the tank.
When it becomes necessary to change potential
transformer connections inside the tank to obtain the
correct potential ratio, remove the cover and lower the
oil just enough to expose the potential transformer
terminal board. (Be careful not to expose the current
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Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
=me
Checking Regulator Controls
GEN-1663
transformer or bridging reactor to the air.) Remove
insulation from the existing connection, and discon-
nect this joint. Cut the cloth tape and remove the
paper insulation from the potential lead to be used in
making the new connection. (The terminal board is
clearly stamped to identify the potential leads.)
Make the desired connection, and re-insulate this
joint. Tape the disconnected potential lead.
TEST FOR PHASE SEQUENCE
If the system phase sequence is not known, use
the following method of obtaining the proper phase
relationship.
The regulators carrying the leading and lagging
current can be identified as outlined below. This
method may be used only for two regulators in an
open-delta system and should be made when the regu-
lators are carrying appreciable load.
a. Connect the regulators for normal open-delta
operation. See Fig. 6.
b. Set the control switch on "AUTO."
c. Set the resistance (R) and reactance (X) adjust-
ments on the line-drop compensators of both units on
zero.
d. Set the voltage sensor on each unit at approxi-
mately 120 volts.
e. Set X on each regulator to 10 volts, leaving R on
zero. Measure the output voltages of each regulator.
f. The regulator with the higher output voltage
(nearer the maximum raise position as observed on
the position indicator) is on the lagging phase; the
other is on the leading phase.
CHECKING REGULATOR CONTROLS
With by-pass switch "A," Fig. 3, in series with the
line closed, close the disconnect switch "B" (and "D"
if used) on the source side of the regulator. Do NOT
close the disconnect switch "C" on the load side.
Close the control-power circuit breaker.
Set the line-drop compensator to zero compensation.
Turn the selector switch to LOWER. The regulator
will make the number of steps in the LOWER direc-
tion depending upon the setting of the limit switch in
the indicator; then the motor will be stopped by the
opening of the "lower" limit switch.
Turn the selector switch to AUTO. After a time
delay (as determined by the setting of the time-delay
relay), the regulator will operate and come to rest.
Check the operation of the regulator in the RAISE
direction in the same manner.
If desired, connect a precision voltmeter to the test
studs on the front of the control panel. The reading
should be within the bandwidth of the voltage setting
of the voltage sensor.
If the setting of the voltage-sensor is satisfactory,
return the regulator to NEUTRAL; then set the
selector switch and the control-power circuit breaker
on OFF. If unsatisfactory, adjust the voltage sensor
as explained under OPERATION OF THE STATIC
CONTROL.
tANCE
RINE DROP COMPENSATION IVOL551
NO EOGV INDICATOR
GENERAL
ELECTRIC
STEP VOLTAGE REGULATOR CONTROL
cothreet
POWER
'717,
1. Voltage level adjustment
2. Bandwidth adjustment
3. Resistance compensator
4. Test rheostat
5. High and low lights
6. Reset switch
7. Operation counter
8. Time delay adjustment
9
I0
12
13
14
15
16
9. Reactance compensator
10. Polarity switch
11. Control switch
12. Neutral light
13. Output test terminals
14. Control power circuit breaker
15. External power supply switch
16. External power supply terminals
Fig. 8. Control panel, front view
11
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Approved For Release"0/06/14 : CIA-RDP78-06505A000700014022-0
GEH-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type M132
OPERATION OF THE STATIC CONTROL
INTRODUCTION
The control described below incorporates the
standard features of voltage-sensing, time delay
and line-drop compensation common to all controls
for step voltage regulators. All functions except the
final output to the motor circuit are performed with
static devices in order to minimize the effects of wear
over an extended service life.
The controls are designed for 60-cycle alternating-
current operation. All devices are factory calibrated
and adjustments can be made by the calibrated
control knobs. No warm-up time is required by the
controls and the accuracy class is better than Class I.
The control settings can be secured by the locking
knobs.
OPERATION
The regulator output voltage is stepped down by an
internal potential transformer and is applied to the
input of the control. A test rheostat (R24) is provided
to permit variation of the voltage applied to the
sensing circuit of the control with no change in the
regulator output voltage. This facilitates checking
of controls at installation.
A tapped transformer (Ti) is used to reduce the
voltage applied to the line-drop compensator and
sensing circuit to a desired level. A rheostat (R29)
provides for voltage level settings between 105 and
135 volts.
Before being applied to the sensing circuit, the
output of transformer (Ti) is modified by the line-
drop compensator. The line-drop compensator con-
sists of a tapped reactor (L1) and a rheostat (R27)
which are used to develop voltages proportional to
the IX and IR drops in the line fed by the regulator.
The reactor simulates the IX drop and has taps
selected to permit the insertion of 0 to 24 volts com-
pensation in one-volt steps with rated current flowing
in the regulator. The resistance compensation is
continuously adjustable from 0 to 24 volts at rated
output current. A compensation polarity selector
switch (Si) is provided to permit the reversal of
either the resistance or the reactance compensation
when required by regulator application. For normal
compensation applications, the voltage developed
across the line-drop compensator is subtracted from
the regulator output voltage. This forces the regulator
output to be higher for a given voltage into the sensing
circuit and thus causes the regulator to compensate
for the drops created by current flow in the lines.
12
The voltage-sensing element of the control is a
zener diode bridge. The legs of the bridge consist of
R6; CR21, CR22, Z1 and R12; CR19, CR20 and Z2;
R28, R8, R7 and R15. Resistors R12 and R15 are
relatively small and may be ignored in a general
analysis of bridge operation. Diodes CR19, CR20,
CR21 and CR22 are used for temperature compensa-
tion and may also be ignored for general analysis.
This leaves the basic elements of the bridge being
R6, Z1, Z2, R28, R8 and R7. The zener diodes serve
as reference devices and voltage variations are re-
flected as differences in voltage across the resistors.
Since zener diodes are DC devices, it is necessary to
rectify and filter the regulator output before applying
it to the sensing bridge. For this application, the
bridge is at its balanced condition when the potential
at the junction of R6 and CR21 is equal to the poten-
tial at the center of the active portion of R8. As the
applied voltage increases, the potential at the center
of R8 rises with respect to the potential at the junc-
tion of R6 and CR21. As it decreases the reverse
occurs.
The output of the voltage-sensing bridge is fed to
the control windings of a pair of magnetic amplifiers
(AMP1 and AMP2). At balance, current flow in the
control windings of AMP1 is from R9 to L3 and
current flow in the control windings of AMP2 from
L3 to R10. Current flow in this direction causes each
amplifier to produce negative pulses to the gate
circuit of SCR1. Since positive gat voltage is re-
quired to make an SCR conduct, there will be no
output from the control. As previously described,
when the applied voltage increases the potential
at the center of R8 rises with respect :to the potential
at the junction of R6 and CR21. When the increase
is sufficient to cause the potential at the lower slider
of R28 to go above the potential at the junction
of R6 and CR21, the current in the control winding
of AMP2 will reverse. This current reversal will
cause AMP2 to produce positive pulses to the gate
circuit of SCR1 and make it conduct. It may be
seen that the rectifiers CR9 and CR1.0 in the circuit
of AMP2 will force it to function on the half cycle
of the a-c wave when the bottom of transformer T2
is positive with respect to the top. Therefore, positive
pulses from AMP2 cause SCR1 to conduct on the
half cycle which applies voltage to the lower portion
of the circuit and charges capacitor C4. This potential
is applied through CR14 to the time delay circuit
which consists basically of a uni-j unction transistor
(UJT1) and an RC charging network (R25 and C5).
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Approved For Release 2000/06/14: CIA-RDP78-06505A0007,29060022-0
Operation of the Static Control
GEH-1663
When C5 has charged sufficiently to cause UJT1 to
conduct, the pulse created by this conduction is
applied to the gate circuit of SCR2 causing it to
conduct. Conduction of SCR2 energizes relay K2
which, in turn, energizes the regulator operating
motor in the direction which will lower the output
voltage.
A similar sequence may be followed through when
the applied voltage decreases. In this case, the current
through the control windings of AMP1 reverses when
the potential at the upper slider of R28 falls below
the potential at the junction of R6 and CR21. Note
that the setting of R28 determines the amount of
deviation from balance required to initiate a con-
trolling action. Therefore, R28 is the bandwidth
adjustment. See Section on "Checking The Level
and Bandwidth."
Since AMP1 functions when the top of T2 is
positive with respect to the bottom, SCR1 is caused
to conduct on the half cycle which energizes the
upper portion of the circuit. The same timing circuit
is energized, but this time through rectifier CR13.
Under these conditions, when SCR2 conducts, it will
energize relay K1 which will in turn operate the
drive motor to raise the output voltage. Note that
variable resistor R25 changes the time constant of the
RC charging network and is therefore the time-delay
adjustment element. Since a single timing network
is used, a single adjustment provides for equal time
delay for errors in either direction.
If the voltage-sensing device returns to a balanced
condition before capacitor C5 is fully charged or time
cycle is completed, the capacitor will discharge
through the same path as the charging network.
In order to facilitate checking the control, a pair
of indicator lights is provided to show when the edge
of the band has been reached. To keep from unduly
loading the circuit during normal operation and to
extend lamp life, the circuit is arranged such that the
lamps are operative only when the control selector
switch is in the TEST position. This position may be
used to check voltage level and bandwidth but due
to circuit loading by the lamps it is necessary to put
the control selector in the AUTOMATIC position to
check time delay, and for normal operation.
.1- AGE SENSOR
GENERAL
The voltage-sensing device continuously measures
the output voltage of the regulator and controls the
operation of the motor of the tap changer, thereby
maintaining the output voltage within a preset band.
VOLTAGE LEVEL
To adjust the voltage level of the control, rotate
the adjusting knob marked VOLTAGE LEVEL.
The voltage level is continuously adjustable between
105 and 135 volts, with scale markings in one-volt
increments.
The sensor is set at the factory for 120 volts with
1.5-volts bandwidth.
BANDWIDTH
To adjust the bandwidth of the control, rotate the
adjusting knob marked "Bandwidth." The band-
width dial is calibrated for 1.5, 2.0, 2.5 and 3.0 volts
at normal voltage levels between 110 and 130 volts.
'rhe desired bandwidth is obtained by the intersection
of the voltage level line and bandwidth line.
NORMAL VOLTAGE
The normal voltage setting of the voltage sensor
should be checked first. Normal voltage is the median
of the voltage at the point between when the HIGH
and LOW band edge indicator lights just go on.
To adjust, check the normal voltage level, connect
an indicating voltmeter to the potential test ter-
minals on the control panel and set the line-drop
compensator for zero compensation. The indicating
voltmeter will then read the equivalent output voltage
of the regulator.
CHECKING THE LEVEL AND
BANDWIDTH
With the indicating voltmeter connected to the
potential test terminals, proceed as follows:
1. Set the VOLTAGE LEVEL adjusting knob.
2. By means of the automatic-manual control
switch, operate the regulator either RAISE
or LOWER until the voltmeter reads approxi-
mately 2 volts above the upper edge of the
desired regulator bandwidth.
3. Turn the CONTROL SWITCH to TEST. At
this point the HIGH light should be lit signifying
that the voltage is above the upper edge of the
bandwidth.
4. Turn the TEST RHEOSTAT in until neither
light is lit. Continue turning in the TEST
RHEOSTAT until the LOW light is lit and
record the voltage at which the light comes on.
This is the lower edge of the bandwidth.
5. Turn the TEST RHEOSTAT in the opposite
direction until the HIGH light is lit and record
the voltage at which this light comes on. This
is the upper edge of the bandwidth.
'3
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Approved For Release AND/06/14 : CIA-RDP78-06505A0007000")22-0
GEN-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type A011.32
6. The median of these two voltage recordings is
the true normal voltage setting of the control.
Should this actual setting be slightly different
than required, slightly adjust the VOLTAGE
LEVEL control knob accordingly and repeat
the above steps. Bandwidth is the interval be-
tween when the HIGH and LOW just go on.
7. Return the TEST RHEOSTAT and CONTROL
SWITCH to AUTO position and reset the
line-drop compensator to the desired value.
TIME DELAY
GENERAL
The TIME DELAY provides for a time delay
between the energizing of the voltage-sensing device
and functioning of the load-tap changing equipment.
The time delay is continuously adjustable from 10
through 90 seconds. To adjust the TIME DELAY,
rotate the adjusting knob indicated TIME DELAY
to the desired time.
14
The timer is set for 30 seconds at the factory, and
this is the recommended setting unless particular
applications indicate otherwise.
Charging time of the capacitor depends on the
length of time the timing cycle has been off. The
recovery time of the timer is essentially the same as
the charging or cycling time, thus the timer has an
integrating action until the output relay closes at
which time the timer automatically resets to zero
time.
CHECKING TIME DELAY
The CONTROL SWITCH must be in the AUTO
position to check time delay. Place the control in a
balance condition within the bandwidth. Start of time
delay is initiated when the control is instantaneously
placed out of the bandwidth by use of the level adjust.
The time between throwing the control out of the
bandwidth and when the motor energizes is the time
delay.
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0-ZZ009000/000V90990-8/dCIU-VI3 : Pl./90/000Z aseeletliOd peAoiddv
TO INDICATOR
PLUG ASSEMBLY
CONTROL CABINET
P2 P2 P2 ?2 P2 P2
13 3 6 7 8
P2
3 4
tA LI
i 9 10 2.0 8j 22 23
24
112 2
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25 26 27 28 29 30 31 32
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81 110 82 83 64 85 86 67 68 89
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CONNECTIONS FOR CONNECTORS
X A
xEAI- I-TN 2
X EA2- 2-7136
XEA3-3-Y93
XEA4- 4- YAI
XEA5- 5- 7134
xEA6-6-YA2
XE A7-7- 764
XEA8-8-YY1
XE49-9- YZI
XEA10-10-YM2
_ 12_
XB
XEBI-1 -YFI NN 9- I-YT4
XEB2-2-714 NNI0-2- YT I
X EB3-3-YB5 11N24-3-YX2
X EB4-4- 7132 NN23-4-YH5
XEB5-5-YG2 NN28-5- 163
XE136-6-YZI NN27-6- YG 1
X EB7-7- YCI NN30-7- YU2
XEB8-8-YBI N1129-8- YR2
5539-9-152 NN3I - 9- Y LI
BRACKET SHOWN DETACHED
FROM PANEL
REAR VIEW CONTROL PANEL ABSEMBLY
TX
1-7113
2 -XD3
5 6 7 8 9 10 II
4
YW
I -YF3
2-YY3
3-YE I
4-YES
5-YE3
6-YE4
7-1E5
8-YD4
9-703
10-YD2
I I-YD I
YY
I- SAN
2-YE
3-1582
4- X.132
VA
I -XA4
2-XA6
TR R
Ia. YC
I -1(88 1-3137
2-7(84 2-5139
3-5A3
4-XA5
5-X133
6-XA2 4
53
6
S2
I-YWii
7- \ I-YW3
2I 4- Y W8 I 4 , _2 - yyY wW4
w 56
3:4Wt 0 3 . .9
5-YE 5 5-Y D5
6-VHS
65-1WH67
4
R27
(
IF
I- XB I
2-7111
3- YH4
3-7W I
3
THy
11- llyz
I 2 1 -yQ
-SAN
I - XB6
1-712
-YG6
2- YPI
9-..VT
YG
I -XD6
2-X05
2 -11(3
2 -YJ
3 -XD5
4 -XA7
5 -1,4 I
6-YZ I
YP
I-YZ 2
2-Y K 2
4
IL
I-XD9 RT3
2-YJ2 ?
2
I 2 2
CBI
2
VTT
1 YH
-7F2
22 -Y06
3 -751
4 -4(F3
5 -XD4
6 -1E6
ym
RT2 YG5
? 1-IN
2-XA10
20
YO
I-721
2-7161
HINGE?'
55
EPT
YS
-YT3 0, 0 6-l(-'4
2 r-rwi
2-YT6
yl 3 2 I
I - XD2
2- YZ I
3-VS I
4- XDi
5- YZ2
6-752
NOTE NO.1: TRR - TRIM RESISTOR
NOTE NO.2: ALL CONNECTIONS -PREFIXED WITH "Y"
(VA' , 781, ETC.) ARE MOUNTED ON THE
CONTROL PANEL. ALL THOSE PREFIXED
WITH AN ?X" I XA1, XA2, ETC.) ARE MOUNTED
IN THE CABINET.
Fig. 9. Wiring diagram of control pane/ (G-E dwg. 777C385AB)
R24
C
PB
YE
I- VIZ
1 -Y42
2-YP2
2-VU 1
3-YR I
2 3 3-762
I 2
YN
RTI i-Yhii
2-XA
01 YR
i-11(3
o2 2-508
VU
? I - YK2
? 2-507
0
ch
0,
0-ZZ009000/000V90990-8/dati-VI3 : 171490/000Z aseeieu JOd 130A0iddV
L I F R27
THY VTT
INPUT
P2-I3 S2
L
HMO
4-?*
?[18.= 55. ELI CRS
All
84
83
RIO
AMP 2
TA MOTOR
$4.434 CATTIXOT FOOS
sal DONTROi2POBER tkr44.m't,IBID
CRI-CRI' RBDTIFIERS DIOIDBS
SRI! -5824 TENPEKFT?PF.COHPIPSOPHKI
TER25-t1t26 RECTIFIER MOORS
'It', CURRENT TRANSEORMER 02 4004E
,E2T EXTERNAL POWER TERMINALS
OUTPUT RELAYS %1T
,14, REACTANCE COMPENSATOR REACTOR
1?1 FILTER REACTORS
Rae tog.. OPERATION COUNTER
,g_a, OPERATION COUNTER SWITCH
AS ;fa_ SWITCH FOR DRAG HAND RESET
,gg POSITION INDICATOR SOCXET
J5) 1123-056-R3O-RS3-R34-055-5)35).-
532 CONTROL RESISTORS
024 TEST RHEOSTAT
tAgst TIME DELAY ADJUSTMENT RHEOSTAT '
Rfl RESISTANCE COMPENSATION
RHEOSTAT
BANDWIDTH ADJUSTMENT RHEOSTAE.1.
LtvOLTAGE LEVEL ADJUST RHEOSTAT
R3 ,RTI uPFER BAND EDGE INDICATOR
,RE2 LOWER BAND EDGE INDICATOR
RT3 REGULATOR NEUTRAL POSITION
INDICATOR
_B1 LINE DROP COMPENSATION POLARITY
SELECTOR SWITCH
52 COARSE REACTANCE COMPENSATION
? SELECTOR SWITCH
13_ FINE REACTANCE COMPENSATION
SELECTOR SWITCH
2_4_ CONTROL SELECTOR SWITCH
AO'S_ AUTOMATIC CONTROL
J., LOWER - g RAISE
TEST-BAND EDGE TEST
EXTERNAL POWER SUPPLY SWITCH
ift REGULATOR NEUTRAL POSITION
SWITCH
SILICON CONTROLLED
RECTIFIERS
SOL SOLENOID FOR DRAG HAND RESET
nt TO CONTROL TRANSFORMERS
THY SEMICONDUCTOR SURGE PROTECTOR
STI UNIJuNCTION TRANSISTOR
IOTT VOLTAGE TEST TERMINALS
ZENER REFERENCE 0100ES
CR16
cEn
CRI3
R25
A10
-F-!-3-3- CR17
S4 I S4
L TEST
t A7
02
K1
5528 A14 I ---,-
NN27
,P2-1I
LRS
Pt-I
05*
233
P2-5
LS
PI 50
NN26 P2-9
PIll
R
0.0
D6 ID7
C.C.S
NN 30
P2-12
Toe
NN29
P2-1
SOL
5
C R15 CR26 TEST
Dl
CRI4
R35
17))9
NNT31
RT3
/72-2
56
NOTE NO. II CR23, 24 AND 034 USED ONLY WHEN REQUIRES FOR TEMPERATURE COMPENSATION,
JUMPER IN PARALLEL WITH CR23 AND 24 WILL BE REMOVED WHEN COMPONENTS ARE REQUIRED.
NOTE No. 21 SEE NAMEPLATE FOR CONNECTIONS
RICTORY
ADJUST
Fig. 10. Schematic diagram of control circuit (G-E dwg. 777C385AB)
? - 12 POINT CONNECTOR BETWEEN TOP
OF COMPONENT BOARD AND PANEL
B - 9 POINT CONNECTOR BETWEEN
BOTTOM OF COMPONENT BOARD
AND PANEL
? - 9 POINT CONNECTOR BETWEEN
PANEL AND TERMINAL BOARD
ASSEMBLIES
0
0,
0,
Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
Approved For Release 2000/06/14: CIA-RDP78-06505A0007,29060022-0
T:0nifLUqF0PnS LAN-1663
4 3
POT. TRANS.
CAP
MOTOR
? L R
tt SI
1-'7 NEUTRAL LITE
SWITCH
c.--010 08 06 04 027
05 014 013 I si
d'OO o o Ij
POSITION 111.
INDICATOR
SONS S2
.17
D.Jgot?
,?`sz
\5
S2
ir 6
10 8 5 0
-S1;8-3r-f
SHORTING
JACK
52
POSITION INDICATOR CABLE
15 12 9
im mi
114 111 18 15 12
113 110 17 14
TO CONTROL CABINET
TERMINAL BOARD
POSITION INDICATOR PLUG (P2) TERMINAL BOARD
PIN NO. WIRE COLOR CONNECTION (NN)
I RED/WHITE 29
2 BLUE /WHITE 31
3 BLACK (41. 20 AWG) 23
4 WHITE OH 20 AWG) 2 4
GREEN 28
65 ORANGE /BLACK 20
7 ORANGE 2 1
8 BLUE 22
9 GREEN/BLACK 26
0 BLUE/BLACK i 0
1 RED 27
2 RED/BLACK 30
WHITE Ig* 16 AWG) 10
4 N. C.
5 BLACK (#16 AWG) 32
Fig. 11. Wiring diagram, position indicator and auxiliary devices (G-E dwg. 777C385AB)
17
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 3^/06/14 : ciA-Rop78-06505A000700q014122-0
GEH-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
AM P
GS CF
G S CS CF
AMP
2
GF GF CS
18
Fig. 12. Component board layout
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Awe'
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Line-drop Compensator
GEH-1663
LINE-DROP COMPENSATOR
The Line-Drop Compensator has adjustable posi-
tive resistance and reactance elements in the control
circuit which make it possible to simulate actual line
impedance. The reactance setting consists of a coarse
and fine adjustment knobs. A combination of these
adjustments provides a range of 0 to 24 volts.
A line current transformer inside the regulator
causes a proportional current to flow through the
R and X of the compensator circuit. The compensator
IZ drop is subtracted from the potential transformer
secondary voltage, and the resultant is applied to
the voltage sensor. This sensor causes the regulator
to hold a voltage high enough (or low enough) to
compensate for the voltage drop (or rise) to some
predetermined location on the line, thus causing the
voltage at this point to remain essentially constant.
The settings of the line-drop compensator are calcu-
lated using the equations shown on page 20.
For single-phase (2-wire) circuits double the as-
sumed R and X values, as the total impedance out and
1/0
2/0
3/0
4/0
MCM
250
300
350
500
750
1000
.656
.413
.263
.167
.132
.105
.083
.066
.053
18"
.135
.130
.124
.119
.115
.113
.110
.108
I .105
.103
.098
.096
.095
.092
.088
back must be factored. If the circuit consists of one
line and a grounded neutral, the total will be 1.67
times the assumed R and X values. For three-phase
circuits the loads are assumed to be balanced, and the
impedance for one wire only need be considered.
Sample calculations which illustrate how these
equations are applied for various circuit configurations
and regulator connections are shown on page 20. The
line resistance, reactance and current transformer
primary rating may be obtained from Tables 1 and 2.
It should be kept in mind that with delta or open-
delta connected regulators the settings obtained from
the calculations must be modified as illustrated in
Case IIIA of the sample calculations.
TABLE 1
R setting (volts) =
1?T* x resistance of the line (ohms)
Potential transformer ratio
X setting (volts) -icT* x reactance of the line (ohms)
Potential transformer ratio
*1,T =Current transformer primary current rating
RESISTANCE AND REACTANCE OF OPEN WIRE CIRCUITS PER
SINGLE CONDUCTOR IN OHMS PER 1000 FEET AT 60 CYCLES
COPPER - HARD DRAWN
REACTANCE
EQUIVALENT SPACING OF CONDUCTORS"
24" 30" 36" 42" 48" 54"
.142
.137
.130
.125
.122
.120
.117
.114
.111
.108
.106
.104
.101
.098
.095
.147
.142
.135
.130
.127
.125
.122
.119
.116
.113
.111
.109
.107
.103
.100
.151
.146
.140
.135
.132
.129
.127
.124
.121
.118
.115
.113
.111
.107
.104
.155
.150
.143
.138
.135
.132
.130
.127
.124
.121
.119
.117
.114
.111
.108
.158
.153
.146
.141
.138
.136
.133
.130
.127
.124
.122
.120
.117
.114
.111
.161
.156
.149
.144
.141
.138
.136
.133
.130
.127
.125
.123
.120
.117
.114
60"
ceN
AWG
.163
.158
.151
.146
.143
.141
.138
.135
.132
.129
.127
.125
.123
.119
.116
THE ROOT AVERAGE OF THE DISTANCE BETWEEN CENTERS OF CONDUCTORS
6
4
2
1/0
2/0
3/0
4/0
MCM
266.8
336.4
397.5
477.0
556.5
799.0
954.0
1272.0
r-`
.675
.425
.267
.168
.134
.106
.084
.066
.053
.045
.037
.032
.022
.019
.014
ALUMINUM - STEEL REINFORCED
REACTANCE
EQUIVALENT SPACING OF CONDUCTORS"
18"
24"
30"
36"
42"
.132
.138
.143
.147
.151
.126
.133
.138
.142
.146
.122
.129
.134
.138
.142
.118
.125
.130
.134
.138
.116
.123
.128
.132
.136
.114
.121
.126
.130
.134
.112
.119 .124
.128
.132
.098
.104 .109
.113
.117
.094
.101 .106
.110
.114
.093
.099
.105
.109
.112
.091
.097
.102
.106
.110
.089
.096
.101
.105
.108
.085
.092
.097
.101
.105
.084
.090
.095
.099
.103
.079
.086
.091
.095
.099
TABLE
2
Regulator
Current Rating
25
50
75
100
150
200
219
250
C.T. Primary
Current Rating
25
50
75
100
150
200
250
250
Regulator
Current Rating
394
400
438
500
548
666
668
833
1000
1250
CT. Primary
Current Rating
400
400
600
600
600
600
600
800
1200
1200
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
48"
.154
.149
.145
.141
.139
.137
.135
.120
.117
.115
.113
.112
.108
.106
.102
54"
60'
.157
.152
.148
.144
.142
.140
.138
.123
.120
.118
.116
.114
.110
.108
.105
.159
.154
.150
.146
.144
.142
.140
.125
.122
.120
.118
.117
.113
.111
.107
300 334
300 400
1332 1665
1600 1600
19
Approved For Releas 00/06/14 : CIA-RDP78-06505A000700110022-0
GEH-I663 Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
SAMPLE CALCULATIONS
ASSUME CIRCUIT IMPEDANCE VALUES OUT TO LOAD CENTER TO BE: R=1.5 ohms X=2.0 ohms
CASE
Single-phase circuit
2500-volt PT Ratio 20:1
CT Primary rated 100 amps.
R setting = IcT x 2R = 100 x 3 = 15 volts
PT 20
X setting = IcT x 2X= 100 x 4 = 20 volts
PT 20
3
0
0 0
CASE II
2500/4330Y- volt, 3-phase circuit
Three, Single-phase regulators
connected line to neutral.
PT Ratio 20:1
CT Primary rated 100 amps.
R setting = IcT x R = 100 x 1.5 = 7.5 volts
PT 20
X setting = IcT x X = 100 x 2.0 =- 10 volts
PT 20
L
s
S
S L
2 s S L
S L
. 3
2500-volt, 3-phase, 3-wire circuit
Two, single-phase regulators
connected in an open delta bank.
PT Ratio (line to line) 20:1
Cr Primary rated 100 amperes
Convert the PT ratio to a line
to neutral basis.
CASE 111 A
2
3
R setting ::IcT x R = /00 x 1.5 = 13 volts
PT/N/3 20/1.73
X setting = IcT x X = 100 x 2 = 17.3 volts
PT/ V3 20/1.73
With two regulators in open delta there is a 30? phase displacement between the PT (line to line) voltage and
the line current. The current lags in one regulator and leads in the other. Further modifications are necessary.
Determine which is the "lead" and which is the "lag" regulator from directions on page 11.
The basic L.D.C. settings should be modified as follows:
Lead Regulator Lag Regulator
R mod = 0.866R 0.5X = 0.866R - 0.5X
(0.866(13) -I (0.5)(17.3) = 19.9 volts (0.866)(13) - (0.5)(17.3) = 2.6 volts
X mod = 0.866X - 0.5R = 0.866X + 0.5R
(0.866)(17.3) - (0.5)(13) = 8.4 volts (0.866) (17.3) --I- (0.5) (13) = 21.4 volts
For minus values of R or X set compensator polarity switch to correspond.
CASE Ill B
2
3
Three, single-phase regulators
connected in a delta bank.
PT Ratio (line to line) 20:1.
CT Primary rated 100 amps.
Convert the PT ratio to a line
to neutral basis.
Compute the basic L.D.C. settings exactly the same as for Case III A above. All three regulators either
"lead" or "lag" depending upon the phase rotation of system voltages. From directions on page 11; determine
whether the regulators "lead" or "lag". Then modify the basic settings for "lead" or "lag" per Instructions
under Case 111 A.
20
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2000/06/14 : CIA-RDP78-06505A000700060022-0
:zcluiator tor (rounded-Y Ctrcuits GEH- 1 663
LGULATOR FOR GROUNDED-Y
The step voltage regulator rated 19920/34500 volts
is designed for use on 34500 grounded-Y circuits.
This regulator is designed with two 34.5-kv class line
bushings (S and L) for use on circuits limited to
150-kv BIL. The neutral is brought to a 15-kv
bushing (SL).
Regulators rated 14400/24940 volts are designed
for use on either 14400 delta or 24940 Grounded-Y
circuits. A tap is provided for operation at 7200 volts
delta or 12470 Y operation at reduced capacity. The
iJ LA TOR
SOURCE
GROUND
-J
7
LOAD
THYRITE
SERIES WDG.
CURRENT
24 TRANSFORMER
II
EXCITE WD .
REVERSING
SWITCH
REACTOR
POTENTIAL
RANSFORMER
20
RD,
20 11
.4
POSITION
4-INDICATOR
HOUSING
Fig. 13A. Schematic diagram showing two-core
regulator with a series transformer
SOURCE
LOAD
CURRENT
24 TRANSFORMER
REACTOR
20
0
-J
POSITION
4- IN DICATOR
HOUSING
CIRCUITS
current rating of the regulator must not be exceeded
when operating at the lower voltages.
The regulator is designed with two 25-kv class line
bushings (S and L) and a 15-kv class neutral bush-
ing (SL).
When operating on a 25-kv or 34.5-kv circuit, the
SL bushing must be solidly grounded or grounded
through an impedance that will limit the low frequen-
cy and impulse from neutral to ground to the 15-kv
insulation class.
CONNECTIONS
Fig. 13C. Schematic diagram showing connections
of regulator for GRDY circuits
SOURCE
EXCITED WOO.
,REACTOR AND
UA IZER
POTENTIAL
TRANSFORMER
GROUND?O.
POSITION
4,- INDICATOR
HOUSING
Fig. I38. Schematic diagram showing two-core
regulator with a series autotrans former
POSITION
4- I N DICATOR
HOUSING
Fig. 13D. Schematic diagram showing single-core
regulator
21
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
0-ZZ009000/000V90990-8/dati-VI3 : 171490/000Z aseeieu JOd 130A0iddV
TROUBLE-SHOOTING CHART
TROUBLE
CAUSE
REMEDY
I. Regulator will not op-
1. Loss of sensing signal from
1. Using an AC voltmeter check for control sensing voltage at the voltage test terminals.
erate either automati-
the regulator.
If no voltage at this point, either the external power supply switch or the circuit breaker
cally or manually or re-
is defective. Check for sensing voltage between NN9 and NN1 O. If no voltage appears
mains in maximum lower
at these terminals, the problem is outside the controls. If voltage does appear at this
or maximum raise po-
sition.
point, check for faulty external power supply switch or a faulty circuit breaker.
2. Motor circuit is not func-
2. If correct voltage is measured at the voltage test terminals, place the control switch
tioning properly or the con-
to raise position (check to be sure the regulator is not in the maximum raise position).
trol switch may be defective.
Place an AC voltmeter (150-volt scale between NN27 and NN26. If voltage is not
measured here, the control switch is faulty. If voltage does appear here, the motor
circuit is defective.
3. Indicator switches are not
operating properly.
3. See page 26 for removing indicator dial.
II. Regulator functions
1. Loss of sensing voltage to
1. & 2. Check sensing circuits and relay voltage supply circuits as follows: Set the
manually but not auto-
the bridge rectifier or the
control switch to "Test" observing the band edge indicator lights, with 120 volts sup-
matically in either the
zener bridge which are lo-
plied to the control, from either the internal regulator supply or from an external
raise or lower direction.
cated on the component
source connected to the terminal marked "External" and power supply switch to po-
board assembly.
sition marked "External."
2. Defective relay voltage
Vary the level adjustment in and out of the bandwidth in both above and below 120
supply.
volts by use of the level adjust control. If the lights indicate the correct voltage level,
voltage supply to the relay is correct. If not, problem lies in these circuits. Elimination
of level adjust rheostat would isolate the problem to the component board. This may
be accomplished by disconnecting the "B" (9 point connector) plug assembly between
the component board and the panel.
CAUTION: Turn off power before disconnecting.
With an analyzer check the level adjust rheostat R29 for a range of 0-425 ohms
10%. Also check continuity between panel ground and rheostat terminals to make
sure terminals are not grounded. Replace rheostat if defective. If rheostat agrees with
correct range and ground test, sensing circuits located on board are defective. Replace
component board.
3. Defective Time Delay Cir-
3. If the timing circuit does not function, the silicon rectifier SCR 2 will not conduct and
cuit.
complete the ground circuit for the relays. Test the time delay rheostat R25 similar to
the level adjust test as above except the range will be from 0 to 2.5 megohms 10%.
Replace rheostat if defective. If rheostat is normal, problem will be located on the
board assembly. Replace component board.
Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
0-ZZ009000/000V90990-8/dati-VI3 171490/000Z aseeieu JOd 130A0iddV
S 1-1 G C A 'A C rr: ?
TROUBLE
CAUSE
REMEDY
III. Regulator runs to 1. Defective Relays or Sens-
maximum Raise or max- ing Circuits.
imum Lower limit.
1. If sensing circuits are functioning properly, check for sticking relays. Replace relays,
if defective. Caution should be taken when relays are removed from the board. All
connections from the relay to the board should be disconnected at the relay and not
the board.
IV. Incorrect level or 1. Defective Sensing Circuits.
Control cannot be bal-
anced. 2. Position indicator plug not
fastened securely.
1. Check circuits as in II above.
2. If the position indicator plug is not fastened securely so the shorting pin is not spread-
ing the CT shorting jack to break the short, a grounding of either side of the CT will
result depending on the position of the ground in the circuit. An increase of input voltage
by approximately 6 volts will be necessary to balance.
(i.e., Control level set for 120, balance will occur at approximately 126 volts), or the
control cannot be balanced. Check indicator plug for proper alignment or inter-
ference and fasten securely.
V. Regulator operates
frequently.
1. Incorrect bandwidth.
2. Time Delay setting is too
low or the circuits are mal-
functioning.
VI. Regulator bucks 1. Reversed polarity in either
when load increases, the current transformer or
potential transformer.
1. With selector switch in the "Test" position, check bandwidth setting by using band
edge indicators and an A.C. voltmeter at the voltage test terminals. See bandwidth
check in control settings under "Operation of Static Control," page 13. To check the
band rheostat, disconnect power, then disconnect the "B" plug (9 point connector).
With an analyzer check the resistance of each layer of the bandwidth rheostat R28.
Each layer should be 25 ohms 5%). Also check for shorting between the panel
ground and terminals of each layer. Replace bandwidth rheostat, if defective. If
rheostat is normal, replace the component board.
2. The control switch must be in the "Auto" position to check time delay. Place the
control in a balanced condition within the bandwidth. Start of time delay is initiated
when the control is instantaneously placed out of the bandwidth either by use of the
level adjust or the test rheostat.
The time between throwing the control out of the bandwidth and when the motor
energizes is the time delay. If this is drastically different ( 20%) from the calibrated
setting, the time delay circuit is malfunctioning. Remove component board and return
for replacement.
1. Reverse the current transformer leads in the control cabinet in this manner: Disconnect
leads No. NN24 and NN23 (on current transformer resistor) and reverse connections.
WARNING: Short-circuit current transformer so that the secondary will not become
open-circuited. (Current transformer is short-circuited automatically by removing
indicator plug from indicator.)
6u9ooys-aognoJi
0-ZZ009000L000V90990-9Ldati-V13 171490/000Z aseeieu JOd 130A0iddV
0-ZZ009000/000V90990-8/dati-VI3 171490/000Z aseeieu JOd 130A0iddV
TROUBLE-SHOOTING CHART (Continued)
TROUBLE
CAUSE
REMEDY
VII. Line Drop Compen-
1. Shorting jack in the indi-
1. Remove the indicator plug and check the shorting pin for physical defects. If de-
sator is not functioning
cator plug is not open.
fective, replace. If shorting pin is normal, reconnect indicator plug and secure tightly
in either reactance or
resistance or both.
to be sure the shorting pin is disengaging the shorting jack.
2. R32 is defective.
2. Disconnect the indicator plug and "B" connector (9 point plug) within the control
cabinet. With an analyzer, check the resistance of R32. A value of 150 ohms 10%
should be measured. If not, resistor is defective and should be replaced.
3. Si, S2 or S3 is defective.
3. With the indicator plug and "B" connector disconnected, measure the resistance
between NN23 and NN24 with an analyzer. With both compensator controls set at
zero, the resistance of R32 (150 ohms) would be measured again. If not, either Si, S2
or S3 may be defective. Check each switch for corrosion or mechanical defects. If
defects exist, replace the particular switch. Switching to all positions on each switch
would aid in determining fault.
4. Defective Rheostat R27.
4. With the indicator plug and "B" connector disconnected, measure the resistance
between the slide arm and one end terminal. Vary the rheostat from one extreme to
the other, a variation of 24 ohms 1%) should be noted. If not, rheostat is defective
and should be replaced.
5. Defective Current Trans-
5. I, all components in 1, 2, 3 and 4 are normal, but no compensation exists, a de-
former.
fective current transformer is the probable cause.
VIII. Motor does not
1. Motor or motor capacitor
1. Disconnect the four leads from the capacitor terminals, apply 240 volts, 60 cycles
operate.
may be faulty.
to the terminals, and read the current in the line. This reading should be approximately
0.36-amperes. Discharge the capacitor before reconnecting the leads.
2. Motor may be faulty.
2. Reconnect capacitor, apply 120 volts directly to the motor. Refer to Control Diagram
for connections.
0
cy.
Installation, Operation and Maintenance of Step Voltage Regulators, Type MI.32
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Maintenance GEH-1663
MAINTENANCE
INSPECTION
At regular intervals, as determined by service,
inspect the regulator to make sure it is operating prop-
erly and to detect and correct any trouble which may
interfere with efficient service.
To check the operation, it is not necessary to un-
tank the regulator. Run the regulator to its "Raise"
and "Lower" limit positions by using the manual
control switch to test the limit switches.
By manual control, run the regulator in either
direction a few steps, and then turn the regulator
back to AUTO to check the voltage sensor. After
a time delay (30 seconds as set at the factory) the tap
selector will operate and come to rest.
The devices in the control cabinet require very little
maintenance.
If the control has to be removed from the regula-
tor pull the plug from the socket assembly, which
is mounted under the indicator. The regulator can
remain energized, as the current transformer is auto-
matically short-circuited by a shorting jack on the
socket assembly when the plug is removed.
UNTAN KING
To untank the regulator, follow the procedure out-
lined below.
WARNING: De-energize the regulator before untanking.
WARNING: Always release any possible pressure in the
tank (which may accummulate due to loading-cycle or
ambient-temperature change) by slowly loosening the
handhole coverband. DO NOT attempt to remove the
cover or handhole cover until the pressure has been
released.
1. Remove the handhole cover.
2. Disconnect the bushing cables.
3. Remove the cover band, and lift off the cover.
4. Disconnect the plug inside the regulator tank
at the indicator.
5. Disconnect the position indicator flexible cable
at the indicator.
6. Remove the tanking bolts at top of unit.
7. Lift the regulator from the tank, using the holes
at the top of the uprights.
When lifting the regulator from the tank, the use of
a spreader bar is recommended. See Fig. 14.
8. When retanking the regulator, follow the reverse
procedure outlined above except when replacing
cover, tap cover with rubber hammer around
the edge to properly seal gasket while tighten-
ing coverband.
Fig. 14. Untanking Type ML32 step voltage regu-
lator. Showing use of spreader bar when
lifting regulator from tank.
9. Position-indicator pointer should be centered on
"0" before connecting shaft to the mechanism.
For indexing the indicator, move flexible shaft
When regulator is untanked, the mechanism may
be operated by applying 120 volts to terminals (25)
or (26) on motor capacitor and No. 10 lead. Connec-
tion to No. 10 lead is made on the exposed terminal
which is tied to the insulated mechanism spacer.
Caution should be exercised not to run the mech-
anism beyond the maximum RAISE or LOWER
position since the electric limit switches (in the posi-
tion indicator) are out of the circuit now.
A yellow mark inside the regulator tank indicates
the level at which the oil should be maintained at all
times. Check the dielectric strength of the oil, and, if
found to be 22 kv or below, filter the oil to restore its
dielectric strength to 26 kv or more.
25
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Releas00/06/14 : CIA-RDP78-06505A00070"0022-0
GEH-1663 Installation, Operation and Maintenance of Step Voltage Regulators, Type ML32
REPLACING INTERNAL CLAMP BUSHING
Remove the main cover from the regulator and
disconnect the bushing cable. Loosen the three screws
on the holder and remove the garter spring. Bushing
can now be temoved from the cover.
Replace bushing using the reverse procedure. When
tightening the holder screws, equalize the torque on
all three screws.
REMOVING INDICATOR DIAL
ASSEMBLY
Disconnect the cable and plug assembly from the
position indicator. Loosen the three thumb screws and
open indicator glass assembly. Remove three self-
tapping screws located on outside perimeter of the
dial face. Carefully pull out dial assembly which
contains pointer, drag-hand assemblies and limit
switches. The operation counter switch and drag-
hand solenoid will be exposed when the dial assembly
is removed. To remove dial assembly completely,
remove the flag terminal from the limit switches.
CONTACT INSPECTION
The table which follows is given as a guide for
inspecting the contacts of your regulator on the basis
of minimum life. It should be used for the first inspec-
tion. It is recognized that many variables affect the
contact life, such as load factor, overload, service,
short-circuit, etc.
Total contact life can be determined after this in-
spection on the basis of the amount of arcing material
left in proportion to that which has been eroded.
The wiping surfaces of the moving contacts of the
tap-selector switch, when new, are -inch wide. The
surfaces of the stationary contact arc-resisting ma-
terial are A -inch wide.
The contacts are satisfactory for service until the
moving contact is reduced almost to a line contact.
Refer to regulator nameplate for rating, and de-
termine the contact inspection point from the chart.
EXPECTED MINIMUM NUMBER OF OPERATIONS
USED AS A GUIDE FOR CONTACT REPLACEMENT
ON BASIS OF CURRENT IN TABULATION BELOW
KVA
VOLTS
AMP
LIFE
INSPECT
100
2500
400
1,650,000
1,250,000
100
5000
200
1,530,000
1,150,000
114.3
7620
150
2,000,000!
1,500,000
125
2500
500
1,114,000!
850,000
125
5000
250
1,210,000
900,000
138
13800
100
1,460,000!
1,100,000
144
14400
100
2000,000:
1,500,000
167
2500
668
815,000
610,000
167
5000
334
1,910,000
1,425,000
167
7620
219
1,150,000!
865,000
200
19920
100
2,000,000:
1,500,000
250
2500
1000
2000,000:
L500,000
250
5000
500
735,000:
550,000
250
7620
328
820,000,
615,000
288
14400
200
1,150,000
865,000
On the same basis, other ML32 regulators rated
less than 100 kva can operate in excess of 1,000,000
tap changes before inspection is required. This will be
more than 25 years for normal service.
PARTS LIST
Furnish your nearest General Electric Sales Rep-
resentative with ALL of the following information:
REGULATOR SERIAL NUMBER (found on reg-
ulator nameplate)
TYPE OF REGULATOR (All parts of this book are
for Type ML32, single-phase step voltage regulators
of standard design.)
QUANTITY OF EACH PART REQUIRED
REFERENCE NUMBER OF EACH PART (as
shown in this book)
DESCRIPTION OF EACH PART (as shown in
this book)
The General Electric "Triple-R" Parts Service Pro-
gram offers you extra-swift shipment of common re-
26
placement items. Regulator parts shown in this book
having reference numbers prefixed by the letter "R"
will be on their way to you within 48 hours of the re-
ceipt of your order at our factory.
NOTE: Shipment of parts NOT bearing the "R"
prefix will be dependent upon the airailability of the
parts requested. In cases where "R" parts and "non-R"
parts appear on the same order, you will receive two
shipments, UNLESS YOU SPECIFICALLY RE-
QUEST THAT A SINGLE SHIPMENT BE MADE.
Should you request single shipment, any parts bearing
the "R" prefix will not receive Triple-R Rapid Parts
Service.
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release,2900/06/14 : CIA-RDP78-06505A000700060022-0
Parts List GEN-1663
Station type
R 2008A
Load-bonus position indicator
R2002
R2001
R2 00Th
Pole type
R2002
R2001
FIG.
NO.
REF.
NO.
DESCRIPTION
15
2000
High-voltage bushing assembly?complete
15
R2001
Bushing porcelain
15
R2002
Bushing terminal
t
R2003
Bushing terminal gasket
t
R2004
Bushing cover gasket
t
R2005
Hand-hole gasket
t
R2006
Cover gasket
15
R2007A
Load bonus position indicator
15
R2008A
Load bonus indicator glass assembly kit
t
R2009
Indicator gasket
15
2010
Control cabinet assembly
t
R2011
Sampling plug
15
R2013
Cover band
15
R1900
Indicator dial and switch assembly
15
R1901
Solenoid
15
R1902
Counter switch
t Not illustrated.
Fig. 15. Type ML32 step voltage regulators
27
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2 00/06/14: CIA-RDP78-06505A000700060022-0
GEH-1663 Parts List for Step Voltage Regulators, Type M1.32
2019
2017
20)4
28
Fig. 16. Type ML32, reactor side
Fig. 18. Pole-type hangers
R2021
2018
2016
2015
2014
Fig. 17. Type ML32, mechanism side
2016
2022
2015
FIG.
NO.
REF.
NO.
DEScRIPTION
16-17
2014
Core
16-17
2015
Coil
16-17
2016
Clamps
16
2017
Reactor
16
2018
Current transformer
16
2019
Pot transformer
t
2020
Thyrite assembly
16
R2021
Thyrite disks
17
2022
Switch mechanism
18
R2 I 39
Pole-type hangers
I- not shown.
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Parts List GEH-1663
2026
R2032
R2039
R2033
R2035
R2053
R2042
R2029
R2039
R2051
R2037
82033
2026
-
Fig. 19. High current switching mechanism
R2028
? 82049
R2049
R2047
R2043
R2044
R2036
R2052
8205!
82054
2048 2048
2050
R2044
R2043
R2035A
82035A
82057
R2056
R2041
R2042
82042
R
81903 2047
Fig. 21. Low current switching mechanism
2048
2050
Fig. 20. High current switching mechanism
82028
R2030
R2031
82032
R2033
2026
Fig. 22. Low current switching mechanism
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
29
Approved For Releas^000/06/14 : CIA-RDP78-06505A00074100022-0
GEH-1663 Parts List for Step Voltage Regulators, Type ML32
2048
R2028 R2045
R2029 R2030
R2035A
R2053
R2054
R2031
R2038
R2037
1R1903
30
Fig. 23. Low current switching mechanism
R2037
R2038
R2051
R2054
R2053
2048
Fig. 24. High current switching mechanism
FIG. NO.
REF. NO.
DESCRIPTION
21-22-23
2026
Contact panel assembly
25
2027
Slip ring assembly
20-21-23-25
R2028
Reversing switch moving contact
assembly
20-21-23-25
R2029
Reversing switch stationary
contact assembly (lower)
21-22-23-25
R2030
Reversing switch stationary
contact assembly (raise)
23-24-25
R2031
Reversing switch connector rod
20-22-25
R2032
Moving contact assembly
21-22-25
R2033
Stationary contact assembly
25
R2034
Moving contact stud
19-24-25
R2035
Crank gear assembly
21-22-23-25
R2035A
Crankshaft assembly
25
R2036
Shaft for crank gear
23-24-25
R2037
Geneva segment
24-25
R2038
Shaft for Geneva segment
23-25
25
R2039 .}
R2041
Geneva gear and shaft assembly
19-21-22-25
R2042
Crank and spring assembly
19-24-25
R2043
Driver
2/-23-24-25
R2044
Gear
20-23-25
R2045
Gears
22-24-25
R2046
Motor and pinion
22-23-24
R2047
Capacitor
22-23-24
2048
Motor drive panel assembly
19-21
R2049
Spacer assembly
21-22-23-24
2050
Base
19-21-24
R2051
Impeller gear
19-25
R2052
Shaft for impeller gear
21-23
R/903
Neutral light switch assembly
23-25
R2054
Shaft for impeller
20-22-23-24
R2057
Indicator miter gear assembly
25
R2058
Flexible shaft
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Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Noe
Parts List GEH- 1 663
R2058
R2057*
R2047
R2053
R2044
11
R 2035*
R2035AA
R 2045
R2045
R2054
82051 R2038 R236 82052 82034
2048
202
4
R2030 82029
82039*
82041
R2032*
Fig. 25. Parts for switching mechanisms
R2031
R2034 A
R2037
R2032a
LEGEND
*FOR HIGH CURRENT SWITCH
FOR LOW CURRENT SWITCH
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Releas"000/06/14 : CIA-RDP78-06505A000704100022-0
GEH-I 663 Parts List for Step Voltage Regulators, Type ML32
R2207
R2205
R2221
R2203
R2202
R22I3
R221 2
R221I
R2209
R2200
R2220
R22I9
R2206 R2204
32
Fig. 26. Control panel, front view
R2201
R2210
R2218 R2208 R2 17 R2216 R2204 R2214
R2207
-R2205
R2221
R2202
2203
R2213
R2215
:22:0191
R2220
R2200
R2210
R2201
Fig. 27. Control panel, rear view
FIG.
NO.
REF. NO.
DESCRIPTION
R2200
Operation counter
R220I
Control power circuit breaker
R2202
Control selector switch with knob
R2203
Test rheostat
R2204
Time delay rheostat
R2205
Resistance rheostat
R2206
Bandwidth rheostat
R2207
Voltage-level rheostat
R2208
Relays
R2209
Output test terminals
R2210
External power supply terminals
R2211
Reset switch
R22 12
Neutral light
R2213
High and low lights
R2214
Line-drop compensator reactor
R2g15
Thyrector
R2216
Resistor
R2217
Input transformer
R2218
Component board
R2219
Reactance switches
R2220
External power supply switch
R222I
Polarity switch
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Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Parts List GEH-1663
Fig. 28. Component board
33
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
34
Approved For ReleasOlt000/06/14 : CIA-RDP78-06505A0007^0022-0
NOTES
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
Approved For Release 2000geitiimattrali1Eqg3s(06563A0004,9060022-0
READY TO ASSIST YOU . ..Vren You Have Electrical Problems . . . Need Further Information . . . Require Ordering Instructions
SALES OFFICE CODE KEY
* Industrial Equipment (including Agent
and Distributor) Sales
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T Component Sales Operation
ALABAMA
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t ? Los Angeles 90054
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* 1- Sacramento 95816
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San Jose 95128
2151 Highland Ave.
704 Government St.
3550 N. Central Ave.
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14
11100 E. Washington
P. 0. Box 1033
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? Cocoa Beach (Cape Canaveral Office)
1325 N. Atlantic Ave.
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t Charlotte 28202
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I Bismarck 58501
^ t
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Dayton 45402
Dayton 45402
Mansfield 44906
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Youngstown 44507
GENERAL ELECTRIC
WHEN YOU NEED SERVCE . . . These G-E service shops will repair, recondi-
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VIRGINIA
? ? Newport News 23601
P.O. Box 1038, 311 Main St.
t Richmond 23230 5001 W. Broad St.
* t Roanoke 24005 920 S. Jefferson St.
832 Georgia Ave.
322 Commerce St.
1 Hannah Ave., N.W.
. 1420 Union Ave.
P.O. Box 1040
1717 W. End Bldg.
253 Main St., East
442 Cedar St.
403 Amarillo Blvd.
1385 Calder Ave.
205 N. Chaparral
01 Stemmons Freeway
215 N. Stanton St.
408 W. Seventh St.
4219 Richmond Ave.
500 E. 50th St.
122 North N St.
419 S. Main Ave.
200 S. Main St.
381/2 Center St.
WASHINGTON
t Pasco 99301
t ? Seattle 98104
Spokane 99220
t Spokane 99220
WEST VIRGINIA
Charleston 25328
Fairmont 26555
Wheeling
WISCONSIN
* I ? Appleton 54910
t Madison 53703
? i5 Milwaukee 53233
CANADA:
HAWAII:
824 W. Lewis St.
710 Second Ave.
S. 162 Post St.
E. 1805 Trent St.
306 MacCorkle Ave., S.E.
310 Jacobs Bldg.
40 Fourteenth St.
510 W. College Ave.
340 W. Washington Ave.
940 W. St. Paul Ave.
Canadian General Electric Company,
Ltd., Toronto
American Factors, Ltd., P.O. Box 3230,
Honolulu 96801
SERVICE SHOPS
performance of your equipment. For full information
contact your nearest service shop or sales office.
KANSAS
"(Strother) Arkansas City
G.E. Co., P.O. Box 797
KENTUCKY
Louisville 40209 3900 Crittenden Drive
LOUISIANA
New Orleans 70117 1115 De Armas St.
MARYLAND
Baltimore 21230 .920 E. Fort Ave.
MASSACHUSETTS
(Boston) Medford 02155
3960 Mystic Valley Parkway
MICHIGAN
Detroit 48202 5950 Third St.
MINNESOTA
Minneapolis 55430 2025-49th Ave., N.
MISSOURI
Kansas City 64120 3525 Gardner Ave.
St. Louis 63110 1115 East Road
NEW YORK
Albany 12205 1097 Central Ave.
Buffalo 14211 318 Urban St.
"(New York) Linden, N. J.
1611 W. Elizabeth Ave.
(New York) North Bergen, N. J. 07047
6001 Tonnelle Ave.
Schenectady (Instrumentation Service) 12305
1 River Road
NORTH CAROLINA
Charlotte 28208 2328 Thrift Road
OHIO
Cincinnati 45202 444 W. Third St.
about these services,
Columbus 43223
P.O. Box 6198, 2128 Eakin Rd.
Toledo 43605 405 Dearborn Ave.
Youngstown 44507 272 E. Indianola Ave.
OREGON
Portland 97210 2727 N.W. 29th Ave.
PENNSYLVANIA
Allentown 18103 668 E. Highland St.
Johnstown 15902 841 Oak St.
Philadelphia 19124 1040 E. Erie Ave.
(Pittsburgh) Homestead 15120
4930 Buttermilk Hollow Rd., RD #1,
West Mifflin, Pa. 15122
York 17403 54 N. Harrison St.
TEXAS
UTAH
Corpus Christi 78401 115 Waco St.
Dallas 75235 3202 Manor Way
Houston 77020 5534 Harvey Wilson Drive
Midlond 79704 704 S. Johnston St.
Salt Lake City 84104
VIRGINIA
Richmond 23224
Roanoke 24007
P.O. Box 1327,
WASHINGTON
Seattle 98134
*Seattle 98108
Spokane 99206
WEST VIRGINIA
Charleston 25328
WISCONSIN
Appleton 54910 Midway Industrial Area
"Cincinnati 45232 260 W. Mitchell Ave. P.O. Box 83 County Trunk P
301 S. 7th West St.
1403 Ingram Ave.
115 Albermarle Ave., S.E.
3422 First Ave., S.
220 Dawson St.
E. 4323 Mission St.
. 306 MacCorkle Ave.
4477 East 49th St. Milwaukee 53233 940 W. St. Paul Ave.
Approved For Relast2osoggati leve 4477 a
L ECE PAZOr-05gAgiN7P0060022-0
Approved For Release 40D/06/14 : CIA-RDP78-06505A000700
VOLTAGE REGULATOR BUSINESS SECTION
GENERAL ELECTRIC
PITTSFIELD, MASSACHUSETTS
22-0
4-67 (3m) Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
25X1A
25X1A
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
1.
67-9043,
Chief Procurement Division, OL
Chief, Real Estate & Coast
co
Requisition Mo. 770-67-26291
System)
,6.AP 13 196,7
Division, OL
Electrical Distribution 25X1A
Please amend Requisition 140 770-67-26291, Voucher No.
as follows:
a. Cancel Item 1 of the basic requirements.
b. Cancel amendment No 1.
Add the following:
3 each General Electric AL-32 single phase, step-
voltage regulators, rated 265 KVA, 14.4 KV with tap for
reduced voltage operation at 13.8 KV at 200 amps, GE
Cat. No. 29D 1843. Unit price 0,051.00. Regulators
are to be operated in Delta.
2. In order for the Station to construct a building to house
these regulators, it is requested that dimensional drawings, schematic
diagrams and operational mammals be obtained and forwarded to this
office as soon as possible. Also please try to obtain the best possible
delivery date as the field has an urgent requirement for this it.
Distribution:
Orig. &l -
_
-
Addressee
OI./RECD Project
OLIRECIVUEB Carom
ded
April i()
Approved For Release 2000/06/14: CIA-RDP78-06505A000700060022-0
25X1A