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INSTALLATION Westinghouse 1. L 41-663. 2A
• OPERATION • MAINTENANCE
INSTRUCTIONS
TYPE SGR-12 AUTOMATIC RECLOSING RELAY
CAUTION Before putting relays into service, remove
all blocking which may have been inserted for the
purpose of securing the parts during shipment, make
sure that all moving parts operate freely, inspect
the contacts to see that they are clean and close
properly, and operate the relay to check the settings
and electrical connections.
APPLICATION
* The type SGR-12 Reclosing relay provides an
instantaneous reclosure of an electrically operated
circuit breaker, and automatically resets itself if the
breaker remains closed for a predetermined adjustable
time interval. If the breaker re-trips before the end
of this interval the resetting operation of the relay
is interrupted until the breaker is manually closed.
Thus the reclosing relay is applicable to either
attended or non-attended stations. The SGR-12 relay
is also available with two timing units for applica
tions where it is desired to delay reclosing.
CONS TRUCTION AND OPERATION
The type SGR-12 relay consists of one or two
synchronous motor operated time-delay unit and a
toggle unit.
The time-delay unit, consists of a 600 R.P.M.
(for 60 cycles) synchronous motor driving a contact
arm through a gear train. A bridging contact member
on the end of the contact arm closes a circuit through
two stationary contact studs at the end of the time
scale. The starting position, and length of travel of
the contact arm is determined by the position of an
adjustable stop, which can be set with reference to
a scale on the upper gear plate by loosening the upper
bearing screw of the last gear shaft and moving the
stop to the desired position. The time-delay for full
scale travel is approximately 92 seconds, and the
smallest scale division represents a delay of slightly
over 9 seconds.
When the motor is energized the armature is lifted
magnetically to a point where a pinion on the lower
SUPERSEDES I.L. 41-663.2 *Denotes Changes From Superseded Issue
end of the armature engages a gear on the motor
countershaft. When the motor is de-energized this
pinion de-meshes, and by this reduction of the re
setting load on the spring which is a part of the final
shaft assembly much faster resetting of the contacts
is obtained.
A resistor is connected in series with the motor
coil for 240 volt operation and by-passed for 120 volt
operation. The motor coil circuit is connected at the
factory for 240 ·volt service.
The toggle unit consists of two electromagnets,
with a common armature having two pins resting in a
groove in the molded base. The other end of the
armature is held in one of two positions by means of
a toggle spring which produces the toggle action. The
spring is protected by a lock pin which may be left
in after installation. The moving contacts are mounted
at one end of the armature and the stationary contacts
are mounted on either side.
* The operation of the relay and related control
equipment may be followed by reference to Fig. 3 or
4. This diagram shows the condition previous to the
initial closing of the breaker by means of the control
switch. The toggle unit 79X is shown in the reset
position, with the back contact (the reclosing contact)
closed and the front contact (the reset contact) open.
Fig. 6 shows the external connections when using
the two timer SGR-12.
The breaker is closed by the control switch
contact 10 1-C through the circuit consisting of the
52X coil and the cut-off relay 52Y back contact. When
52X contact closes, the closing coil 52C and the
operating coil 79X-O of the toggle element are ener
gized. Relay 79X performs its main function of open
ing the circuit to relay 52X so as to prevent a second
reclosure should the breaker immediately open. The
breaker closes and the toggle unit front contacts
79/X1 close, starting the 79M timer. If the breaker
has not been closed on a fault, the 79M timer contact
will close and the reset coil 79X-R will operate,
which closes the 79/X2 back contact in preparation
for an immediate reclosure should a subsequent fault
EFFECTIVE NOVEMBER 1965 www . El
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�o----1
Ill 4
""'----5
3 ---
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Fig. 1. Type SGR-12 Reclosing Relay Without Case. 1- Timer Contacts. 2-Reset Coil. 3-MotorResistor. 4- X1 Contact. 5 - Operating Coil. 6 - X3 Contact. 7 - X2 Contact.
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TYPE SGR-12RELAY __ ----------------------------------------------------�· ·�L�--4 1-- 6•6=3-�2A
LOWEI 1..11. CO.. TACT (F, �.)
FIOIIT TERM. FOR z .. v.o.c. All[) 120 V.A.C.
RUR TEIIM. fOR 168-U!iY,D.C. AIID21K!V,A.C.
lOTE-COMTACTS SHOWII Ill RESET POSITIOI
INTERNAL SCHEMATIC
RESET COl L L.�. COIL (F. V,)
OPEitATIIUi COIL R.K. COIL (F.Y.)
r--t---+----1--RESISTOR (21M� 'C.U. AS SIKIWM. SKOA.TEOOUT FOR120Y,A.t.)
TEST SWITCH
TUMIIAL
184A246
Fig. 2. Internal Schematic of the Type SGR-12 Relay in the Type FTJ J Case.
occur. As in the usual X-Y scheme, the closing of the
breaker through the auxiliary switch 52-aa operates
the breaker cut-off relay 52Y, which disconnects the
52X coil.
The breaker is now in the closed position with
the relay and control circuit de-energized. When a
fault occurs the circuit breaker is tripped open, and
the breaker auxiliary switches 52bb and 52LC are
closed. Due to the fact that- the 79/X2 back contact
is already closed, the closing cycle will take place
immediately. Should the breaker fail to stay in after
this one reclosure, it will have tripped out before the
79M timer has closed its contacts to reset the toggle
element, because the timer is always set for a longer
time than the sum of the protective relay and breaker
tripping times. In this case where the toggle element
is not reset, the breaker will not close again auto
matically because the 79/X2 contact to 52X is open.
To close the breaker it is necessary to use the con
trol switch 101-C.
Where a 52X make contact is not available from
the breaker for energizing the 79X-R coil, a separate
52X relay is required. A type MG-6 relay is recom
mended for this purpose. However, note that the
circuit breaker must provide a contact to seal around
the 79/X2 break contact to prevent the closing cir
cuit from being prematurely interrupted. This sealing
contact should close prior to the closing of the 52X
contact.
CHARACTERIS TICS
There are two type SGR-12 Reclosing relays
which are rated as follows:
Toggle Unit 1:::.
120-240 V 60 cycles or
24-125 v.d.c.
250 v.d.c.
Motor
120/240 V 60 cycles t
120/240 V 60 cycles t
t Motor coil resistor is by-passed for 120 volt opera
tion.
1:::. The toggle unit is supplied with tapped coils.
For 24 v.d.c. and 120 V 60 cycles, the upper ter
minals and lower front terminals are used(F.V.).
For 48-125 v.d.c. and 240 V 60 cycles, the upper
terminals and lower rear terminals. are used (F. V.).
* The timer has a max. setting of 92 seconds. The
small scale division is approximately 9 seconds
(normal setting is usually 9 to 18 seconds).
A timer is available where a reset time of less
than 10 seconds but more than 1 second is required.
Each of the 10 small scale divisions represents
approximately 1 second. Where a very accurate set
ting is desired, the time interval should be checked
with an electronic timer and the position of the back
stop adjusted for the exact time required.
The time for the contact arm to return to its ini
tial position after an operation is approximately 20%
or less of the closing time, with tli.e higher per cent applying to settings of one to two sc.ale divisions.
The reclosing contacts will carry 5 amperes
continuously. They will interrupt 3 amperes at 125
volts d-e in a non-inductive circuit or 30 amperes at
120 volts a-c.
INS TALLATION
The relays should be mounted on switchboard
panels or their equivalent in a location free from
dirt, moisture, excessive vibration, and heat. Mount
the relay vertically by means of the four mounting
holes on the flange for semi-flush mounting or by
means of the rear mounting stud or studs for projec
tion mounting. Either a mounting stud or the mounting
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TYPE SGR-12RELAY ______________________________________________________ ___
8
t-IIWEN SYM. SW. SUPERVISES 101/C COMTACT, AM EXTU 10 1/T CONTACT IS IEEDED AS SHOWN.
79 8 79 2 79
r 79 3 52
"' ..... ;:; ,... '-' 0 "'
.,: 0 � ....
DUlCE. IUIIBER CUlT 8 - COITIOL POWER SWITCH
U • AUTOMATIC OPERATION CUTOUT SW. 'ISS- SYICHRONl! IIG SWITCH 52 • CIR. BKR. AUX. SW.·OPEN
• WHEH BKR. IS OPEN 52 • CIR.BRK. AUX. SW.-CLOSEO
0 WHEN B�R. IS OPEH 52 - CIR. BKR. AUX. SW.·CLOSED •a IN OPER. POSITION 52 • CIR. BKR. AUX. SW,•OPEM bb IH OPEII. POSITION S2 - LATCH CNECK SWITCH LC 52- Clll. BU. CLOSING COIL
c S2 • 111(11. CONTROL RELAY
X 52 • BKR. CUTOFF RELAY
y 79 • �������=
1�ECLOS lNG RELAY,
79 • ThiER UNIT OF TYPE SGR-12 RELAY II
79 - OPERATING COIL OF TOilGLE X•O �NIT OF TYPE SGR-12 RELAY
79 - RESET COl L OF TOGGLE X·R UNIT OF TYPE SGR-12 RELAY
sg - BUS LOCKOUT RELAY
101 - COITROL SWITCH
184A952 """ Fig. 3. External Schemc;rtic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with DC Control.
screws may be utilized for grounding the relay. The
electrical connections may be made directly to the
terminals by means of screws for steel panel mount
ing or to the terminal studs furnished with the relay
for thick panel mounting. The terminal studs may be
easily removed or inserted by locking two nuts on the
stud and then turning the proper nut with a wrench.
For detailed FT case information refer to I.L.
41-076.
Before placing the relay in service, the motor
coil resistor should be shorted out when using 120
volt source.
ADJUS TMENTS AND MAINTENANCE
The proper adjustments to insure correct opera
tion of this relay have been made at the factory and
should not be disturbed after receipt by the customer.
If the adjustments have been changed, the relay taken
apart for repairs, or if it is desired to check the
adjustments at regular maintenance periods, the
instructions below should be followed.
4
CAUTION: Before energizi'TI{J the motor circuit check the resistor connection. The resistor is connected at the factory for 21/) volt a.c. service, arui shotdd be by-passed for 120 volt a.c. operation. Also, check toggle 'llfllit coil connections as described ti!IUier "Characteristics."
The contact travel of the timing unit determines
the time delay, which must be adjusted to meet the
requirements of the particular application. The bear
ing screw at the upper end of the last gear shaft is
used to clamp a stop for the contact arm in position.
The stop should be located so that the index mark on
the contact arm has the desired position with refer
ence to the scale, and the bearing screw then should
be tightened securely.
In case the synchronous motor should be removed
from its mounting plate, it should be reassembled so
that the mesh of the motor countershaft pinion with
its associated gear is about 2/3 of the depth of the
gear teeth. One of the motor mounting screw holes has
sufficient clearance to permit slight adjustment of
the gear mesh. In case the motor should be damaged,
the recloser should be returned to our Works for
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TYPE SGR-12RELAY ____________________________________________________ �1-�L�- �41�-6�6�3-�2A
t-IIIIEII SYI. SW. IUPEIY ISES 101/ C COIUCT, All EXTIA 10 1/ T COITlCT IS IEEDED lS SHOW.
DEY ICE IUMI£R CURT
8 • COITIOL POWER 811 TCH
•a · AIITUIClTIC OPEIITIOI CUTOUT SW. US· STICIIOIIZIH SWITCH �2 • CIR. Ill. AUX. SW.•OPEN
a WHEN BKR. IS OPEJI 52 • CIR. 8KR. AUX. SW.·C�OSED
b WHEN iKR. IS OPEN SZ • CIR. SKR. AUX. SW--C�OSED u IN OPEK. POSI liON
!iZ • CIR. SlR. AUX. sw.•OPEN bo IN OPER. POSITION !;2 • UTCK CHECK SfiTCH �c
52 • CIR. BKR. C�OSING COl� c
!iZ • 8KR. CONTRO� RE�AY X
!;2 • BKR. CUTOFF REUY y
79 • AuTOMATIC REC�OSING REUY, TYPE SGR-12
79 · TIMER UNIT Of TYPE SGR•12 REUY M
79 • OPERA Tl NG CO I� Of TOGG�E X·O UNIT Of TYPE SGR·12 REUY 79 • RESET COJ � Of TOGG�E X·R UNIT Of TYPE S6R·12 REUY a: " BUS LOCKOUT RELAY
101 • COITIOL Sll TCH
184A953
Fig. 4. External Schematic of the Type SGR-12 Relay for Immediate Rec/osure of a Breaker with AC Control.
repair, or a complete replacement motor should be
installed.
If the SX Toggle Unit has been dismantled, it is
necessary to check the toggle action and the contact
follow after reassembling it. Set the gap between the
lower pole pieces at 11/64". The contact follow
should be set at .037". This may be obtained by
adjusting the stationary contacts to just make when
there is an .020" gap between the residual pin in the
armature, and the upper pole pieces. The adjusting
screw assembly should be pushed down until there is
enough tension to cause the residual pin to rest
against the pole piece. With the lock nut tightened,
adjust the adjusting screw until there is equal toggle
pressure on each side. This may be done mechanically
with a gram gage and should be 58 grams when mea
sured between the rivits of the moving contact. This
may also be done electrically by energizing the
coils. If correctly adjusted, the unit will operate
without chattering at 80% rated voltage.
All contacts should be cleaned periodically. A contact burnisher S1t182A836H01 is recommended for
this purpose. The use of abrasive material for clean
ing contacts is not recommended, because of the
danger of embedding small partiCles in the face of
the soft silver and thus impairing the contact.
RENEWAL PARTS
Repair work can be done most satisfactorily at the factory. However, interchangeable parts can be
furnished to the customers who are equipped for
doing repair work. When ordering parts, always give
the complete nameplate data.
ENERGY REQU IREMENTS
The timer motor current is approximately 23 milli
amperes at rated voltage, and at 120 volts the burden
is 2. 75 v .a. The toggle unit coils of the recloser
rated at 120-"240 v.a.c. and 24-125 v.d.c. have the
following burdens:
24 VDC
48 VDC
125 VDC
120 VAC
240 VAC
12.5 watts
15 watts
100 watts
140 VA open gap - 130 closed
80 VA open gap - 65 closed
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TYPESGR-12RELAY _________________________________________________________ _
� 0 > 10 N
6
79
$,' 9 R
79 M I •
79 4
LOWER R.M. COITACT( F. Y. )
LOWER L.H. -------r-COITACT (F.Y.)
REAR TEIIII. FOR 111·125 v.o.c. AID 2110 J.A.C.
RESISTOR (2110 Y.A.C. AS • SNOWII, SHOIT OUT FOR 120 J.A.C.)
INTERNAL SCHEMATIC
RESET COIL L.H. COIL (F.Y.)
OPERAT 116 COIL R.N. COIL (F.Y.j
UPPER R. H. COITACT (F.Y.)
UPPER L.H. COITACT (F. Y.)
TIMER UIITS
LOWER
185A559 * Fig. 5 Internal schematic of the Type SGR-12 Relay
with two timing units.
DEVICE N U MBER CHART
79
L 8 -CONTROL POWER SWITCH TO 43 -AUTOMATIC OPERATION CUTOUT
435- SYNCH.RONIZ lNG SWITCH 52 -CIR.BKR.AUX.SW.-OPEN
a. WHEN BKR. IS OPEN 52 101 52 -CIR .BKR.AUX. SW.- CLOSED X
r 4:S
X 43 b WHEN BK R.IS OPEN 52 - CIR.BKR. AUX. SW.- CLOSED a.o. IN OPER. POSITION
t 52 - CIR.BKR.AUX.SW.- OPEN bb IN OPER. POSITION
52 -LATCH CHECK SWITCH LC
en 52 -CIR. BKR. CLOSING COIL w ..J c (.) >- 52 -BKR. CONTROL RELAY
79 79 (.) X XI X4 0 52 -BKR. CUTOFF RELAY c/) y
sw.
79 79 > 79 -A UTOMATIC RECLOSING RELAY 0
79 7
t- WHEN SYN. SW. SUPERVISES 101/C C ONTACT, AN EXTRA 101/T CONTA CT IS N EE DED AS SHOWN .
Ml
5 2 a.
M2 '<t N
52 b
TYPE SGR-12 79 -TIMER UNIT OF TYPE SGR -12 M REL AY 79 -OPER ATING C O IL OF TOGGLE
X-0 UNIT OF TYPE SGR-12 RELAY 7 9 -RESET COIL OF TOGGLE
X-R UNIT OF TYPE SGR-12 RELAY 86 -BUS LOCKOU T RELAY
B 101 -�ONTROL SWITCH
185A571 Fig. 6 External Schematic of the Type SGR-12 Relay with time delay on reclosing.
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TYPE SGR-12RELAY _______________________________________________________________________________________________________________________________ �•�.L�·�4 �1-6�6�3.�2
TEIIMIIIAL MD NOUIITIIIG-DETAILS
.190-32 SCREW
5 - 18 SCREW 16 (FOil TIIICK PANEL USE
�18 STUD) 16 .190-32 SCREW
9 Te
I
{ 91L ;- DIA.IJ MOLES FOR
5 - .. • 190-32 MTG.SCREWS
2 �� � 32 �
t -------,-
PAIIEL CUTOUT & ORILLIIIG FOit SEMI-FLUSH MTG.
P:LOT PLATE 51./�P} ON R.ELA.Y (TAB WHEN USED TO RE.A.R..)
lo4---"".,..------- sl ----1w 8
PANEL DRILLING 011 CUTOUT FOR PIIOJfCTION MTG.
(FIIOIIT VIEW)
TERMINAL NUMBER
57-D-7900
* Fig. 7. Outline and Drilling Plan for the Type SGR-12 Relay in the Type FT11 Cose.
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�··
WESTINGHOUSE ELECTRIC CORPORATION RELAY-INSTRUMENT DIVISION NEWARK, N. J.
Printed in U.S.A. www . El
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INSTALLATION Westinghouse t.L 41-663.2
• OPERATION • MAINTENANCE
INSTRUCTIONS
TYPE SGR-12 AUTOMATIC RECLOSING RELAY
c AuT 1 oN Before putting relays into service, remove
all blocking which may have been inserted for the
purpose of securing the parts during shipment, make
sure that all moving parts operate freely, inspect
the contacts to see that they are clean and close
properly, and operate the relay to check the settings
and electrical connections.
APPLICATION
The type SGR-12 Reclosing relay provides an
instantaneous reclosure of an electrically operated
circuit breaker, and automatically resets itself if the
breaker remains closed for a predetermined adjustable
time interval. If the breaker re-trips before the end
of this interval the resetting operation of the relay
is interrupted until the breaker is manually closed.
Thus the reclosing relay is applicable to either
attended or non-attended stations.
CONS TRUCTION AND OPERAT ION
The type SGR-12 relay consists of a synchronous
motor operated time-delay unit and a toggle unit.
The time-delay unit, consists of a 600 R.P.M.
(for 60 cycles) synchronous motor driving a contact
arm through a gear train. A bridging contact member
on the end of the contact arm closes a circuit through
two stationary contact studs at the end of the time
scale. The starting position, and length of travel of
the contact arm is determined by the position of an
adjustable stop, which can be set with reference to
a scale on the upper gear plate by loosening the upper
bearing screw of the last gear shaft and moving the
stop to the desired position. The time-delay for full
scale travel is approximately 92 seconds, and the
smallest scale division represents a delay of slightly
over 9 seconds.
When the motor is energized the armature is lifted
magnetically to a point where a pinion on the lower
NEW INFORMATION
end of the armature engages a gear on the motor
countershaft. When the motor is de-energized this
pinion de-meshes, and by this reduction of the re
setting load on the spring which is a part of the final
shaft assembly much faster resetting of the contacts
is obtained.
A resistor is connected in series with the motor
coil for 240 volt operation and by-passed for 120 volt
operation. The motor coil circuit is connected at the
factory for 240 ·volt service.
The toggle unit consists of two electromagnets,
with a common armature having two pins resting in a
groove in the molded base. The other end of the
armature is held in one of two positions by means of
a toggle spring which produces the toggle action. The
spring is protected by a lock pin which may be left
in after installation. The moving contacts are mounted
at one end of the armature and the stationary contacts
are mounted on either side.
The operation of the relay and related control
equipment may be followed by reference to Figs. 3 or
4. This diagram shows the condition previous to the
initial closing of the breaker by means of the control
switch. The toggle unit 79X is shown in the reset
position, with the back contact (the reclosing contact)
closed and the front contact (the reset motor contact)
open.
The breaker is closed by the control switch
contact 101-C through the circuit consisting of the
52X coil and the cut-off relay 52Y back contact. When
52X contact closes, the closing coil 52C and the
operating coil 79X-O of the toggle element are ener
gized. Relay 79X performs its main function of open
ing the circuit to relay 52X so as to prevent a second
reclosure should the breaker immediately open. The
breaker closes and the toggle unit front contacts
79/X1 close, starting the 79M timer. If the breaker
has not been closed on a fault, the 79M timer contact
EFFECTIVE JULY 1960 www . El
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... ._ . . .. · l -.t.:;.
•••• .1 .... • "•.M -M· ·-·· . .._,.
• 1
I Jl 4
r----5
3 ---4
)
Fig. 1. Type SGR-12 Reclosing Relay Without Case. 1- Timer Contacts. 2-Reset Coil. 3-Motor Resistor. 4- X1 Contact. 5 -Operating Coil. 6 - X3 Contact. 7 - X2 Contact.
)
6
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TYPE SGR-12RELAY ______________________________________________________ �t�.L�-�4�1-�66�3-�2
LOWER L.�. COMTACT(F,'I.)
fiiOftTTERM. FOR HY.O.C. AIIO 120'1.A.C.
RUR TERM. FOR �8-125 Y .D.C. AliD 2�0 'l. A.C.
UPPERR.II. CONTACT (F.Y.)
ltOTE-COIHACTS SHOWII Ill RESET POSITIOii
INTERNAl SCHEMATIC
----._RESET COIL L.H. COIL(f.'t.)
----..OPERATIMGCOIL R.H. COIL(F.'t,)
TIMER LIMIT
184A246
Fig. 2. Internal Schematic of the Type SGR-12 Relay in the Type FT11 Case.
will close and the reset coil 79X-R will operate,
which closes the 79/X2 back contact in preparation
for an immediate reclosure should a subsequent fault
occur. As in the usual X-Y scheme, the closing of the
breaker through the auxiliary switch 52-aa operates
the breaker cut-off relay 52Y, which disconnects the
52X coil.
The breaker is now in the closed position with
the relay and control circuit de-energized. When a
fault occurs the circuit breaker is tripped open, and
the breaker auxiliary switches 52bb and 52LC are
closed. Due to the fact that the 79/X2 back contact
is already closed, the closing cycle will take place
immediately. Should the breaker fail to stay in after
this one reclosure, it will have tripped out before the
79M timer has closed its contacts to reset the toggle
element, because the timer is always set for a longer
time than the sum of the protective relay and breaker
tripping times. In this case where the toggle element
is not reset, the breaker will not close again auto
matically because the 79/X2 contact to 52X is open.
To close the breaker it is necessary to use the con
trol switch 101-C.
Where a 52X make contact is not available from
the breaker for energizing the 79X-R coil, a separate
52X relay is required. A type MG-6 relay is recom
mended for this purpose. However, note that the
circuit breaker must provide a.contact to seal around
the 79/X2 break contact to prevent the closing cir-
cuit from being prematurely interrupted. This sealing
contact should close prior to the closing of the 52X
contact.
CHARACTERIS TICS
There are two type SGR-12 Reclosing relays
which are rated as follows:
Toggle Unit 6
120-240 V 60 cycles or
24-125 v.d.c.
250 v.d.c.
Motor
120/240 V 60 cycles t
120/240 V 60 cycles t
t Motor coil resistor is by-passed for 120 volt opera
tion.
6 The toggle unit is supplied with tapped coils.
For 24 v.d.c. and 120 V 60 cycles, the upper ter
minals and lower front terminals are used(F.V. ).
For 48-125 v.d.c. and 240 V 60 cycles, the upper
terminals and lower rear terminals are used (F. V.).
The timer has a max. setting of 92 seconds. The
small scale division is approximately 9 seconds
(normal setting is usually 9 to 18 seconds).
The reclosing contacts will carry 5 amperes
continuously. They will interrupt 3 amperes at 125
volts d-e in a non-inductive circuit or 30 amperes at
120 volts a-c.
INS TALLATION
The relays should be mounted on switchboard
panels or their equivalent in a location free from
dirt, moisture, excessive vibration, and heat. Mount
the relay vertically by means of the four mounting
holes on the flange for semi-flush mounting or by
means of the rear mounting stud or studs for projec
tion mounting. Either a mounting stud or the mounting
screws may be utilized for grounding the relay. The
electrical connections may be made directly to the
terminals by means of screws for steel panel mount
ing or to the terminal studs furnished with the relay
for thick panel mounting. The terminal studs may be
easily removed or inserted by locking two nuts on the
stud and then turning the proper nut with a wrench.
For detailed FT case information refer to I.L.
41-076.
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TYPE SGR-12RELAY __ __ __ __________________________________________________ __
79 6
79 7
t-1114EH SYI. SW. SUPEIVI SES 101/ C COITACT, All Em A 10 1/T COITACT IS IEEDED AS SHOWN.
79 8 79 2 79
r 79 3 52
a
"' .., <::; >-'-' 0 "'
,; � "'
DUlCE: IUIIIER CUlT
8 - COITIOL POWER SWITCH U - AUTOIIAllC OPERATION CUTOUT SW. 1135- SYICHROI1 Z 116 SWITCH 52 • Cl�. 8KR. AUX. SW.·OPEN
a II'HE14 BKR. IS OPEN 52 • C I R. BRK. AUX. Sill. -CLOSED
b WHEN BKR. IS OPEN o2 - CIR. BKR. AUX. SW. -CLOSEO u IN OPER. POSITION 52 • CIR. BU. AIIX. SW.•OPEM bb 114 OPEi. POSITION o2 • LATCH CMECK SWITCH LC 52 · CIR. BU. CLOSIMG COIL
c o2 • III(R. CONTROL RELAY
X 52 • BKR. CUTOFF RELAY
y 79 • ��������1�ECLOS lNG RELAY,
79 • TII4ER UNIT OF TYPE SGR-12 RfLAY 14
79 • OPERATING COIL OF TOilGLE X·O �NIT Of TYPE SGR-12 RELAY
79 - RESET COIL OF TOGGLE X·R UNIT OF TYPE SGR-12 RELAY
8� - BUS LOCKOUT REUY 101 - COITROL SWITCH
184A952
Fig. 3. External Schematic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with DC Control.
Before placing the relay in service, the motor
coil resistor should be shorted out when using 120
volt source.
A DJUS TMENTS A ND MA INTENANCE
The proper adjustments to insure correct opera
tion of this relay have been made at the factory and
should not be disturbed after receipt by the customer.
If the adjustments have been changed, the relay taken
apart for repairs, or if it is desired to check the
adjustments at regular maintenance periods, the
instructions below should be followed.
CAUTION: Before energizing the motor circuit check the resistor connection. The resistor is connected at the factory for 2¥J volt a.c. service, and should be by-passed for 120 volt a.c. operation. Also, check toggle 'lllflit coil crm:nections as described 'IJJIUier "Characteristics."
The contact travel of the timing unit determines
the time delay, which must be adjusted to meet the
requirements of the particular application. The bear-
4
ing screw at the upper end of the last gear shaft is
used to clamp a stop for the contact arm in position.
The stop should be located so that the index mark on
the contact arm has the desired position with refer
ence to the scale, and the bearing screw then should
be tightened securely.
In case the synchronous motor should be removed
from its mounting plate, it should be reassembled so
that the mesh of the motor countershaft pinion with
its associated gear is about 2/3 of the depth of the
gear teeth. One of the motor mounting screw holes has
sufficient clearance to permit slight adjustment of
the gear mesh. In case the motor should be damaged,
the recloser should be returned to our Works for
repair, or a complete replacement motor should be
installed.
If the SX Toggle Unit has been dismantled, it is
necessary to check the toggle action and the contact
follow after reassembling it. Set the gap between the
lower pole pieces at 11/64". The contact follow
should be set at .037". This may be obtained by
adjusting the stationary contacts to just make when
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TYPE SGR-12RELAY ____________________________________________________ �•·=L.�4�1-�6�63�.2
t-WMEII SYM. SW. SUPEIYISES 101/C COITACT, Ml EXTIA 101/T COITACT IS UEDED AS SHOW.
DEJI CE NUIIIER CURT
8 - COITROL POWER SWtTCH
•a - AUTUIIlTIC OPEilTlON CUTOUT SW. US- SJICIIDillllt SWITCH 52 • CIR. 8KI. AUX. SW.•OPEN
a WHEN 8KR. IS OPEN
52 • C IR. iKR. AUX. SW.·CLOSED b wHEN iKR. IS OPEN
52 • CIR. iKR. AUX. SW. ·CLOSEO aa IN OPER. POSI Tl ON 52 • C IR. B�R. AUX. sw.-OPEN bo IN OPER. POS ITION >2 • UTCH CHECK Slfl TCH LC
52 • C IR. BKR. CLOS ING COIL c
52 • BKR. CONTROL RELAY X
>2 • BKR. CUTOFF REUY y
79 - AUrllMATIC RECLOSING RELAY,
TYPE SGR-12 79 • TI .. ER UNIT OF TYPE SGR-12 RELAY
M
79 - OPERATING COIL OF TOGGLE X·O UNIT Of TYPE SGR-12 RELAY 79 - RESET COIL OF TOGGLE
X-R UNIT OF TYPE SGR-12 REU Y s: · BUS LOCKOUT RELAY
10 1 - COITROL SIITCH
184A953
Fig. 4. External Schematic of the Type SGR-12 Relay for Immediate Reclosure of a Breaker with AC Control.
there is an .020" gap between the residual pin in the
armature, and the upper pole pieces. The adjusting
screw assembly should be pushed down until there is
enough tension to cause the residual pin to rest
against the pole piece. With the lock nut tightened,
adjust the adjusting screw until there is equal toggle
pressure on each side. This may be done mechanically
with a gram gage and should be 58 grams when mea
sured between the rivits of the moving contact. This
may also be done electrically by energizing the
coils. If correctly adjusted, the unit will operate
without chattering at 80% rated voltage.
All contacts should be cleaned periodically. A
contact burnisher S#182A836HO 1 is recommended for
this purpose. The use of abrasive material for clean
ing contacts is not recommended, because of the
danger of embedding small partiCles in the face of
the soft silver and thus impairing the contact.
RENEWAL PARTS
Repair work can be done most satisfactorily at
the factory. However, interchangeable parts can be
furnished to the customers who are equipped for
doing repair work. When ordering parts, always give
the complete nameplate data.
ENERGY REQU IREMENTS
The timer motor current is approximately 23 milli
amperes at rated voltage, and at 120 volts the burden
is 2.75 v.a. The toggle unit coils Of the recloser
rated at 120-"240 v.a.c. and 24-125 v.d.c. have the
following burdens:
24 VDC
48 VDC
125 VDC
120 VAC
240 VAC
12.5 watts
15 watts
100 watts
140 VA open gap - 130 closed
80 VA open gap - 65 closed
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TYPE SGR-12RELAY ____________________________________________________ __
6
lkl1�G�1 :-rrf[JI f-- _§_ 'I�� , 16
+ - ··� ! - - - �-<t_ -lv 1'---+--'t--�- . I II I ., I 3 1 ·�
-:3� I ir ,1
���� � � P"'-NEL LOCATION \ I S'.::MI-FLUSH MT&.� \ PRCJ"ECT10N MTG. -----'
''<:JTE ·.ALL l'\MENSIONS IN INLi·lt::'S.
� 'DIA.. 4-HOI....ES FOR +,1.90-32. MIG-. SCREWS
PANEL CUTOUT � DR\LUNGrOR SEMI-FLIJ51-\ MTG.
�--------- 5� --�
't- !_�� ct, 7HOLE
I 4 - ·j -�--- i- . ��'2.- \ �c.--t
57-D-7900
Fig. 5. Outline and Drilling Plan for the Type SGR-12 Relay in the Type F T11 Case.
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WESTINGHOUSE ELECTRIC CORPORATION RELAY DEPARTMENT NEWARK, N. J.
Printed in U.S. A. www . El
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