TYP E RC AU TOMATI C R E CLOSING RELAY
I.L. 4 1•661 A
SG
U
M
I
T
CUMULATI
VE lOCKOUT
(OPTIOMM.)
RUISTOR-TO IJE COft..
IIFCTED
FOil
z-.o
� . A .
C.
Oll: U!io V,O.C.,
OMLY
CONTACTS
DR!l4 0PERl.TED-
1,2,3,1!.,11!.
Xllllll - i,9,9A
Y UM1T- !io, t:., 7,lJ
SOLEMOID UMIT
RESl STOi-TO BE COM
�E�TEO
fiM
,NO I . A J
AKD !IT-PAS�£0 FOR
120 Y . A . C .
TIMIMG HOTOR
TE
S
T
S
i
lTC
tl
182A757
Fig. 2. Internal Schematic of the RC R elay, Without
Z
Unit, in Typ e FT32 C as e.
Y
Soleno i d U n it
The
Y
unit coil is located to the rear of the front
sub-base. When energized a plunger is attracted to
ward the rear of the relay against a spring. A micarta
disc on the front end of the plunger actuates contacts
Y5, Y6
and
Y7.
As the disc moves to the rear it re
leases the latch arm. When released the latch arm is
rotated counterclockwise by the tension of the moving
*
contact spring of contact
Y 1 3
and a small helical
spring. This rotation blocks the full reset when
Y
is
de-energized. Thus, the
Y
unit has three positions as
shown in Table I. The
Y
unit, is reset by the
#5
cam
on the timing drum, which rotates the latch arm clock
wise against the tension of the
Y 1 3
moving contact
spring.
UPPER SG
UMIT
_
CUMULATIVE
UlCKOUT
_
(OPTI OIIAL)
RESI STOR-TO ilE
__...-
COMMECT£0 FOR 4�0
V . A , C . OR l/t. V . u . C . ,
Ollll'
COMTACTS
DRUM OPERAT£1.1 -
L L , J , <I , l �
X. UM I T - 1!,!:1,\:I.I.
Y UN ! l - ) - 6 , 7 , 1 J
Z llM I T - 10. 11, 1.1.
LOWER SG UMIT
/
l.
.
10
FRONT VIEW
-
SOLEMOID UNIT
RESI STOR-TO ll£
COIIIIECTEO
FiJ� J.'«>
V.A.C. AIIO BY-PASSlO
FOR UO V
•
.t.C.
TI MIMG MOTOR
TEST SWITCii
T
E
R
foiiiiAL
l82A7S8
Fig. 3. Internal Schematic of the RC Relay, With
Z
Unit,
in Type FT32 C ase.
I n s ta nta neo u s
X
U n i t a nd O p ti o na1 C u m u l a t i ve Lo c k o u t
The X unit is a clapper type auxiliary relay sim
ilar to the type SG with two make contacts, X8 and
X9. The
X
unit also operates a ratchet mechanism ,
when supplied, t o count the number o f breaker opera
tions. After a preset number of counts the ratchet will
open the c umulative lockout contact, 9A. The ratchet
teeth are numbered so that remaining operations be
fore lockout can be visually determined. The relay
case cover must be removed to reset the ratchet.
I n s ta ntaneo u s
Z
U n i t (W h e n
T h e Z unit is a c lapper type auxiliary relay
(standard SG) with one make contact, Z lO, and make
break contacts , Zl l and Z 1 2 .
Tabl e I
Y U N I T CONTACT POSITIONS
PLUNGER
CONTACT POSITION
POSITION
Y5
Y6
Y7
Y 13
Reset
Closed
Open
Open
Closed
Latched and De-energized
Open
Open
Closed
(Intermediate )
Open
Energized
Open
Closed
Closed
Open
3
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Summary of Contents for RC
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