Siemens RL Instruction Manual page 19

O peration
CC . . . . . Circuit Breaker
Closing Coil
TC . . . . . C ircuit Breaker
Trip Coil
Y
.
. .
. . . Aux. Closing
Relay-Anti-Pump
MCO . . . Motor Cutoff
Switch
88
. .
. .
. Spring Charging
Motor
...-
t
- - - - - - - - - - - - - -
Lf: 1r-- __,- - - - - - - ,
.
I Fuse
Control
Power
Supply
To manuaily open the circuit breaker, press in manual trip rod
(94). This bar engages the top of trip flap ( 1 2), to disengage
( 1 5).
the latch
Electrically Operated Circuit Breaker
•
The mechanism of the electrically operated circuit breaker is
the same as the manuaily charged circuit breaker, except that
the manual charg i n g handle is replaced by a motor and gear
system. Refer to Figure 2, and Table 2. Power available to
the control c i rcuit will start the automatic charging cycle. The
motor gear box p inion rotates gear
(82)
Cam follower engages an arm of win d and close cam
(34), which rotates the cams i n the same manner as for the
manua:ly charged c i rcuit breaker. When the wind and close
cam (34) reaches its charged position, the
engages switch lever (73), rotati n g the lever away from the
swit:h
operator. Gear switch lever (76) wi l l still be holding the
switch in the operate position and the '1lOtor will continue to
run until the roi! pins on the side of gear
8
CSC . . . Control Switch­
Close Contact
CST . . . . Control Switch­
Trip Contact
R . . . . . . Red Indicating
Lamp
G . . . . . Green Indicating
Lamp
:
r · ,
:
cs
! l
-.:_•,
C
� - ·
I
:
3.
Figure Typical Schematic-Electrically Operated
Diagra'1l Shows Breaker i n Discharged and Open Position
(81)
counterclockwise.
back
of the cam
(8 1 )
!:its iever (76)
a . . . . . . Aux. Switch­
b
MDS . . . Motor Circuit ON-O:=F Switch
CT . . . . . Tripping Transformer
STD . . . . Static Trip Device
- �
I - I
I
I
. 1, ,
.
. '
, .
C S
I
f;i') -
""""'
_ T
Q
rc
.. - �
2A -
-- 7
�, ¢
I .
2
,
_ _
Breakers
Table 2. Operating Procedures Electrically
O perated Circuit Breakers
Operation
Charging Energize control circu it.
Springs
Closing After springs are charged , actuate
remote close control switch (CSC).
O R
Push down firmly o n spring-release
latch hood
'
Tripping Actuate rer�ote tr:p control switch
(CST).
OR
Push in manual trip rod
Open when Breaker
is Open
. . . . .
. Aux. Switch­
Closed when
Breaker is Open
i
� ; �
Procedure
(50).
(94)