Siemens RL Instructions

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OPERATION
Page 8
In the CONNECTED position, the interlock will en-
gage the cubicle hole and reset, allowing the circuit
breaker to be closed. This prevents closing a circuit
breaker which is not in the CONNECTED position.
4. To withdraw the breaker from the CONNECTED posi-
tion, rotate the racking screw counterclockwise.
5. Before attempting to operate the circuit breaker, the
position of the device should be checked with refer-
ence to the holes in the cubicle, to be certain that it is
fully connected. Two stop nuts are provided on the
racking screw to set the connected position. These
are adjusted by setting the angle of the racking clevis,
as
shown in Figure 3, and by tightening the nuts
against the stop washer (109), the two nuts (110),
should be then locked against each other.
:( ·:z-: . -:. -~; ......... . ::::
: .. · ' :: t . · ... i To avoid damage to the racking mecha-
·= • :-:- .... w.-.:,:, .• :.;,:;:.:,:,:,,,:,:-:-:-
, ..
'
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nism, do not, when in the connected
position, rotate the racking crank clock-
wise.
105
109
110
' .
oD~
Figure 3. Detail of Typical Racking
Mechanism and Drawout Interlock
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SPRING DISCHARGE INTERLOCK
When racking the circuit breaker out to the DISCON-
NECTED position, the closing springs will automatically
discharge, at or before reaching the disconnect position.
The barrel nut engages the spring interlock. This, in turn,
is connected to the manual close hood which releases the
closing springs.
·-'-"''·.: ... ·t-iith: .... ,-:,., .... · ..
:cml-l)~N: On manually charged breakers, the
······-········-··-·························· close hood is interlocked to the manual
charge cam, and must be clear before
racking the circuit breaker to the DIS-
CONNECT position.
NOTE Manual charge handle must be in the vertical
position during racking. The racking mecha-
nism must be returned to the TEST position
before closing springs can be charged (either f ·
in the cubicle or when removed from the
cubicle).
Note also that the spring discharge interlock produces a
TRIP-FREE operation in which all of the stored energy of
the springs is dissipated in the mechanism. It is preferable
to turn the motor power off in the TEST position, close and
trip the circuit breaker normally in that position and then
rack out in the normal manner.
LIFTING BAR
DANGER
HEAVY WEIGHTS
The use of the lifting device will place heavy
weights overhead. Follow instructions for use.
Avoid excessive speeds and sudden starts and
stops.
Never lift a circuit breaker above an area
where personnel are located. Failure to comply
may result in property damage, serious personal
injury or death.
Figure 4 shows the standard lifting bar connection.
Courtesy of NationalSwitchgear.com

Siemens RL Specifications

General

Rated Voltage	250VAC, 30VDC
Mechanical Life	10, 000, 000 operations
Operating Temperature Range	-40°C to +70°C
Contact Configuration	SPDT
Contact Rating	10A
Electrical Life	100, 000 operations
Mounting Type	PCB