Siemens RL Instructions

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MAINTENANCE
MAINTENANCE
Occasional checking, cleaning and exercising of the cir-
cuit breaker will promote long and trouble-free service. A
periodic inspection and servicing, normally at intervals of
one year, should be included in the maintenance routine.
Circuit breakers located in areas subject to acid fumes,
cement dust, or other abnormal conditions, require more
frequent servicing. After a severe overload interruption,
the circuit breaker should be inspected. Refer to ANSI
Standard C37.16, Table 5 for recommended servicing
intervals.
The circuit breaker should not remain in either the closed
or open position any longer than six months. Maintenance
opening and closing operations should be made to ensure
freedom of movement of all parts.
A
suggested procedure to follow during maintenance
inspections:
A
DANGER
~
HAZARDOUS VOLTAGE
Do not work on energized equipment. Unautho-
rized personnel should not be permitted near
energized equipment.
Plan the time for maintenance with operating
personnel so that the switchgear can be de-
energized and safely grounded.
Failure to comply may result in property damage,
serious personal injury or death.
1. De-energize the primary and control circuits.
2. Rack circuit breakers to the disconnected position.
3. Remove circuit breaker from cubicle.
4. Remove arc chutes and examine for burned, cracked
or broken parts.
Page 11
To remove arc chutes, proceed as follows:
a. Remove mounting screws for holding clips, remove
bar and phase barriers.
b.
Lift arc chutes vertically to clear arc runners.
5. Wipe the contacts with a clean cloth saturated with a
non-toxic cleaning fluid.
6. Replace badly burned or pitted contacts. (See Con-
tact Replacement, Page 13, and Lubrication Instruc-
tions, Page 21.)
7. Wipe all insulated parts with a clean cloth saturated
with a non-toxic cleaning fluid.
8. Bearing pins and other sliding or rotating surfaces
should be cleaned and then coated with a light film of
grease. (See Lubrication Chart, Page 21.)
9. Charge the springs manually and maintenance close
to check latch and linkage movement. (Rotate racking
screw to the approximate TEST position to clear
spring discharge interlock before attempting to
charge closing springs.)
10.
Check circuit breaker adjustments. (See Adjustments,
Page 12.)
LUBRICATION
Lubrication should be a part of the servicing procedure.
Old grease should be removed from bearing pins and
other non-current carrying rotating or sliding surfaces.
They should be wiped with a thin film of petroleum-oil-
base precision-equipment grease, such as Beacon P-290
(Exxon).
Grease
with care to avoid getting grease on insulating
members, since it may affectthe dielectric strength. Faces
of arcing contacts should not be lubricated. The rubbing
surfaces of the main contact fingers and hinge contact
fingers are lubricated with a coating of Siemens-Allis con-
tact lubricant, 15-171-370-002. If dust has accumulated,
disassembly may be necessary to clean and relubricate
these points. See Contact Replacement, Page 13 and Lu-
brication Instructions, Page 21. ·
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