Siemens RL Instructions

MAINTENANCE
P_a_g_e_12-------------------------------J11., J....
MAINTENANCE CLOSING
NOTE H olding the spring release latch down pre-
vents the stored-energy springs from prop-
ping in the charged position . Thus , when the
handle is slowly returned to th e normal vertical
position , the energy in the springs is s lowl y
released
against the closing handle assembly .
During inspection prior to installation, and for routine
maintenance inspections , the circuit breaker contacts
may be closed slowly to check clearances , contact adjust-
ments , and movement of links and latches .
El
ectrica lly operated breakers do not have a manual
charging handle , but it is available as a maintenance item .
When
the hole in the charging handle assembly is aligned
with the holes in the operating mechanism frame, the pin
which is attached to the cam is inserted . This pin holds the
assembly in place and acts as a pivot point for the cam .
After insertion of the maintenance closing handle assem-
bly on the electrically operated breaker , the actual main-
tenance closing operations is the same for both the elec -
trically operated and the manually operated circuit
breaker . Refer to Table 3, Figure 5.
Figure
5. Maintenance Closing
ADJUSTMENTS
Dur in g mai ntenan ce inspe ct i on s, the fol l ow i ng items
should be checked to ensure that the original settings are
maintained :
Table 3. Maintenance Closing
Operation
Closing
Contacts
Opening
Contacts
Procedure
1. Verify
that racking mechanisms is in
TEST position .
2. Pull charging handle DOWN ALL THE
WAY (approximately 120° ).
3. Place
blade of screwdr iver between
hood and spring release latch and hold it
in DOWN position.
4. Slowly return handle to vertical posi-
ti on . Observe contact , touch , mechanical
operation, etc .
Push
in manual trip rod .
i Qi\OTJ /QN} Th e procedure in Table 3 should be used
·· ·········· for maintenance closing o nly . The cir-
cuit breaker must be outside of the cubi-
cle during any maintenance close opera-
tion. Mainta in a firm grip on the manual
charg i ng handle during the cl osing
stroke - the c ir cu it breaker may sud-
denly lat ch fully closed and apply unex-
pected force to the cha rgin g handle .
MAIN CONTACT MAKE
SEE FIGURE 6.
Compression of the contact fingers (46) must be between
.093" and .125" (2.4- 3.
2mm) . This is the difference in the
1)
measurement from the breaker base to the tip of the
finger contact surface when the breaker is open , 2) the
measurement in the same place when the breaker is
closed . This is checked with a normal closing operation -
not maintenance clos i ng . Adjustment is provided by posi-
tioning screws (78) after loo sening nuts (80 ). Counter -
clockw i se rotation of s crew s (78) increa ses co mpr ession.
Care
should be taken to reti ghten nuts (80) after adjust -
ment . If it is des ired to che ck co nta ct pr essure, a push-
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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