Principal Parts In A Manually Charged Spring Operated Mechanism - Eaton DS-206S series Instructions Manual

Instructions for Low Voltage Power
Circuit Breakers Types DS and DSL
With the breaker open and springs discharged, the motor
is energized through the limit switch (LS) and the "b" con-
tact. The green indicating lamp (G) is controlled by a sep-
arate "b" contact, and when lit indicates that the breaker
is open.
Motor runs and charges the closing springs.
When the springs are fully charged, limit switch (LS)
opens in the motor circuit and closes in the spring
release coil (SR) circuit.
When the close contact (CS-C) makes, the spring
release coil (SR) is energized through the normally
closed "Y" contact, the limit switch (LS), and breaker "b"
contacts. This releases the latch holding the stop roller
on the close cam.
Springs are released to close the breaker. When the
breaker closes, the "b" contact opens to cut off spring
Fig. 20 Principal Parts in a Manually Charged Spring Operated Mechanism.
Instruction Booklet IB 33-790-1J
release coil and motor, and limit switch (LS) contacts
reset.
If the close contact (CS-C) is maintained, the "Y" relay
will be picked up by the current through the SR coil, and
will open its "Y" contact in the SR circuit. This allows only
one close operation until the close contact (CS-C) has
been reset. The "Y" coil has a very low drop-out voltage.
On some circuit breakers a special closing circuit may be
provided which permits the closing springs to be auto-
matically recharged immediately after the breaker is
closed instead of only after the breaker is opened. This is
accomplished by separating the motor and limit switch
from the "b" contact so the motor operation is indepen-
dent of the position of the breaker contacts. This arrange-
ment makes the breaker suitable for use with
instantaneous reclosing relays or in special operating
sequences.
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Effective November 2010
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