GE PVDB-28kV Instructions Manual page 8

Distribution Breaker Section 3. Descriotion
Mter using the emergency u'ip, the mechanism door
,
3-5 Emergency Trip
3-6 Control Circuit
A typical ML-18H mechanism wiring diagram is shown
in Figure 13. Check the wiring diagram supplied with
the actual circuit breaker for its wiring.
The mechanism mounted auxiliary switch contacts not
used in the control circuit are bought out for control
and indication functions. An additional mechanism
operated, housing mounted auxiliary switch can be
provided for additional contacts.
Figure 4. Low Voltage Compartment-Relay Side
8
must be opened and the lever reset manually to release
the tI'ip button,
A "Pull to trip" knob is provided on the outside of the
mechanism door for emergency tripping of the circuit
breaker. When the breaker is tripped by means of this
knob, a small lever on the front of the mechanism frame
is spring operated to hold the trip button depressed, so
that the trip latch cannot reset, and the breaker is
mechanically trip-free. The latch checking switch
(LCS) Fig. 14, is also held open so the closing coil
cannot be energized. Provision is made for padlocking
the lever in the operated position. As an option a key
lock can also be provided to hold the trip button
depressed, and a switch can be added for remote
indication of manual trip.