Auxiliary Switch - GE AK-1-15 Instructions Manual

Air Circuit Breakers Type AK-1-15 and AK':'1-25 GEH-la07
AUXILIARY SWITCH
FIGURE 13
The auxiliary switch is mounted on the left side
of the operating mechanism. The main shaft (17),
Fig. 11, of the breaker causes crank (4), Fig. 12; to
rotate as the breaker opens and closes. The crank
operates the auxiliary switch shaft (3), Fig. 13 which
opens and closes the "a" and
''b''
contacts of the
switch. (The "a" contacts are open when the breaker
is open; the "b" contacts are closed when the breaker
is open). The opening and closing of the auxiliary
switch contacts is determined by an arrangement of
cams. (12), mounted on the auxiliary switch shaft
(3). The tOp terminals
of
the switch are "ai' con-
tacts, the bottom terminals are lib" contacts.
8. Moveb1e Qmtact
9. Oucll::et
10. Screw
U. Cloaiilt; Solenoid
12. matiOWl!')'
Contact
13. Inaubtion: Strip
9 10
1. Front Escutcheon
2. Retaine...
3. Braclret
4·. Rivet.
S.
Pum
Button
6~ Spring
7. Spacer
The stationary contacts (12) and insulation
strip (13) are attached to the closing solenoid by
bracket (9) and screws (10). A remote closing
switch may be used to close the circuit of the
solenoid control system, thereby energizing the
closing solenoid.
Adjustments
The closing switch· requires no attention, other
than
cleaning of contact occasionally.
SOLENOID CONTROL SYSTEM
This system consists of an X contactorand
Y relay (see Fig. 15) which are located on the left
side of the operating mechanislll' It also contains
a prop switch (25), Fig. 10, which is located in the
top front of the operating mechanism (looking from
the iront). The sequence of operation is as follows:
a. When the closing switch is closed, the coil
of the X contactor becomes energized.
b. The contacts of the X contactormake,
sealing its coil in and also energizing the
breaker closing coil. •
c. The breaker then closes and latches causing
the bb contact of the prop switch (25),
Fig. 10, to open thereby de-energizing the
X contactor coil and the breaker closing
coil.
NOTE:
If
the closing switch is closed while
the breaker is in the closed position, or
if
it re-
mains closed after the breaker closes. the coil of
CLOSING DEVICES
CONTROL'S
ELECTRICAL
AND
The electrical closing devices and controls
consist of the following:
a. Closing Switch
b. Solenoid Control System
c. Closing Solenoid
CLOSING SWITCH, FIG. 14
The closing switch is located in the lower right
hand corner of the front escutcheon (1).
A push button extends through the front escutch-
eon and is supported by bracket (3). Spring (6) re-
turns the push button to a neutral positibn after the
movable contact (8) has momentarily engaged the
stationary contacts (12). Two retainers (2) and
spacer (7) are used to hold the movable contact in
plat:e.
ADJUSTMENTS, FIG. 13
The contacts of any stage may be changed from
"a" to "b" or vice versa.
If
changes are desired in
the operation of the contacts, an approved drawing
of the cam (12) arrangement should be obtained or
a careful sketch made.
In
order to change an "a"
contact to a "b" contact, it is necessary to remove
the four tie bolts
~)
and change the position of the
particular cam 90 in relation to the shaft. Con-
tacts should be cleaned occasionally to insure prop-
er performance.
REPLACEMENTS, FIG. 13 '
1. Disconnect all leads to the auxiliary switch.
2. Remove mounting bolt (1) and screw (4) td
remove device from breaker. .
3.
If
no approved sketch of the cam arrange-
ment is available, remove the end plate (6)
froQ:!. the device by removing the four tie
bolts (2) and draw a sketch of the position
of the particular cam in relation to the shaft.
4. Before installing the new deVice, see that
the cams are in the same position as in the
device that is being replaced.
5. Install the new device in reverse order.
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