Replacement Of Closing and Tripping Solenoids (Devices
52SRC and 52T) - Replacement of either the closing or trip-
ping solenoids is straightforward. Each solenoid has two
mounting screws and one quick disconnect terminal. Re-
moving the mounting bolts and quick disconnect terminal
of the solenoid permits it to slide out and to be removed.
Replacement requires careful insertion of the solenoid and
re-attachment of the mounting bolts and quick disconnect.
Figure 31 shows the two screws which attach the close coil
and the quick disconnect terminal for control leads. The
trip coil arrangement is similar.
Figure 31.
Replacement of Closing Solenoid.
Replacement of Anti-Pump Relay (Device 52Y) - Figure 32
helps illustrate the anti-pump relay removal procedure. The
two nuts holding the relay and its mounting bracket are
removed. The wires connected to the relay should be
tagged and disconnected, the relay and bracket can then
be extracted and replaced.
Replacement of the Auxiliary Switch - Figure 32 shows the
auxiliary switch and its key mounting components. Two
mounting screws hold the switch to the mounting bracket.
First remove the quick disconnect terminals after marking
their position. The screw, washers and nut connecting the
switch operating lever to the operating shaft is removed,
and then the two mounting screws. Re-assemble in re-
verse order.
Replacement Of Opening Spring - The opening spring may
be removed and replaced without the need to use a spring
keeper or compression aid.
The opening spring assembly consists of the top and bot-
tom spring caps, threaded coupling rod with nuts, and a
supporting shelf. The shelf features location holes and tabs
which work in concert with supports in the breaker frame
to secure the shelf.
An adjustable crescent wrench allows an easy means of
grasping the shelf and depressing it slightly to disengage
the tabs in the shelf locating holes. With the tabs disen-
gaged, and grasping the bottom of the spring, the whole
assembly can be pulled forward.
A reversal of this procedure allows re-assembly. Note that
there should be at least two threads of the coupling rod
visible above the jackshaft rod attachment (with jam nut
tightened). After the opening spring assembly is reinstalled,
the opening spring length should be adjusted to be 6.125”.
This measurement is taken between the supporting shelf
and the bottom of the lower spring cap (Figure 30).
When re-assembling, apply downward pressure to the shelf
under the stationary support to engage the shelf tab guides.
The shelf may then be guided into place.
Overhaul
Figure 30.
Removal of opening spring.
2098-98
32
Mounting
Bolts
Quick
Disconnect
