Replacement Parts
ITEMS
DESCRIPTION
EATON STYLE NUMBER
SPRING RELEASE COILS / SHUNT TRIPS
(QUICK DISCONNECT)
24Vdc
48Vdc
125Vdc / 120Vac
250Vdc / 240Vac
3759A76G04
3759A76G01
3759A76G02
3759A76G03
SPRING RELEASE COILS / SHUNT TRIPS
(RING TERMINALS)
24Vdc
48Vdc
125Vdc / 120Vac
250Vdc / 240Vac
3759A76G14
3759A76G11
3759A76G12
3759A76G13
WARNING
VERIFY CIRCUIT BREAKER IS OPEN, CLOSING SPRINGS ARE
DISCHARGED AND CONTROL POWER IS DISCONNECTED.
REFERENCE: THE SPRING RELEASE COIL IS THE COIL ON THE
LEFT SIDE, LOOKING INTO THE CIRCUIT BREAKER, WITH
THE GREEN “PUSH TO CLOSE” LABEL. THE SHUNT TRIP
COIL IS THE COIL ON THE RIGHT SIDE, LOOKING INTO THE
CIRCUIT BREAKER, WITH THE RED “PUSH TO OPEN” LABEL.
Replacing Spring Release and Shunt Trip Coils
Cut 4 to 6 tie wraps that hold the wires that go between
the close and trip coils to the terminal block in the lower
right side of the mechanism.
Remove two wires from the terminal block (TB1 and
TB2 for the Spring Release Coil/Close Coil and TB3 and
TB4 for the Shunt Trip Coil) and pull the wires through
the support bracket toward the coil.
Remove the 5/16 x 3 ¼ in. hex head bolt, lock washer
and spacer that hold the coil in place. Be careful to
capture the two fiber insulating washers behind the coil.
otee:
N
The 5/16 x 3 ¼ in. bolt is made of silicon bronze for
magnetic purposes and must never be replaced with a steel
bolt.
Slide the coil out of its bracket (to its available open
side) and feed the wires through. Remove the metal
core from the center of the coil.
Install new wire markers on the new coil leads. Polarity
is not an issue.
Insert the metal core into the center of the new coil.
Fish the coil wires through the cut out and slide coil into
the bracket while gently pulling the leads.
Insert the bolt, lock washer and spacer and place the
two fiber washers on the bolt when it exits the coil
(one at a time and screw bolt into washers). Screw bolt
into threaded insert in bracket and tighten. Do not over
tighten!
Fish wires through to the terminal block. Connect wires
to terminal block (TB1 and TB2 for the Spring Release
Coil/Close Coil and TB3 and TB4 for the Shunt Trip Coil)
. Install tie wraps to hold wire bundle.
Mechanically and electrically test the circuit breaker and
hipot the secondary wiring.
Component
Replacement
Replacing the shunt trip coil on a 150VCP-W25 mechanism.
10
EATON
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Visual Instruction Booklet Essentials | 150VCP-W 25kA 1200A | January 2017