Replacement Parts
ITEMS
DESCRIPTION
EATON STYLE NUMBER
SPRING RELEASE COILS / SHUNT TRIPS
24Vdc
48Vdc
125Vdc / 120Vac
250Vdc / 240Vac
94C9525G16
94C9525G17
94C9525G18
94C9525G19
Component Replacement
otee:
N
Removal of shunt trip coil on a 29WR element.
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
Replacing The Spring Release Coil (Close Coil)
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 TB1 and TB2 and pull the wires
through the support bracket toward the close 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 the left) 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 terminal block. Connect wires to
terminal block TB1 and TB2. Install tie wraps to hold wire
bundle.
Mechanically and electrically test the circuit breaker and
hipot the secondary wiring.
WARNING
VERIFY CIRCUIT BREAKER IS OPEN, CLOSING SPRINGS ARE
DISCHARGED AND CONTROL POWER IS DISCONNECTED.
REFERENCE: THE SHUNT TRIP COIL IS THE COIL ON THE
RIGHT SIDE, LOOKING INTO THE CIRCUIT BREAKER, WITH
THE RED “PUSH TO OPEN” LABEL
Replacing The Shunt Trip Coil
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 TB3 and TB4 and pull the wires
through the support bracket toward the close 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 the right). 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.
Slide coil into the bracket.
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 terminal block. Connect wires to
terminal block TB3 and TB4. Install tie wraps to hold wire
bundle.
Mechanically and electrically test the circuit breaker and
hipot the secondary wiring.
9
EATON
| Visual Instruction Booklet Essentials | DST-2-VR - 18WR Element | May 2017
