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Instruction Leaflet IL15560C
Effective August 2011
IMPORTANT: The contacts are so designed and con-
structed that they should last for the life of the breaker,
unless applied in a highly corrosive atmosphere. If they
become oxidized or corroded the contact may be cleaned
by wiping the surface with a clean cloth dipped in carbon
tetrachloride or other chlorinated solvent. If badly cor-
roded, surface may be scraped lightly with a fine file to
restore low contact resistance.
ASSEMBLY
Before the trip unit can be installed in the breaker frame the conductors
K must be assembled to the trip unit with retaining screws and
lockwashers L. Insert conductors K through rectangular slots in the trip
unit from the load end. The conductors are interchangeableand may be
installed in any pole of the trip unit. Assemble screw and lockwasher L
in the holes in the bottom of the trip unit under each conductor. The
screw will extend through the laminated core and engage a hole in the
conductor.Tighten the screws on the lockwashers and the conductors
will be held loosely in place. The screws will prevent them from slipping
out of the slots. Thread the two screws C through the holes in the trip
unit bracket and center conductor. The screw shanks are undercut so
that both screws will be held captive in the center pole. The trip unit is
now ready to be installed in the breaker frame.
INSTALLATION
Position trip unit in the breaker frame per Fig. 1 and make certain that
the trip unit bracket pin sits in the slots in the frame mechanism as at E.
The 2 center screws C are held captive in the center pole of the trip unit
and are to be tightened first. Outside pole screws D are supplied with
the frame and trip unit. These screws are tightened last after those in
the center are securely tightened. Use a socket wrench for a final hard
tightening to make sure that all 6 screws are securely in place. Tighten
with a torque of 15 ft. Ibs. max.
4
EATON CORPORATION www.eaton.com
AB De-ion® Circuit Breaker
Type PB-DC (Mag. Only)
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