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IL 33-K2C-3
B. Mount a Sensor Mounting Bracket to each side
of the Breaker Frame using the holes just
drilled and the (4) .250-20 × .500" bolts, (4) flat
washers, and (4) lock washers supplied.
C. Secure the Sensors to the Mounting Platform
using the (6) .250-20 × .500" bolts, (6) lock
washers, and (6) flat washers supplied.
NOTE:
It may be necessary to loosen the screws
holding the Grounding Contact (located
on the side of the Breaker Frame) in order
to properly position the Sensor on the
Phase 1 Breaker Stab. After Sensor is in
place retighten the screws holding the
Grounding Contact.
D. Slide the Sensor Assemblies over the bottom
Breaker Stabs. Be sure the Mounting Platform
is above the surface of the Sensor Mounting
Brackets. Do not secure the Sensor Mounting
Platform to the Mounting Brackets at this time.
E. Reinstall the bottom Finger Clusters (removed
in Step 2-B) using the original hardware.
F.
Mount the Sensor Mounting Platform to the
Sensor Mounting Brackets using the (4) .250-
20 × .500" bolts, (4) flat washers, and (4) lock
washers supplied.
STEP 13: CONNECTING THE SENSOR
HARNESS AND THE DTA HARNESS
Fig. 55 Securing the Sensor Mounting Platform
G. Rotate the Secondary Contact Bracket, loos-
ened in Step 2-A, to its original position. Se-
cure it by reinstalling the original top screws
and tightening the bottom screws.
Fig. 56 Overview – Installing the Sensor and DTA
Harness
A. Remove the 7-Point Terminal Block cover from
the left side of the Aux. CT Module.
B. Route the DTA Extension Harness between the
Trip Unit Assembly and the Phase 2 Arc Chute.
Connect the “+” wire of the DTA Harness to the
“OP” terminal of the 7-Point Terminal Block
and the unmarked wire to the “ON” terminal.
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