GE Industrial Solutions AMC3KM, AMC2KM User Manual

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WARNING: Danger of electrical shock or injury.

OFF

Turn
switchboard before workin

ment or removing any component. Do

e
not remove circuit
other component until the power is turned
OFF.

General

These instructions apply to the following catalog numbers:

• Circuit breaker modules AMC3KM and AMC2KM

• Circuit breaker frames TKM, THKM, TK4V, TKL4V,
SKHA, SKLA, and SKPA

ower ahead of the panelboard or

inside the

rotective devices or an

GEH5623 Installation Instructions R04

Spectra Series™ Power Panelboards

Circuit Breakers and Modules

Rail

Latch

Latch

Screw

Installation

1. Phase balancing for two-pole devices in three-phase

systems. To balance the panelboard load, remove the

screws on the appropriate bus clip, reposition the bus
clip as shown in Figure 1, then install and tighten the
screws to 27–32 in-lb.

A & C Phase
As Received

A & B Phase

B & C Phase

Figure 2. Preparing the circuit breaker module for installation.

3. Install the module. Latch one side of the circuit
breaker module. Release the rail latch. Pivot the
module onto the bus bars and engage the second
latch. Release the rail latch. Tighten the rail latch
screws to 25 in-lb as shown in Figure 3. Allow no space
between units except as noted for type SKPA circuit
breakers in the Caution below.

CAUTION: When a type SKPA circuit breaker is
to be mounted on a module ad
switch, leave a 1X (1
units. Use an APP1W
the opening.

3

/8") space between the

anel filler plate to close

acent to an ADS

Figure 1. Repositioning the bus clip to balance the load.

2. Prepare the breaker module. Loosen the latch lock
screws and fully retract the rail latches. Line up the
guide fingers on both ends of the module with the
notches in the panelboard interior rails, as shown in
Figure 2.

Latch

Screw

Figure 3. Installing the circuit breaker module.

4. Install the circuit breaker on the module.

a. TKM and THKM circuit breakers used as main

devices (lugs only on the ON side of the breaker).

Place the OFF side of the circuit breaker over the
stud posts, as shown in Figure 4. Fasten the breaker
to the module with the round-head screws, small
lock washers, and flat washers provided. Place the
contact blocks on the stud posts. Place spacer sleeves
onto the contact blocks and secure each with a hex
nut, small flat washer, and large lock washer. Secure
the straps to the contact blocks with hex-head bolts,
large flat washers, and large lock washers, as shown
in Figure 5. Tighten the screws to 35–50 in-lb and
the nuts and bolts to 200–250 in-lb.

Secure the barrier to the module base in front of
these connections with #10 self-tapping screws, as
shown in Figure 8. Tighten the screws to 25 in-lb.

b. TKL4V and TK4V circuit breakers used as main

devices (lugs only on the ON side of the breaker).

Place the OFF side of the circuit breaker over the
stud posts, as shown in Figure 4. Fasten the breaker
to the module with the round-head screws, small
lock washers, and flat washers provided. Place the
contact blocks on the stud posts and secure with hex
nuts, small flat washers, and large lock washers.
Secure the straps to the contact blocks with hex­head bolts, large flat washers, and large lock
washers, as shown in Figure 6. Tighten the screws to
35–50 in-lb and the nuts and bolts to 200–250 in-lb.

Secure the barrier to the module base in front of
these connections with #10 self-tapping screws, as
shown in Figure 8. Tighten the screws to 25 in-lb.

Round-Head

Screw &

Washers

Figure 4. Attaching the circuit breaker to the module.

Hex Nut

Large Lock

Washer

Small Flat

Washer

Stud

Post

Spacer
Sleeve

Large Flat

Contact

Block

Washer

Large Lock

Washer

Hex-Head

Bolt

Figure 5. Securing the contact block to the studs and straps.