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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.
Hex Nut
Large Lock
Washer
Small Flat
Washer
Stud
Post
Contact
Block
Large Flat
Washer
Large Lock
Washer
Hex-Head
Bolt
Figure 6. Securing the contact block to the studs and straps.
c. SKHA, SKLA, and SKPA circuit breakers used as
main devices (lugs only on the ON side of the
breaker). Place the contact blocks [8] on the OFF
side of the circuit breaker terminal pads and then
place the OFF side of the 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. Secure the
contact blocks with hex nuts, small flat washers, and
large lock washers. Secure the straps to the contact
blocks with hex-head 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 thread-cutting screws, as
shown in Figure 8. Tighten the screws to 25 in-lb.
d. All circuit breaker types except SKPA used as
branch devices (lugs only on the OFF side of the
breaker). Place the ON side of the circuit breaker
over the stud posts. Fasten the breaker to the
module with the round-head screws, small lock
washers, and flat washers provided, as shown in
Figure 4. Place the contact blocks on the stud posts.
Place spacer sleeves onto the contact block 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.
e. SKPA circuit breakers (only) used as branch devices
(lugs only on the OFF side of the breaker). Place the
ON side of the circuit breaker over the stud posts.
Fasten the breaker to the module with the roundhead screws, small lock washers, and flat washers
provided, as shown in Figure 4. Remove the
knockouts from the bottom lug cover, place the lug
cover over the straps, as shown in Figure 7, and
fasten according to the circuit breaker instruction
GEH-5592. 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
7. Tighten the screws to 35–50 in-lb and the nuts
and bolts to 200–250 in-lb.
Install the large top cover according to the circuit
breaker instruction GEH-5592.
Hex Nut
Large Lock
Washer
Small Flat
Washer
Stud
Post
Spacer
Sleeve
Contact
Block
Straps
Large Flat
Washer
Large Lock
Washer
Hex-Head
Bolt
Remove
Knockouts
Figure 7. Securing the contact block to the studs and straps for an
SKPA breaker used as a branch device.
Self-Tapping
Screw
This Side Toward
Circuit Breaker
Barrier
Figure 8. Attaching the barrier to the module base.
5. Wire the circuits. Refer to the label on the circuit
breaker for the proper tightening torque.
6. Filler plate kits. Install filler plate kit AFP6SKS for
AMCSKM and AMC2KM modules.
Attention – Procedure for Aluminum
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Terminations
1. Strip the insulation, being careful to not nick the wire.
2. Clean the wire strands with a wire brush.
3. Thoroughly coat the stripped conductor with a
suitable antioxidant compound, such as ALNOX or
PENETROX A13.
4. Insert the conductor and tighten the connector screw
to the torque indicated on the rating label.
These instructions do not cover all details or variations in e
ma
be met in connection with installation, operation, or maintenance. Should further information be desired or should
articular problems arise that are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the
GE Company.
ment nor do they provide for every possible contingency that
GE Industrial Systems
General Electric Company
41 Woodford Ave., Plainville, CT 06062
GEH5623 R04 0701 © 2001 General Electric Company
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