GE Industrial Solutions AMCB2GM, AMCB3GM User Manual

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Application

These instructions apply to bolt-on circuit breaker kits with catalog numbers AMCB3GM and AMCB2GM.

For use with circuit breaker types SGH, SGL, and SGP.

For use with circuit breaker cover kit AFP4SGS.

Replacement hardware kit: AHKBG1.

Installation

WARNING: Danger of electrical shock or injury.

OFF

Turn switchboard before workin e Equipment is to be installed and maintained b properly trained and qualified personnel only.

ower ahead of the panelboard or

inside the

ment or removing any component.

DEH060 Installation Instructions R04

Spectra Series™ Power Panelboards

Bolt-On Circuit Breaker Kits

Figure 1. Parts included in the kits AMCB2GM and AMCB3GM.

In the following instructions numbers in brackets in the text and figures refer to the items in Table 1.

1. Confirm the contents of the kit. These kits are used to install main and single-branch G-frame Spectra circuit breakers into Spectra APNB bolt-on–style interiors. The vertical space required for each kit is 5.50 inches (4X).

Figure 1 illustrates the parts included in this kit, which are listed in Table 1.

Item Part # Description

1 10083041P1 Terminal cover 1 1 2 192A6976P189 Thread-forming screw, #10-32 x 7/16"2 2 3 252B3576P1 Circuit breaker mounting bracket 1 1 4 252B3613P1 Antiturn clip 4 6 5 252B3618G13 G frame single strap 1 1 6 252B3618G14 G frame single strap 1 1 7 252B3618G15 G frame single strap 1 1 8 252B3657P1 Spacer 1 1

9 252B3657P2 Spacer 2 2 10 75A105503P101 Conical spring washer, 1/4"46 11 75A105503P105 Conical spring washer, 5/16"23 12 DEH060 Installation instructions 1 1 13 N22P23016B6 Hex-head bolt, 3/8-16 x 1" 2 3 14 N245P21B6 Nut, 1/4-20 4 6 15 N37P21060B6 Screw, 1/4-20 x 33/4"22 16 N402P11B6 Flat washer, 1/4"22 17 N657P21024B6 Carriage bolt, 1/4-20 x 11/2"46 18 N730BP1308B6 Thread-forming screw, #6 x 1/2"22

Table 1. Parts list for kits AMCB2GM and AMCB3GM.

Qty. in

AMCB2GM

Qty. in

AMCB3GM.

2. Locate the side of the interior with a 2.75-inch

prop

reference distance. The circuit breaker straps are mounted on the side of the panel interior bus at which the distance from the vertical bus face to the inner face of the bus-support rail is 2.75 inches, as indicated in Figure 2.

NOTE: If the breaker cable connection is on the same side of the interior as the 2.75" reference dimension, the cable connection is on the o

roceed with step 4. If

osite side of the interior as the 2.75" reference dimension, proceed to step 5.

NOTE: The following assembly views show the

2.75-inch distance on the ri reference distance is on the left, the

ht. When this

view is upside down.

Figure 2. Illustration of the 2.75-inch reference distance.

3. Assemble antiturn clips onto carriage bolts. Slide an antiturn clip [4] over the square shank of each carriage bolt [17], as shown in Figure 3. Figure 4 illustrates the installation of a bolt and antiturn clip onto the interior, as called for in the remaining steps.

When the breaker cable connection is on the same side as the 2.75" reference dimension of the interior, as illustrated in Figure 2, then only three each (for kit AMCB3GM) or two each (for kit AMCB2GM) of items [4] and [17] are used, with no spacers [8, 9]. When the cable connections are on the opposite side, then six each (for kit AMCB3GM) or four each (for kit AMCB2GM) of items [4] and [17] are used, along with spacers [8, 9].

4. Strap assembly procedure with cable connection on

the same side as the 2.75" distance. For single-phase

and dc applications using the bus closest to the bus support, go to step 4c. For single-phase and dc applications using the middle vertical bus and the vertical bus on the opposite side of the 2.75" reference, go to step 4e.

4a. For three-phase assembly (kit AMCB3GM).

Position the carriage bolt [17] and antiturn clip [4] assemblies as shown in Figures 5 and 6.

Edge of G

Frame

Edge of G

Frame

Figure 5. Carriage bolt and antiturn clip installation for three-phase

connections.

Figure 3. Assembling an antiturn clip [4] with a carriage bolt [17].

Figure 4. Installing a carriage bolt [17] and antiturn clip [4] into the

interior.

Figure 6. Carriage bolt and antiturn clip installation for three-phase

connections, isometric view.

4b. Install straps. Place the G frame single straps [5, 6,

7] over the carriage bolts and antiturn clips, as shown in Figures 7 and 8. Place conical washers [10] on the bolts and secure with nuts [14]. Leave the connections finger tight.

If the group assembly selection is three-phase, with the cable connections on the same side as the 2.75" reference dimension, and the assembly looks like Figure 8, then go to step 6.

Edge of G

Frame

Edge of G

Frame

Figure 7. Installing the straps for three-phase connections.

Figure 8. Installing the straps for three-phase connections, isometric

view.

4c. Connections to the outer bus of three-phase

interiors, with straps on single-phase interiors using this assembly. For applications using the

center bus go to step 4e. Position the carriage bolts [17] and antiturn clips

[4] as shown in Figures 9 and 10.

Edge of G

Frame

Edge of G

Frame

Edge of G

Frame

Edge of G

Frame

Figure 11. Installing the straps for connections to the outer bus of

three-phase interiors.

Figure 12. Installing the straps for connections to the outer bus of

three-phase interiors, isometric view.

Edge of G

Frame

Figure 9. Carriage bolt and antiturn clip installation for connections

to the outer bus of three-phase interiors.

Figure 10. Carriage bolt and antiturn clip installation for connections

to the outer bus of three-phase interiors, isometric view.

4d. Install straps. Place the G frame single straps [5,

7] over the carriage bolts and antiturn clips, as shown in Figures 11 and 12. Place conical washers [10] on the bolts and secure with nuts [14]. Leave the connections finger tight.

If the group assembly selection is for connections to the outer vertical bus with the cable connections on the same side as the 2.75" reference dimension, and the assembly looks like Figure 12, then go to step 6.

4e. Strap connections to the middle vertical bus and

the vertical bus opposite the 2.75" reference dimension.

Position the carriage bolts [17] and antiturn clips [4] as shown in Figures 13 and 14.

Edge of G

Frame

Figure 13. Carriage bolt and antiturn clip installation for single-phase

applications with connections to the middle vertical bus.

Figure 14. Carriage bolt and antiturn clip installation for single-phase

applications with connections to the middle vertical bus, isometric

view.

4f. Install straps. Place the G frame single straps [6,

7] over the carriage bolts and antiturn clips, as shown in Figures 15 and 16. Place conical washers [10] on the bolts and secure with nuts [14]. Leave the connections finger tight.

If the group assembly selection is for connections to the outer vertical bus with the cable connections opposite to the 2.75" reference dimension, and the assembly looks like Figure 16, then go to step 6.

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