GE Industrial Solutions EntelliGuard 800–2000 A Frames, 240–600 Vac Maintenance Manual User Manual

Page 39

EntelliGuard™ 800–2000 A Power Circuit Breakers

Chapter 7. Maintenance of Standard Parts and Assemblies

Figure 27. Primary disconnect removal and installation on EGS08, EGF08, and EGH08 breakers.

Primary Disconnect Installation on EGX08,

EGS16, EGF16, EGH16, EGS20, and EGF20

Breakers

1. Slide the main retainer over the stud.
2. Position each of the stud spacers, in turn, in the

holes in the stud and secure with the spring clips.

Note that the holes in the stud spacers are off center

and must be positioned with the hole toward the

back of the breaker to align with the holes in the

clips.

3. Set a pair of bow-tie spacers into one of the fingers,

place a retainer over the spacers to hold them in

position, then turn the subassembly over. Slide a

long bolt through the hole in the retainer and fin-

ger, then through the clip and stud spacer. Hold the

bottom finger subassembly in place.

4. Place a finger through the bolt from the top, then

place two bow-tie spacers in the finger and hold

them in position with a retainer.

5. Place a spring, bushing, and flat washer over the

bolt, then secure with the two nuts.

6. Repeat steps 3–5 for the other half of the pole.
7. The primary disconnect assembly on new breakers is

adjusted in the factory for a force of 85–105 pounds

on a

-inch-thick copper bar between the fingers.

This force range can be obtained after installation

of a new primary disconnect assembly by adjusting

the finger spacing as shown in Figure 29. Loosen

the lock nuts to obtain a spacing of 0.766–0.797

inch between the top of the upper retainer and the

bottom of the flat washer. Tighten the lock nuts.