GE Industrial Solutions Entellisys Installation User Manual

Page 54

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48

Entellisys Low-voltage Switchgear

Chapter 5. Installing and Removing Circuit Breakers

1.

Remove the primary disconnect assembly from the fuse

tang. This is accomplished by first loosening the two

keys (2), Fig. 5-14, via their holding screw and pulling

them upward and out. After the keys are removed, pull

the disconnect assembly off the end of the fuse tang.

NOTE: This removal does not disturb the disconnect's

clamping force adjustment.

NOTE: Ce retrait n’affecte pas l’ajustement de la force de

serrage du sectionneur.

2.

Remove the upper barrier (3).


3.

Detach the inboard end of the fuse by removing the two

½-13

NC bolts. A ratchet and socket with a short

extension will be required.


4.

Remove the fuse.


5.

Install the new fuse by reversing the disassembly

procedure. Ensure that the mating face of the fuse is

clean.

CAUTION: When replacing the fuse in the right pole

(plan view) of the breaker, note particularly that this fuse

is mounted differently from the other two fuses. As shown

in Fig. 5-15, for this phase the fuse is rotated 180 degrees

about its axis so that its inboard tang is positioned

beneath the breaker stud. This tang is offset with respect

to the opposite end, (Fig. 5-16), so that rotating the fuse

does not alter the position of the primary disconnect.

ATTENTION: Lorsqu’on procède au remplacement d’un

fusible dans le pole droit (vue de plan) du disjoncteur,

prendre note que ce fusible en particulier est monté

différemment des deux autres fusibles. Tel que montré à la

Fig. 5–15 pour cette phase le fusible est tourné de 180°

autour de son axe de façon à ce que son axe intérieur soit

positionné sous le plot du disjoncteur. Cette queue est

déplacée en tenant compte du bout opposé (Fig. 5–16),

pour que le fusible en rotation n’altère pas la position du

débranchement primaire.




Fig. 5-15. Plan view of EGF-16 breaker showing 2500-ampere fuse tang positions

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