GE Industrial Solutions EntelliGuard G Arcing contacts assembly User Manual

Arcing contacts assembly

Arcing contacts are supplied with the Entelliguard breaker.

Fig A Fig B

Contact

gap

Table 1. Arc contact Catalog and Ratings

Envelope Size Catalog # TYPE

Envelope 1

G20HARC H type G20NARC S & N type G40MARC H & M types Envelope 2 G40NARC E & N types

Envelope 3 G64LARC

DEH-41390 Installation Instructions

EntelliGuard ® G Circuit Breaker Accessories

Arcing contacts assembly

Arcing contact assembly using cluster pliers:

WARNING: Before installing any accessories, turn the breaker OFF, disconnect it from all voltage sources, and discharge the closing spings.

AVERTISSEMENT: Avant d’installer tout accessoire, mettre le disjoncteur en position OFF, le déconnecter de toute tension d’alimentation , et décharger les resorts d’armement

1. Turn the breaker off and discharge the

closing springs by depressing the OFF and ON buttons in the sequence OFF-ON-OFF. Verify that the breaker OFF-ON indicator shows OFF on a green background and that the charge indicator shows DISCHARGE on a white background. If installing in a draw-out type breaker remove breaker from adaptor (cassette) before continuing.

2. The breaker should be safely isolated and

fully removed from the cassette (for drawout breaker)

3. Loosen the mounting screws of arc

chamber to the housings as shown in fig A

4. Lift the Arc chamber assembly as shown

in fig B.

5. Loosen the fixed arcing contact assembly

mounting screws as shown in fig C.

6. Inspect the arc plates & arcing contacts

and sides of the moldings for signs of wear or damage. Replace as necessary.

7. Close the circuit breaker & ensure the

contact gap between the fixed and moving arcing contacts is set to 2.5mm as shown in fig D

8. Tighten the three mounting screws of

fixed arcing contact to torque of 18-20Nm (13.3 - 14.8 ft-lbs)

9. Install the arc chamber assembly by

tightening the mounting screws to torque of 8 -10 Nm (5.9 – 7.4 ft-lbs)

These instructions do not purport to cover all details or variations in equipment nor, to provide contingency to be met in connection with installation, operation, or maintenance. Should further information be desired, or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to GE.

41 Woodford Ave, Plainville, CT 06062 www.geelectrical.com