GE Industrial Solutions EntelliGuard E Circuit Breaker User Manual

Page 10

EntelliGuard® E Circuit Breaker

DEH-41526

The trip unit measures current and protects the breaker by
providing instantaneous over current override protection.

The fascia has interface buttons and features for safety
locks.

The cassette consists of a mechanism which enables the
circuit breaker to be racked in and out, and houses the
interlocks.

The front panel on the cassette has three markings which
indicate whether the breaker is in the CONNECTED, TEST or
DISCONNECTED position.

Drawout Circuit Breaker Installation into the Cassette

1. Pull the lifting handles on both side walls of the circuit

breaker.

2. Attach the lifting bar between the two holes of the lifting

eyes as shown in Fig. 3.3.

Figure 3.3. Circuit Breaker Lifting

3. Remove any padlocks and keep the key in place for key

locks if applied from the racking panel of the cassette.

4. Ensure the cassette position indicator shows

DISCONNECTED and the racking handle is disengaged.

5. Ensure the cassette racking cams on both side walls of

the cassette are in the completely racked out position

as shown in Fig. 3.4.

Figure 3.4. Racking Drive in the DISCONNECTED Position

6. Pull out the cassette rails fully.

7. Lower the circuit breaker gradually so that the rollers

drop over the rails. Ensure the grooves in all rollers

straddle the rails as shown in Fig. 3.5.

Figure 3.5. Circuit Breaker Rollers Straddled on the
Loading Rails

Remove the lifting bar and push the circuit breaker into

the cassette until it reaches a positive stop (the racking

pins on the circuit breaker are engaged with the

racking cams of the cassette on both sides). The circuit

breaker is now in the DISCONNECTED position (Fig. 3.6).

Figure 3.6. Circuit Breaker in DISCONNECTED Position

9. Push back both the extended rails of the cassette to the

stowed position.

10. Close the circuit breaker cubicle door.
11. If the circuit breaker is CLOSED and the springs are

charged, press the OPEN button on the circuit breaker
fascia and ensure the circuit breaker contacts are open
(Fig. 3.7).

Figure 3.7. Setting the Circuit Breaker to OFF