KRB-5404
36
4-2-2. Draw-out operation
DANGER
Never touch live terminal parts. Otherwise, electric shock may result.
Do not leave the ACB body in the removed position. The weight of the ACB may cause serious injury.
CAUTION
If the ACB has the breaker fixing bolts, be sure to loosen the bolts on both sides before draw-out operation. Otherwise,
damage to the ACB may result.
Make sure the draw-out cradle is secured with mounting screws before drawing out the breaker body. Otherwise, the draw-out
operation may cause the breaker body or the draw-out cradle to fall, resulting in damage to the ACB or personal injury.
When retracting the draw-out rail into the draw-out cradle, be sure to push the rail end. Do not hold the hook pin, body
stopper, or body stopper shaft. Doing so may cause your fingers to be pinched, resulting in injury.
Use the separate draw-out handle to draw-out the breaker body.
4-2-2-1. Moving the breaker body from the CONN. position to the TEST position
1) Open the ACB. (If the ACB remains closed, the draw-out handle (Fig. 29
◯
1
) cannot be inserted).
2) Loosen the breaker fixing bolts (Fig. 29
◯
2
), if used, to unlock the breaker body (Fig. 29
◯
3
).
3) Unlock the position lock lever (Fig. 29
◯
14
) if locked. See section 4-5.
4) Insert the draw-out handle into the draw-out handle insertion hole (Fig. 29
◯
4
). And slowly turn counterclockwise until the
handle cannot be turned. The position indicator (Fig. 29
◯
5
) shows “TEST”.
When the main circuit is disconnected at the disconnect contacts, the breaker body will be slightly pushed forward by the spring
action of the main circuit disconnect contacts. At this moment, a bang sound will be heard. This sound does not mean a
malfunction.
The ACB cannot be closed as long as the draw-out handle is in the draw-out handle insertion hole. To close the ACB e.g., for
ON-OFF testing, remove the draw-out handle.
Fig. 29 Draw-out and insertion operation
◯
7
Draw-out cradle
◯
3
Breaker body
◯
2
Breaker fixing bolt
◯
10
Grip
◯
4
Draw-out handle insertion hole
◯
1
Draw-out handle
◯
9
Draw-out rail
Hook pin
◯
8
Rail stopper
Com. terminal, manual connector
◯
15
ON-OFF indicator
◯
13
Position lock lever
◯
14
Position indicator
◯
5
Release button
◯
6
Auto-discharging device
◯
11
Body stopper
Body stopper shaft
Draw-out rail end
◯
12
Draw-out direction