TERASAKI AME Series, Instruction Manual

Page: 21 / 40

KRB-5200h
-15-
4.2 External-Manual Operation
This section describes the AFB External Operating Handle which is to be installed on the
switchboard.
Warning

Open the ACB (set the external operating handle to the OFF position) to stop the generator
operation before opening the switchboard door.
Otherwise, touching a live part will cause electric shock.
Fig. 9
External Operating Handle
1) On operation
Caution

If the ACB trips open automatically, remove the cause before closing the ACB.
Otherwise, a fire could result.
To close the ACB, set the external operating handle to the ON [ I ] position.
Caution : When the ACB is equipped with the undervoltage trip device (UVT), the UVT coil must
be excited to permit the ON operation.
2) OFF operation
To open the breaker, set the external operating handle to the OFF [O]position.
Caution : If the main contacts are damaged (welded), the ACB cannot open. In this case, the
external operating handle will return to the ON [ I ] position when the handle is released at the
OFF position. Replace the ACB.
3) Tripping operation
When the overcurrent trip device (OCR), UVT, or shunt trip device (SHT) is activated, the ACB
trips open and the external operating handle m
oves to the “TRIP” position automatically.
RESET
OFF
TRIP
ON