TERASAKI AME Series, Instruction Manual

Page: 10 / 40

KRB-5200h
-4-
3. INSTALLATION
3.1 Installing Rear-Connected ACB

For details of ACB mounting dimensions, see the catalogue.
Caution
(1) Installation work must be performed by competent persons.
(2) Prior to commencing any work on the ACB, stop the generator and open a disconnector or
the like to isolate all sources of power/voltage from both the primary and auxiliary circuits.
Otherwise, electric shock may result.
(3) When terminating conductors to the ACB, tighten terminal screws to the torque specified in
the following table.
Otherwise, a fire could result.

Terminal Screws and Tightening Torque Units in N·m
ACB type
Main circuit Auxiliary circuit
Terminal screw Tightening torque Terminal screw Tightening torque
AME3B, AME4B
AME6B, AME8B, AME10B
Hex. socket head
screw M12
40.2 - 65.7
Pan head screw
M3.5
0.88 - 1.18
(4) Be sure to bring the connecting conductors into close contact with the stud bars.
Otherwise, a fire could result.
(5) Avoid blockage of the arc gas vents to ensure adequate arc space (insulation distance).
Blocking the arc gas vents could prevent the ACB from tripping.
(6) Do not place the ACB in such an area that is subject to high temperature, high humidity,
dusty air, corrosive gas, strong vibration and shock, or other unusual conditions.
Mounting in such areas could cause a fire, non-tripping, or malfunction.
(7) Be careful to prevent foreign objects (debris, concrete powder, iron powder, etc.) and
rainwater from entering the ACB.
These materials inside the products could cause a fire or non-tripping.
(8) Use both hands to support the ACB
when mounting or dismounting it.
A heavy ACB, in particular, should
be held by two persons.
Dropping or toppling the ACB may
cause damage to it or personal injury.

ACB Mass (kg)
ACB type Manual operated Motor operated
AME3B, AME4B 6.5 11.2
AME6B 10 15.6
AME8B, AME10B 19.5 25.9
Fig. 1 Installation Example (AME4B with horizontal stud bar)

ACB Mounting Screws and Tightening Torque
ACB type Screw diameter Tightening torque N·m
AME3B, AME4B M8 11.8 - 18.6
AME6B, M10 22.5 - 37.2
AME8B, AME10B M8 11.8 - 18.6
ACB
Mounting screw
Mounting plate
Stud Terminal screw
Connecting
conductor
Mounting angle
(not supplied)
Stud