TERASAKI AME Series, Instruction Manual

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KRB-5200h
-8-
3) Check to be sure that a mounting angle has sufficient strength to support the ACB mass.
Vibration, in particular, must be taken into account. Vibration of the switchboard could result in
false tripping of the ACB.
Be sure to avoid resonance.
4) Do not place the ACB in such an area that is subject to direct sunlight.
5) Clean the connecting surface.
It is recommended that the connecting surface of the connecting conductors be subject to
silver-plating or the like in order to reduce the contact resistance on the surface.
6) When applying the frame current continuously, use the connecting conductors whose size is
equal to or larger than shown below.
Otherwise, overheat could result.
ACB type AME3B AME4B AME6B AME8B AME10B
Frame current * 250 A 400 A 630 A 800 A 1000 A
Conductor size 150 mm
2
2 x 100 mm
2
2 x 50 x 5 2x 50 x 5 2x 60 x 5
*) At ambient temperature of 45
℃
7) Ensure adequate insulation distance (specified per your switchboard) from bare live parts of
terminals and connecting conductors to a mounting angle and bare live parts of other
components.
8) Secure the connecting conductors firmly using supporting means so that an electromagnetic
force caused by a large current flowing through the ACB or other harmful force does not directly
act upon the ACB plug-in mounting base terminals.
9) How to mount the ACB:
①
Open or trip the ACB before mounting it.
(This applies to dismounting.)
②
Install the ACB so that the ACB mounting bolts are inserted into the four mounting holes (with
cap nuts). (See Fig. 3.)
③
Tighten the four cap nuts gradually in diagonal order
Do not tighten a particular nut intensively.

Cap Nut Tightening Torque and Tool
ACB type Tightening torque N·m Tool
AME3B, AME4B 3.6 - 6.0 Flat-head screw driver
AME6B, AME8B, AME10B 8.8 - 14.7 Allen wrench (nominal size 8)