Protection Of Frame Sizes R2 To R5 (Acs800-01); Protection Of Frame Size R6 (Acs800-01) And; Frame Sizes R7 And R8 (Acs800-02 And Acs800-04) - ABB ACS800-U4 Hardware Manual

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Protection of frame sizes R2 to R5 (ACS800-01)

It is highly recommended to equip the drive with a main contactor for safety reasons.
Wire the contactor so that it opens in case the resistor overheats. This is essential
for safety since the drive will not otherwise be able to interrupt the main supply if the
chopper remains conductive in a fault situation.
Below is a simple example wiring diagram.
ACS 800
Protection of frame size R6 (ACS800-01) and frame sizes R7 and R8
(ACS800-02 and ACS800-04)
A main contactor is not required for protecting against resistor overheating if the
resistor is dimensioned according to the instructions. The drive will disable power
flow through the input bridge if the chopper remains conductive in a fault situation.
A thermal circuit breaker (standard in ABB resistors) is required for safety reasons.
The cable must be shielded and not longer than the resistor cable.
Resistor braking
L1 L2 L3
Fuses
1 3 5
2 4 6
U1 V1 W1
1
OFF
2
13
3
ON
14
4
Thermal circuit breaker
Q
(standard in ABB resistors)
K1