Protection Of Frame Sizes R2 To R5 - ABB ACS800-U4 Hardware Manual

Protection of frame sizes R2 to R5

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.
Fuses
ACS800
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L1 L2 L3
OFF
1 3 5
2 4 6
V1
U1 W1
K1
1
2
13
3
ON
14
4
Thermal switch (stand-
Θ
ard in ABB resistors)
135
Resistor braking