Mandatory Circuit Protection - ABB ACS550-01 User Manual

ACS550 User's Manual

Mandatory Circuit Protection

The following setup is essential for safety – it interrupts the main supply in fault
situations involving chopper shorts:
• Equip the drive with a main contactor.
• Wire the contactor so that it opens if the resistor thermal switch opens (an
overheated resistor opens the contactor).
Below is a simple wiring diagram example.
Fuses
ACS550
Parameter Set-up
To enable dynamic braking, switch off the drive's overvoltage control (Set parameter
2005 = 0 (
L1 L2 L3
Off
1 3 5
2 4 6
U1 V1 W1
))
DISABLE
1
2
13
3
On
14
4
Thermal switch (standard in
Q
ABB resistors)
K1
233
Technical Data