Resistor Installation And Wiring; Mandatory Circuit Protection; Parameter Set-Up - ABB ACS350 User Manual

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Resistor installation and wiring

All resistors must be installed in a place where they will cool.
WARNING! The materials near the brake resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. Protect the resistor against contact.
Use a shielded cable with the conductor size specified in section
terminal sizes, maximum cable diameters and tightening torques
short-circuit protection of the brake resistor connection, see
connection
cross-sectional area can be used. The maximum length of the resistor cable(s) is
5 m (16 ft). For the connections, see the power connection diagram of the drive on
page 38.

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.

Parameter set-up

To enable resistor braking, switch off the drive's overvoltage control by setting
parameter
Technical data
on page 297. Alternatively, a two-conductor shielded cable with the same
L1 L2 L3
Fuses
1 3 5
2 4 6
ACS350
U1 V1 W1
2005 to 0 (DISABLE).
Thermal switch of the resistor
Q
K1
Power cables:
on page 295. For
Brake resistor