Resistor Installation And Wiring; Contactor Protection Of Regen Supply Module - ABB ACSM1 Hardware Manual

Resistor installation and wiring

All resistors must be installed outside the regen supply module in a place where they
are cooled sufficiently, do not block the airflow to other equipment, or dissipate hot
air into the air inlets of other equipment.
WARNING! The materials near the braking resistor must be non-flammable. The
surface temperature of the resistor may rise above 200 °C (400 °F), and the
temperature of the air flowing from the resistor is hundreds of degrees Celsius.
Protect the resistor against contact.
The maximum length of the resistor cable(s) is 20 m (65 ft). For the connections, see
section

Contactor protection of regen supply module

It is highly recommended to equip the regen supply module 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 regen supply module 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
ACSM1
Power and control cable connection
L1 L2 L3
OFF
1 3 5
2 4 6
U2 V2 W2
on page 48.
1
2
13
3
ON
14
4
Resistor thermal switch
Θ
K1
85
Resistor braking