ABB ACS880-37 Hardware Manual Download

Page: 148 / 282

Action

Safety

WARNING!

Obey the safety instructions during the start-up procedure. See chapter

Safety instruc-

tions (page 15)

Checks/Settings with no voltage connected

Ensure that the disconnector of the supply transformer is locked to the off (0) position, ie. no voltage
is, and cannot be connected to the drive inadvertently.

Check that the switch fuse (frame R8) (Q1) or main switch-disconnector (frame R11) (Q1) is switched
off.

Check the mechanical and electrical installation of the drive. See

Installation checklist of the

drive (page 145)

Check the settings of breakers/switches in the auxiliary circuits. See the circuit diagrams delivered with
the drive.

Check the tap settings of transformers T21 (standard) and T101, T111 (if present). See

Settings the

voltage range of auxiliary voltage transformers (page 109)

Disconnect any unfinished or uninspected auxiliary voltage (115/230 V AC) cables that lead from the
terminal blocks to the outside of the equipment.

Check that both channels of the Safe torque off circuit connected to the STO inputs of drive control
unit are closed. Refer to the wiring diagrams delivered with the drive.

If the Safe torque off functionality is used, check that the STO OUT output on the inverter control unit
is chained to the STO inputs of all inverter modules.

If the Safe torque off functionality is not used, check that the STO input on all inverter modules is correctly
wired to +24 V and ground.

For drives with ground fault monitoring for IT (ungrounded) systems (Q954): Adjust the settings
of the ground fault monitor to suit the installation. See the circuit diagrams of the delivery and

IRDH275B

Ground Fault Monitor Operating Manual

by Bender (code: TGH1386en).

For drives with Pt100 relays ((n)L506):

• Check the connections against the circuit diagrams of the delivery.
• Set the alarm and trip levels of the Pt100 relays.

Set the alarm and trip levels of the Pt100 relay as low as possible based on the operating temperature
and test results of the machine. The trip level can be set, for example, 10 °C higher than what the
temperature of the machine is at maximal load in the maximum environmental temperature.

We recommend to set the operating temperatures of the relay, typically for example, as follows:

• 120…140 °C when only tripping is in use
• alarm 120…140 °C and trip 130…150 °C when both alarm and tripping are used.

Powering up the auxiliary circuit of the drive

Make sure that it is safe to connect voltage. Ensure that

• nobody is working on the drive or circuits that have been wired from outside into the drive cabinet
• the cover of the motor terminal box is in place.

Drives with a voltmeter (G334): Make sure that the circuit breaker of the measuring circuit (F5)
is closed.

Close the circuit breakers and/or fuse disconnectors supplying the auxiliary voltage circuits.

Close the cabinet doors.

Close the main breaker of the supply transformer.

Close the switch fuse (frame R8) (Q1) or main switch-disconnector (frame R11) (Q1). This will power
up the main circuit of the drive as well as the auxiliary voltage circuit.

Note:

Do not use excessive force. The switch fuse (frame R8) or main switch-disconnector (frame R11)

can only be closed when the main input terminals (L1, L2, L3) are powered.

148 Start-up