ABB 5SHX1960L0004 SCR control unit module

Electrical safety

These warnings are intended for all who work on the drive, motor cable or motor.

WARNING! Ignoring the following instructions can cause physical injury or death, or

damage to the equipment:

• Only qualified electricians are allowed to install and maintain the drive.

• Never work on the drive, motor cable or motor when main power is applied.

After disconnecting the input power, always wait for 5 min to let the intermediate

circuit capacitors discharge before you start working on the drive, motor or

motor cable.

Always ensure by measuring with a multimeter (impedance at least 1 Mohm)

that:

1. voltage between drive input phases U1, V1 and W1 and the frame is close to

0 V.

2. voltage between terminals UDC+ and UDC- and the frame is close to 0 V.

• Do not work on the control cables when power is applied to the drive or to the

external control circuits. Externally supplied control circuits may cause

dangerous voltages inside the drive even when the main power on the drive is

switched off.

• Do not make any insulation or voltage withstand tests on the drive or drive

modules.

Note:

• The motor cable terminals on the drive are at a dangerously high voltage when

the input power is on, regardless of whether the motor is running or not.

• The brake control terminals (UDC+, UDC-, R+ and R- terminals) carry a

dangerous DC voltage (over 500 V).

• Depending on the external wiring, dangerous voltages (115 V, 220 V or 230 V)

may be present on the terminals of relay outputs (X2) or Safe torque off (X6).

• The Safe torque off function does not remove the voltage from the main and

Permanent magnet motor drives

These are additional warnings concerning permanent magnet motor drives.

WARNING! Ignoring the instructions can cause physical injury or death, or damage

to the equipment.

• Do not work on the drive when the permanent magnet motor is rotating. Also,

when the supply power is switched off and the drive is stopped, a rotating

permanent magnet motor feeds power to the intermediate circuit of the drive and

the supply connections become live.

Before installation and maintenance work on the drive:

• Stop the motor.

• Ensure that there is no voltage on the drive power terminals according to step 1 or

2, or if possible, according to the both steps.

1. Disconnect the motor from the drive with a safety switch or by other means.

Measure that there is no voltage present on the drive input, output or DC

terminals (U1, V1, W1, U2, V2, W2, UDC+, UDC-).

2. Ensure that the motor cannot rotate during work. Make sure that no other system,

like hydraulic crawling drives, is able to rotate the motor directly or through any

mechanical connection like felt, nip, rope, etc. Measure that there is no voltage

present on the drive input, output or DC terminals (U1, V1, W1, U2, V2, W2,

UDC+, UDC-). Ground the drive output terminals temporarily by connecting them

together as well as to the PE.