ABB ACS180, Hardware Manual, Page: 60 / 168

• screwdriver or wrench with a set of suitable bits. For motor cable terminals,
the recommended screwdriver shaft length is 150 mm (5.9 in).
• short flat head screwdriver for the I/O terminals
• torque wrench
• voltage tester
• insulation resistance meter
• personal protective equipment.
Measuring the insulation
￭ Measuring the insulation resistance of the drive
WARNING!
Do not do any voltage withstand or insulation resistance tests on any part
of the drive as testing can damage the drive. Every drive has been tested for
insulation between the main circuit and the chassis at the factory. Also, there
are voltage-limiting circuits inside the drive which cut down the testing
voltage automatically.
￭ Measuring the insulation resistance of the input power cable
Before you connect the input power cable to the drive, measure its insulation
resistance according to local regulations.
￭
Measuring the insulation resistance of the motor and motor cable
WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or
death, or damage to the equipment can occur. If you are not a qualified
electrical professional, do not do installation, commissioning or
maintenance work.
1. Do the steps in section Electrical safety precautions (page 16) before you start
the work.
2. Make sure that the motor cable is disconnected from the drive output terminals.
3. Measure the insulation resistance between each phase conductor and the
protective earth conductor. Use a measuring voltage of 1000 V DC. The
insulation resistance of an ABB motor must be more than 100 Mohm (reference
value at 25 °C [77 °F]). For the insulation resistance of other motors, refer to
the manufacturer’s instructions.
60 Electrical installation