Planning the electrical installation
69
Continuous motor cable shield or enlosure for equipment in the motor cable
To minimize the emission level when safety switches, contactors, connection boxes
or similar equipment are installed in the motor cable between the drive and the
motor:
• European Union: Install the equipment in a metal enclosure with 360 degrees
grounding for the shields of both the incoming and outgoing cable, or connect the
shields of the cables otherwise together.
• US: Install the equipment in a metal enclosure in a way that the conduit or motor
cable shielding runs consistently without breaks from the drive to the motor.
Implementing thermal overload and short-circuit protection
Protecting the drive and input power cable in short-circuits
Protect the drive and input cable with fuses or a circuit breaker as follows:
1. Size the fuses according to instructions given in chapter Technical data. The
fuses will protect the input cable in short-circuit situations, restrict drive damage
and prevent damage to adjoining equipment in case of a short-circuit inside the
drive.
2. Circuit breakers which have been tested by ABB with the drive can be used.
Fuses must be used with other circuit breakers. Contact your local ABB
representative for the approved breaker types and supply network characteristics.
The protective characteristics of circuit breakers depend on the type, construction
and settings of the breakers. There are also limitations pertaining to the short-
circuit capacity of the supply network.
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Distribution
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Input cable
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Drive module
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