6 | Electrical Connection
16 | 36
Instruction Manual PUMA WP 0250-2000 D_EN_en
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Make sure that the power supply for the motor is compatible with the data on the nameplate of
the motor.
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If the machine is equipped with a power connector, install a residual current protective device to
protect persons in case of isolation default.
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Busch recommends installing a type B residual protective device and adapted to the electrical
installation.
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Provide a lockable disconnect switch or an emergency stop switch on the power line so that the
machine is completely secured in case of an emergency situation.
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Provide a lockable disconnect switch on the power line so that the machine is completely secured
during maintenance tasks.
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Provide an overload protection according to EN 60204-1 for the motor.
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Busch recommends installing a D-curve circuit breaker.
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Connect the protective earth conductor.
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Electrically connect the motor.
NOTICE
Incorrect connection.
Risk of damage to the motor!
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The wiring diagrams given below are typical. Check the inside of the terminal box for motor
connection instructions/diagrams.
6.2
Wiring Diagram Three-Phase Motor
NOTICE
Incorrect direction of rotation.
Risk of damage to the machine!
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Operation in the wrong direction of rotation can destroy the machine in a short time! Prior to
start-up, ensure that the machine is operated in the right direction.
The intended rotation direction of the motor is defined by the specific instruction label stuck on the
machine.
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Jog the motor briefly.
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Watch the fan wheel of the motor and determine the direction of rotation just before the fan
wheel stops.
If the rotation of the motor must be changed:
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Switch any two of the motor phase wires.
Delta connection (low voltage):
Star connection (high voltage):