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5.4 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the motor.
• The electrical installation must comply with applicable national and international
standards.
• Provide a lockable disconnect switch on the power line so that the machine is com-
pletely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1 for the motor.
• Make sure that the motor of the machine will not be affected by electric or electro-
magnetic disturbance from the mains; if necessary seek advice from Busch.
• Connect the protective earth conductor.
• Electrically connect the motor.
• Electrically connect the Variable-Frequency Drive (VFD), see Electrical Connection of
the Variable-Frequency Drive.
DANGER
Carry out any work on the variable-frequency drive and motor.
Risk of electrical shock!
• Electrical installation work must only be executed by qualified personnel.
DANGER
Maintenance work without disconnecting the variable-frequency drive.
Risk of electrical shock.
• Disconnect and isolate the variable-frequency drive before attempting any work on it.
High voltages are present at the terminals and within the variable-frequency drive for
up to 10 minutes after disconnection of the electrical supply.
• Always ensure by using a suitable multimeter that no voltage is present on any drive
power terminals prior to commencing any work.
NOTICE
The admissible motor nominal speed exceeds the recommendation.
Risk of damage to the machine!
• Check the admissible
motor nominal speed (n
max
) on the nameplate of the machine
(NP).
• Make sure to comply with it.
to get more information.
Summary of Contents for COBRA NX 0950 A
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