5 | Installation
22 | 44
Instruction Manual COBRA NC 0400 B WCV_EN_en
●
Provide a lockable disconnect switch on the power line so that the machine is completely 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 electromagnetic
disturbance from the mains; if necessary seek advice from Busch.
●
Connect the protective earth conductor.
●
Electrically connect the motor.
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.
●
NOTICE
The motor frequency is below 20 Hz.
Risk of damage to the machine!
●
The motor nominal speed must always be higher than 1200 min
-1
(20 Hz).
NOTICE
Incorrect connection.
Risk of damage to the motor!
●
The wiring diagrams given below are typical. Check the inside of the terminal box for motor
connection instructions/diagrams.
5.7.1
Wiring Diagram Three-Phase Motor (Pump Drive)
Delta connection (low voltage):
Star connection (high voltage):
