BUSCH COBRA - Wiring Diagram Three-Phase Motor

Electrical Connection | 6
Instruction Manual COBRA NC 2500 B WCV_EN_en 21 | 52
● 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.
● 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.
● Connect the protective earth conductor.
● Electrically connect the motor.
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
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.
● Consult the Technical Data to get more information.
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 con-
nection instructions/diagrams.
6.2 Wiring Diagram Three-Phase Motor (Pump Drive)
Delta connection (low voltage): Star connection (high voltage):