Electrical Connection | 6
Instruction Manual COBRA NC 0100-0300 B ACV_EN_en
23 | 48
●
Make sure that the power supply for the drive is compatible with the data on the nameplate of
the variable speed drive.
●
If the machine is equipped with a power connector, install a residual current protective device to
protect persons in case of isolation default.
●
Busch recommends installing a type B residual protective device suitable for the electrical in-
stallation.
●
If the variable speed drive is not equipped with a lockable disconnect switch, provide it on the
power line so that the machine is completely secured during maintenance tasks.
●
Provide an overload protection according to EN 60204-1.
●
Busch recommends installing a C-curve circuit breaker.
●
Connect the protective earth conductor.
●
Electrically connect the Variable Speed Drive (VSD).
NOTICE
The admissible motor speed exceeds the recommendation.
Risk of damage to the machine!
●
Check the admissible motor speed range, see Technical Data.
NOTICE
Incorrect connection.
Risk of damage to the variable speed drive!
●
The wiring diagrams given below are typical. Check the connection instructions/diagrams.
6.3
Wiring Diagram Three-Phase Motor (Pump Drive)
Delta connection (low voltage):
Star connection (high voltage):
Double star connection, multi-voltage motor
with 9 pins (low voltage):
Star connection, multi-voltage motor with 9
pins (high voltage):
