Electrical Connection | 6
Instruction Manual COBRA NX 0950 A WCV_EN_en
23 | 44
6.4
Start / Stop Connection
The following applies to machines equipped with an on-board variable speed
drive.
●
The Variable Speed Drive (VSD) is delivered with preset factory parameters. Please refer to the
specific wiring diagram supplied inside the variable speed drive.
●
For the connection of the control cables, install a cable in a bore hole at the terminal box (TB). Use
EMC cable fittings if required.
●
These parameters can be changed according to the specific document “Pump Control Instruc-
tions, art. no.: 0870208958”. Contact your local Busch agency or your Busch representative to
check if your machine is a custom or a standard one.
6.5
Wiring Diagram Three-Phase Motor (Pump Drive)
The following applies to machines not equipped with an on-board variable
speed drive and on which an external speed drive can be installed.
●
Make sure that you select the proper speed drive according to the motor specifications.
●
Connect the motor to your external speed drive according to the operating instructions of your
external speed drive.
●
Connect the motor cables as shown in the below wiring diagram.
Delta connection (low voltage):
Star connection (high voltage):
NOTICE
Incorrect direction of rotation.
Risk of damage to the machine!
●
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 illustration below:
