Electrical Connection | 6
Instruction Manual COBRA NF 0750 A - NF 0950 A WCV_EN_en
19 | 44
●
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)
●
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.
NF 0950 A
Delta connection (low voltage):
Star connection (high voltage):
