Electrical Connection | 6
Instruction Manual COBRA NC 1000 B WCV_EN_en
19 | 40
●
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 30 Hz.
Risk of damage to the machine!
●
The motor nominal speed must always be higher than 1800 min
-1
(30 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):
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.
