5 | Installation
20 / 36
0870222540_NX0950A_WCV_-_IM_en
5.4.4 Wiring Diagram Three-Phase Motor (Pump Drive)
The following applies to machines not equipped with an on-board variable-frequency
drive (VFD) and on which an external frequency drive can be installed.
• Make sure that you select the proper frequency drive according to the motor specific-
ations.
• Connect the motor to your external frequency drive according to the operating in-
structions of your external frequency 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:
IN
• Jog the motor briefly.
• Watch the fan wheel of the motor and determine the direction of rotation just before
the fan wheel stops.
If the rotation of the motor must be changed:
• Switch any two of the motor phase wires.
Summary of Contents for COBRA NX 0950 A
Page 3: ...Table of Contents 0870222540_NX0950A_WCV_ _IM_en 3 14 EU Declaration of Conformity 33...
Page 34: ...Note...
Page 35: ...Note...
