Specifications

VFD-B Series

3-16

3.6 Wiring Notes:

PLEASE READ PRIOR TO INSTALLATION.

1. There are corresponding ring terminals which will be included with each unit (20-30HP),

and please use the proper crimping tool by KST INC. P/N: KST-HDC38A for securing

the conductor.

CAUTION:

Do not connect the AC power to the U/T1, V/T2, W/T3 terminals, as it

will damage the AC drive.

WARNING:

Ensure all screws are tightened to the proper torque rating.

4. During installation, follow all local electrical, construction, and safety codes for the

country the drive is to be installed in.

5. Ensure that the appropriate protective devices (circuit breaker or fuses) are connected

between the power supply and AC drive.

6. Make sure that the leads are connected correctly and the AC drive is properly grounded.

(Ground resistance should not exceed 0.1

7. Use ground leads that comply with AWG/MCM standards and keep them as short as

possible.

8. Multiple VFD-B units can be installed in one location. All the units should be grounded

directly to a common ground terminal. The VFD-B ground terminals may also be

connected in parallel, as shown in the figure below.

Ensure there are no ground

loops.

Forward

running

9. When the AC drive output terminals U/T1, V/T2, and W/T3 are connected to the motor

terminals U/T1, V/T2, and W/T3, respectively, the motor will rotate counterclockwise (as

viewed from the shaft ends of the motor) when a forward operation command is received.

To reverse the direction of motor rotation, switch over any of the two motor leads.