Wiring Procedure Of The Main Circuit Terminals - Kruger Ecowatt Drive K120 Series Operation Manual

Ecowatt ® Drive K120 series
Terminal
L, N, R, T
PB, (+)
(+), (-)
U, V, W
PE
Note:
 Do not use asymmetrical motor cables. If there is a symmetrical grounding
conductor in the motor cable besides the conductive shielded layer, ground the
grounding conductor on the VFD and motor ends.
 Route the motor cables, input power cables and control cables separately.
 Kruger series VFDs cannot share the DC bus with CH series VFDs.
 When sharing the DC bus, the VFDs must be the same in power and must be
simultaneously powered on or off.
 In shared DC bus running mode, current balance on the VFD input side must be
considered during wiring, and equalizing reactors are recommended to be
configured.

3.2.3 Wiring procedure of the main circuit terminals

1. Connect the ground wire of the input power cable to the ground terminal (PE) of the
VFD, connect the input cable to the terminals R and T, and fasten them up.
2. Connect the grounding wire of the motor cable to the ground terminal of the VFD,
and connect the 3PH motor cable to the terminals U, V, and W, and fasten them up.
3. Connect the braking resistor and other accessories that are equipped with cables to
the specified positions.
4. Fasten all the cables outside of the VFD mechanically, if possible.
1PH AC input terminal, connected to the grid.
Connected to external dynamic braking resistor terminal
Input terminal of the braking unit or DC bus
3PH AC output terminal, connected to the motor in most
cases.
Grounding terminal for safe
grounding is required for each machine.
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Installation guidelines
Description
protection, and proper