Sourcetronic ST600 - Page 40

Frequency Inverter ST600 Series High-Performance Multifunction VFD Installation Guide
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Figure 4-26 075G3–110G3
Sign
Terminal name
Function description
R, S, T
Main circuit power input
3PH AC input terminal, connect to the grid
U, V, W
VFD output
3PH AC output terminal, connect to the motor
(+)
Brake unit terminal 1/Brake
resistor terminal 1
(+) and (-) are connected with the terminals of brake
unit.
PB and (+) are connected with the terminals of brake
resistor.
(-)
Brake unit terminal 2
PB
Brake resistor terminal 2
PE
Grounding terminal for safe
protection
Each machine must carry two PE terminals and proper
grounding is required.
Note:
1. It is not recommended to use an asymmetrical motor cable. If there is a symmetrical grounding
conductor in the motor cable besides the conductive shielded layer, ground the grounding conductor
on the VFD end and motor end.
2. The brake resistor is an optional part.
3. Route the motor cable, input power cable and control cables separately.
4. "None" means this terminal is not for external connection.
5. When sharing the DC bus, the VFDs must be the same in power and must be simultaneously
powered on or off.
6. 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.