Delta Electronics VFD-M manual Output terminals for main circuit U, V, W

Chapter 2 Installation and Wiring

„Please use voltage and current within the regulation shown in Appendix A.

„When using a GFCI (Ground Fault Circuit Interrupter), select a current sensor with sensitivity of 200mA, and not less than 0.1-second detection time to avoid nuisance tripping.

„Do NOT run/stop AC motor drives by turning the power ON/OFF. Run/stop AC motor drives by RUN/STOP command via control terminals or keypad. If you still need to run/stop AC drives by turning power ON/OFF, it is recommended to do so only ONCE per hour.

„Do NOT connect 3-phase models to a 1-phase power source.

Output terminals for main circuit (U, V, W)

„When it needs to install the filter at the output side of terminals U/T1, V/T2, W/T3 on the AC motor drive. Please use inductance filter. Do not use phase-compensation capacitors or L-C (Inductance-Capacitance) or R-C (Resistance-Capacitance), unless approved by Delta.

„DO NOT connect phase-compensation capacitors or surge absorbers at the output terminals of AC motor drives.

„Use well-insulated motor, suitable for inverter operation.

Terminals [B1, B2] for connecting external brake unit

Brake Resistor(optional)

Refer to Appendix B for the use of special brake resistor

BR

B2

„Connect a brake resistor or brake unit in applications with frequent deceleration ramps, short deceleration time, too low braking torque or requiring increased braking torque.

„The AC motor drive has a built-in brake chopper, you can connect the external brake resistor to the terminals [B1, B2] when needed.

„When not used, please leave the terminals [B1, B2] open.

Revision May 2008, ME14, SW V3.04 2-7