Delta Electronics VFD-G manual Mains power terminals R/L1, S/L2, T/L3

Chapter 2 Installation and Wiring

CAUTION!

Mains power terminals (R/L1, S/L2, T/L3)

„Connect these terminals (R/L1, S/L2, T/L3) via a non-fuse breaker or earth leakage breaker to 3- phase AC power (some models to 1-phase AC power) for circuit protection. It is unnecessary to consider phase-sequence.

„It is recommended to add a magnetic contactor (MC) in the power input wiring to cut off power quickly and reduce malfunction when activating the protection function of AC motor drives. Both ends of the MC should have an R-C surge absorber.

„Please make sure to fasten the screw of the main circuit terminals to prevent sparks which is made by the loose screws due to vibration.

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

„When using a general GFCI (Ground Fault Circuit Interrupter), select a current sensor with sensitivity of 200mA or above, and not less than 0.1-second detection time to avoid nuisance tripping. For the specific GFCI of the AC motor drive, please select a current sensor with sensitivity of 30mA or above.

„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 [+1, +2(+2/B1)] for connecting DC reactor

DC Reactor	DC Reactor
Jumper	Jumper
+1	+1
For 460V series, 20HP and below	For 460V series, 25HP and above

Revision July 2008, EG03, SW V1.06 2-9