Delta Electronics AC Motor Drive VFD-VE Series User Manual
Page 30
Chapter 2 Installation and Wiring|
Revision August 2008, 03VE, SW V2.04
2-7
Mains power terminals (R/L1, S/L2, T/L3)
Connect these terminals (R/L1, S/L2, T/L3) via a no-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 leakage-current breaker to prevent leakage current,
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 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 on the shaft end of the motor) when a forward operation command is received. To
permanently reverse the direction of motor rotation, switch over any of the two motor
leads.
Forward
running
DO NOT connect phase-compensation capacitors or surge absorbers at the output
terminals of AC motor drives.
With long motor cables, high capacitive switching current peaks can cause over-current,
high leakage current or lower current readout accuracy. To prevent this, the motor cable
should be less than 20m for 3.7kW models and below. And the cable should be less than
50m for 5.5kW models and above. For longer motor cables use an AC output reactor.
Use well-insulated motor, suitable for inverter operation.
Terminals [+1, +2] for connecting DC reactor
+1
Jumper
DC reactor