Delta Electronics AC Drive VFD-F Series, User Manual

Page: 18 / 161

3
VFD-F Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
3-7
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)
„ If the AC drive is installed in the place where a load reactor is needed, install the filter
close to U/T1, V/T2, W/T3 side of AC drive. Do not use a Capacitor or L-C Filter
(Inductance-Capacitance) or R-C Filter (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] for connecting DC reactor
+1
Jumper
DC reactor
„ To improve power factor and reduce harmonics, connect a DC reactor between
terminals [+1, +2]. Please remove the jumper before connecting the DC reactor.