Delta Electronics AC Motor Drive VFD-EL - Manual (Page 31)

Chapter 2 Installation and Wiring|
2-10 Revision August 2008, 2ELE, V1.02
„ 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. For 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)
„ The factory setting of the operation direction is forward running. The method to control the
operation direction is to set by the communication parameters. Please refer to the group 9
for details.
„ 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 [+, -] for connecting brake resistor
„ All VFD-EL series don’t have a built-in brake chopper. Please connect an external
optional brake unit (BUE-series) and brake resistor. Refer to BUE series user manual for
details.
„ When not used, please leave the terminals [+, -] open.