Delta PG-40 Specifications download pdf (Page 30)

VFD-B Series

3-17

10. Make sure that the power source is capable of supplying the correct voltage and

required current to the AC drive.

11. Do not attach or remove wiring when power is applied to the AC drive.

12. Do not monitor the signals on the circuit board while the AC drive is in operation.

13. For the single-phase rated AC drives, the AC power can be connected to any two of the

three input terminals R/L1, S/L2, T/L3.

Note: This drive is not intended for the use

with single-phase motors.

14. Route the power and control wires separately, or at 90

angle to each other.

15. If a filter is required for reducing EMI (Electro Magnetic Interference), install it as close

as possible to AC drive. EMI can also be reduced by lowering the Carrier Frequency.

16. 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.

17. When using a GFCI (Ground Fault Circuit Interrupt), select current sensor with sensitivity

of 200mA, and not less than 0.1-second detection to avoid nuisance tripping.

3.7 Motor Operation Precautions

1. When using the AC drive to operate a standard 3-phase induction motor, notice that the

energy loss is greater than for an inverter duty motor.

2. Avoid running a standard induction motor at low speed. Under these conditions, the

motor temperature may rise above the motor rating due to limited airflow produced by

the motor’s fan.

3. When the standard motor operates at low speed, the output load must be decreased.

4. If 100% output torque is desired at low speed, it may be necessary to use a special

“inverter-duty” rated motor.

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Delta PG-40 Specifications Page 30