Connecting Supply Power; Connecting The Supply Power; Input Circuit Requirements; Grounding - YASKAWA VS-616PS5 Series Quick Start Manual

3.2 Connecting the Power Supply

Input Circuit Requirements

The input power supply phases (L1, L2, and L3) may be connected in any sequence.
1. Circuit Breaker or Disconnect
2. Ground Fault Interrupter
3. Magnetic Contactors
4. Reactors and Transformers
5. Surge Suppressors

Grounding

The PS5 Controller must be grounded properly not only for safety, but also to insure proper operation.
1. Ground Resistance: 230 VAC class = 100 ohms or less 460 VAC class = 10 ohms or less
2. Never ground the VS-616PS5 in common with high current electrical equipment.
3. Do not use metallic conduit as a grounding conductor.
4. Size ground wires according to the "Wire and Terminal Screw Sizes" table in Appendix A.
5. The length of ground wires should be as short as possible.
6. When several units are used, do not loop ground wires.
VS-616PS5 Installation & Quick Start Manual
• The user must supply a circuit breaker or disconnect with properly sized fuses to protect the input wiring to
the VS-616PS5 inverter.
• Input currents to the inverters are listed in section 1.2.
• Recommended wire sizes are listed in the Wire Size Tables in Appendix A. Circuit Breakers and fuses must
be sized via the NEC standards according to the wire size.
• Select a ground fault interrupter not affected by high frequencies for use on the input.
• Example: NV Series by Mitsubishi Electric Company
• Example: EGSG series by Fuji Electric Co., Ltd.
• A magnetic contactor may be used as a disconnecting device on the input side of the
inverter. The user must still supply fuses to protect the wiring and a circuit breaker or
disconnecting device to remove power from the input side of the contactor.
• The VS-616PS5 may be started/stopped by closing/opening the magnetic contactor on
the power input; however, frequent operation may cause an inverter malfunction.
• When a magnetic contactor is opened on the input side, dynamic braking does not func-
tion and the motor coasts to a stop.
• When using a braking resistor unit, use an input side contactor to prevent damage to the
braking resistors in the event of a braking resistor overload.
• The use of reactors on the power supply side will improve the input side power factor.
• DC reactors may be connected to VS-616PS5 units 15 KW or less between the + 1 and
+2 terminals on the inverter (after removing factory installed shorting bar).
• AC reactors may be used on the input. They should not exceed 5% impedance.
• Transformers or reactors must be used with 15 KW units or smaller to limit instanta-
neous current of a mains power supply 600 KVA or larger.
• If power factor correction is used on the mains supply, a transformer or reactor must be
used to limit peak currents into the converter section of the drive.
• A surge suppressor must be used on the coil of an input contactor.
• Magnetic solenoids, valves, etc. must have surge suppressors across their inputs.
) Acceptable
(a
(b) Acceptable (c) Not Acceptable
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