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VFD-B Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
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CHAPTER 3 WIRING
DANGER
Hazardous Voltage
Before accessing the AC drive:
Disconnect all power to the AC drive.
Wait five minutes for DC bus capacitors discharge.
Any electrical or mechanical modification to this equipment without prior written
consent of Delta Electronics, Inc. will void all warranties and may result in a safety
hazard in addition to voiding the UL listing.
Short Circuit Withstand:
The rated voltage must be equal to or less than 240V (460V model is 480Volts) and the
current must be equal to or less than 5000A RMS. (the model of 40HP or above is 10000A
RMS)
General Wiring Information
Applicable Codes
All VFD-B AC drives except 015B21A, 015B23A and 075B23B are Underwriters
Laboratories, Inc. (UL) and Canadian Underwriters Laboratories (cUL) listed, and therefore
comply with the requirements of the National Electrical Code (NEC) and the Canadian
Electrical Code (CEC).
Installation intended to meet the UL and cUL requirements must follow the instructions
provided in “Wiring Notes” as a minimum standard. Follow all local codes that exceed UL
and cUL requirements. Refer to the technical data label affixed to the AC drive and the
motor nameplate for electrical data.
The "Line Fuse Specification" in Appendix B, lists the recommended fuse part number for
each B-Series part number. These fuses (or equivalent) must be used on all installations
where compliance with U.L. standards is a required.
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