vfd igbt failure

Comprehensive Power Quality & Harmonic Audit Study with solutions in a large tyre manufacturing plant

Abstract: Large continuous process plants are increasingly resorting to use of non linear loads (NLL) such as DC drives, variable speed AC drives, UPS, increased electronic controls etc. to improve performance and productivity of their plants. The plant engineers are increasingly facing unfamiliar problems related to power quality (PQ) mainly problem of distortion of fundamental wave shape and associated effects.  

Solving DC motor, VFD drive failure; Enhancing production by 25%, and Slashing energy bill by 9%

Abstract:- An ACSR conductor manufacturing plant was facing high incidence of DC motor and AC VFD Drive Failure due to bad power quality and high harmonic distortion. The company is a world leader in non-ferrous metal industry. It manufactures ACSR conductors for HV and EHV power transmission and distribution lines. It had been facing a high incidence of operational problem across its plants A and B. It affected all electrical and electronic equipment with its conductor making process.

Problem of electrical blast from VFD Harmonic; and a methodology for troubleshooting and increasing productivity

Abstract - VFD Harmonic forced a power plant to shutdown due to power quality failure. Starting with drive tripping it blasted switch gear, bus bar & electrical panel. This IPP with a 25mw, 11kV, 50Hz power plant and 5000TCD sugar milling unit had completed its first anniversary without harmonic problem. But during 2nd year's operation, it started-off with a massive blast of a 6300A Air Circuit Breaker (ACB). It was at the incomer of an electrical panel. The 415V PCC panel was supplying to sugar plant's process load.