GE SERIES B 480 user manual TROUBLESHOOTING - continued, phases at full load, Problem

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GE Capacitor & Power Quality Products

TROUBLESHOOTING - continued

PROBLEM:	Harmonic current distortion exceeds 8% on one or more
	phases at full load.
Possible cause:	On filters rated 52 amps and above, the capacitor assembly has not
	been connected.
Solution:	Check interconnection of capacitor assembly with reactor panel
	(Figure 26).
Possible cause:	A capacitor has failed.
Solution:	Inspect the tops of all capacitors for bowing. Replace failed
	capacitors.
Possible cause:	Source impedance is less than 1.5%.
Solution	Add a minimum 1.5% impedance line reactor to the filter input
Possible cause:	Input source voltage harmonic distortion.
Solution	Identify equipment causing harmonic voltage distortion and add
	filters as required or accept elevated THVD

Possible cause:

Line voltage unbalance exceeds 1%.

Solution:

Balance input line voltage to 1% or less.

PROBLEM:	Harmonic current distortion exceeds 5% on one or more
	phases at full load.
Possible cause:	The input reactor required for a 5% filter was not installed. (See
	Figure 38.)
Solution:	Install the required input reactor
Possible cause:	On filters rated 52 amps and above, the capacitor assembly has not
	been connected.
Solution:	Check interconnection of capacitor assembly with reactor panel
	(Figure 26).
Possible cause:	A capacitor has failed.
Solution:	Inspect the tops of all capacitors for bowing. Replace failed
	capacitors.

GEH-7252 49 May 2003