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TROUBLESHOOTING - continued
GEH-7252 49 May 2003
GE Capacitor & Power Quality Product
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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:
Solution
Source impedance is less than 1.5%.
Add a minimum 1.5% impedance line reactor to the filter input
Possible cause:
Solution
Input source voltage harmonic distortion.
Identify equipment causing harmonic voltage distortion and add
filters as required or accept elevated THVD
Possible cause:
Solution:
Line voltage unbalance exceeds 1%.
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.