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Power Factor Correction
Harmonic Filter
Low voltage Automatic
Low Voltage Fixed
5-35
kV Metal Enclosed Automatic
5-35 kV Metal Enclose Fixed
5-138 kV Substation
5-35 kV Pole Mounted
Power Quality Engineering
Turn
Key Solutions
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DESCRIPTION:
Automatic medium and high voltage harmonic filters and power
factor correction capacitor systems are designed to automatically
switch "ON" or "OFF" to maintain a desired target power factor level
as well as maintaining harmonic content to within IEEE-519 standards,
under varying load conditions on the medium voltage distribution
systems. Each stage of the system is tuned to the same frequency
thereby insuring parallel resonance does not occur. In systems where
multi-frequency harmonic suppression reactors are employed they
are staged so that the lowest frequency stage is energized first
and is turned off last. The common practice of placing large static
blocks of capacitance or filters at the customers primary voltage
level does not offer this type of control. During low load periods
the voltage may rise to unacceptable levels due to leading power
factor. In addition many utilities cannot handle the additional
VARS on their system and are requesting that customers remove their
capacitors from operation during times when they are not required.
The automatic filter systems address both of these issues without
operational or utility problems.
STANDARD
FEATURES:
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Microprocessor based automatic control Control based on power
factor, voltage, or current
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Current
limiting reactors for back-back switching
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Individual [full line voltage rated] capacitor fusing with pop-up
indicators
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Vacuum switches for automatic switching
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Industrial rated relays
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Neutral unbalance protection on each individual stage
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4 pole ground switch with large viewing window and coordinated key
interlock
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