PQI Distribution TransFilter DV Series

Specifications

Manufacturer:	PQI (Power Quality International)
Model:	Distribution TransFilter DV Series
Voltage Class:	1.2kV [Standards to 35kV]
BIL Rating:	10kV [Standard for Class]
Voltage:	480 :120/208 [All Standards to 35kV]
Type:	ANN
Temp. Rise:	150 C [130 C][115 C][80 C][Other]
Zero Seq. Imp:	<0.95% @ 60Hz
Zero Seq. React:	<0.3% @ 60Hz
Insulation Class:	220 degrees C
Product Benefits:	Reduces "penalty losses" due to harmonic currents Reduces apparatus heating and A/C loading Reduces power costs Provides an attractive "payback" and return-on-investment Balances primary phase currents Reduces THDV to less than 5% at non-linear electronic loads Restores switch-mode power supply’s "ride-through" capability Assures system compatibility with sensitive electronic loads Optional TP unit exceeds NEMA TP1-2002, CSA C802.2-00 & EPA Energy Star linear efficiency requirements Optional e-Rated unit exceeds the preceding efficiency requirements under severe non-linear loading up to 100% THDI

More Information

Type DV Distribution TransFilters are high efficiency, three-phase, single or multi-output distribution transformers that have been specifically designed to supply phase-to-neutral connected, non-linear electronic loads. These harmonic mitigating transformers reduce voltage distortion to less than 5% THDV at their loads and eliminate the network communication problems caused by high neutral-to-ground voltages, the result of load-generated zero-sequence harmonic neutral currents in four-wire distribution systems.

Optional TP transformers exceed the efficiency requirements of NEMA TP1-2002, CSA C802.2-00 and the EPA Energy Star under linear loading. Optional e-Rated units exceed these efficiency requirements under severe non-linear loading (. 100% THDI).

Type DV transformers cancel positive- and negative-sequence harmonic currents on their common primary bus or within their multi- output secondary windings. They are available in a number of standard primary-to-secondary phase-shifts so that they may be used to create twelve-, eighteen- or twenty-four-pulse systems.

Type DV Distribution TransFilters also cancel zero-sequence harmonic flux within their secondary windings. As a result, they provide ultra-low zero-sequence impedance, a characteristic that significantly reduces voltage distortion and 60Hz sine wave flat-topping at their loads. This secondary winding configuration also eliminates zero-sequence harmonic current in the primary windings.

Type DV transformers may be used as stand-alone mitigation solutions (i.e. without zero-sequence harmonic filters), when circuit length and/or loading are controlled. These limitations are graphically detailed in two PQI Publications entitled: (i) "Neutral-to-Ground Voltage vs. Branch Circuit Length & Loading for Typical Non-Linear Electronic Workstation Loads" and (ii) "Neutral-to-Ground Voltage vs. Branch Circuit Length & Loading for Typical 120V Non-Linear Electronic Gaming Machine Loads".

Type DV units are cost-effective alternatives to de-rated or K-Rated distribution transformers, which cannot reduce voltage distortion and are only intended to survive in a harmonic environment. Optional e-Rated units provide the most attractive payback and return-on-investment in the industry.

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