Schools and Universities

Because schools and universities remain lightly occupied for extended periods of time, ultra-efficient transformers with low core losses provide a unique opportunity for significant energy savings. For this reason, ASHRAE has recommended ultra-efficient transformers that meet DOE CSL-3 efficiency requirements. PQI’s e-Rated® transformers exceed ASHRAE requirements and offer the most energy savings with the lowest cost.

In addition to our e-Rated® transformers, PQI’s harmonic mitigating Distribution TransFilters™ are essential for subsystems with high concentrations of nonlinear loads, such as computers, lab equipment, or electronic lighting ballasts.

Standard Products

PQI Product Description Benefits within Schools & Universities
EY (e-Rated®) UItra-efficient transformer

- Low first cost
- Utra-low excitation (core) losses reduces power costs

DY & DV Distribution TransFiltersTM

Harmonic mitigating transformers:
- DY for medium K-Factor loads
- DV for high K-Factor loads

- Reduces power costs
- Reduces penalty losses due to harmonic currents
- Reduces transformer heating and A/C loading
- Reduces THDv to less than 5% at nonlinear loads or motor driver
- Reduces losses in the loads, thereby reducing A/C requirements
- Improves switch-mode power supply's ride-through' capability
- Balance s primary phew currents
- Assures system compatibility with sensitive electronic loads
- Capable  of developing 12-.18-,2 4-. and 36-pulse primary systems (with Type DV)

Specialty Products

PQI Product Typical Application Additional Benefits within Schools & Universities
DD Motor drive loads

- Provide isolation from upstream transients
- Eliminates phase-to-ground voltage excursions at the motor drive

Z Filter (I0 Filter & Mini-Z)

High K-factor loads (l0 Filter)
Load-end of branch circuits (Mini-Z)

- Reduces neutral-to-ground voltages to <4V at nonlinear loads (<1V for M ini-Z)
- Increases general purpose (K-1) transformer capacity by up to 54%
- Protects upstream neutral conductor 
- Increases feeder and bus capacity
- Balances feeder and bus phase currents (& branch circuit for Mini-Z)

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