Harmonic Mitigating Transformers

PQI has been on the leading edge of harmonic mitigation solutions longer than any other manufacturer in the industry. Our products are manufactured to the highest quality standards (ISO 9001), and our product designs have been proven highly effective in real-world scenarios. For these reasons, many engineers insist upon PQI for the most effective harmonic mitigation solutions. All PQI Distribution TransFilters™ result in:

Reduced power costs
Reduced penalty losses due to harmonic currents
Reduced transformer heating and A/C loading
Reduced THDv to less than 5% at nonlinear loads or motor drives
Reduced losses in the loads, thereby reducing A/C requirements
Improved switch-mode power supply’s “ride-through” capability
Balanced primary phase currents
Assured system compatibility with sensitive electronic loads

Our Type DY and Type DV Distribution TransFilters™ provide flexibility to engineer almost any solution; however, we also offer specialty harmonic mitigation transformers and filters designed to offer distinct advantages in certain applications.

PQI Product	Typical Application	Typical Industry	Additional Benefits Within Specialty Application
DY	Medium K-Factor loads	All	N/A
DV	High K-Factor loads	All	– Capable of developing 12-, 18-, 24- and 36-pulse primary systems
DD	Motor drive loads	All	– Provides isolation from upstream transients – Eliminates phase-to-ground voltage excursions at the motor drive
MY	240V motor loads	Industrial	– Resolves failure problems that result when 230V and 240V motor are supplied by conventional 208V sources – Eliminates motor over heating
SY	240V server loads	Data Centers	– Maintains voltage bandwidth required by rack-mounted servers – Reduces servers’ load current by 15% and l2R losses by 33%
SYV	240V and 120V server loads	Data Centers	– Provides optimum voltage for 240V and 120V server loads – Reduces 240V server load current by 15% and l²R losses by 33% when compared to a conventional 208V source
RV	Remote load centers	Data Centers	– Eliminates zero-sequence harmonic current on the neutral conductor of the feeder circuits that supply remote load centers
GY	240V gaming machine loads	Casinos	– Maintains voltage bandwidth required by gaming machines – Reduces servers’ load current by 15% and l²R losses by 25%
Z Filter(l₀ Filter & Mini-Z)	High K-Factor loads (l₀ Filter) Load-end of branch circuits (Mini-Z)	Casinos, Call Centers, Commercial Buildings	– Reduces neutral-to-ground voltages to <4V at nonlinear loads (<1V for Mini-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 (and branch circuit for Mini-Z)