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Torus Power WM Series Description
The input fuses prevent excessive current from
entering the PIU.
Circuit Protection
Thermal Protection
The Torus Power PIU will shut down if internal
unit temperature reached excessive levels.
Transient Voltage Surge Suppression (TVSS)
All WM Series models are available with a Transient Voltage Surge Suppression (TVSS) device
built into its signal path. The UL certified panel TVSS responds in under 5 nano-seconds and
manages surges up to 80,000 Amps. The TVSS also offers additional noise filtration of EMI and
RFI (40 dB typical).
Torus Power PIUs (Power Isolation Units) combine the best surge suppression with unique
toroidal transformer technologies from PLITRON to provide the ultimate performance and
protection for sensitive audio and video equipment applications.
Balanced input power from two 120V phases provides high input power and noise cancellation.
Using balanced input power provides the benefits of symmetrical power without the requirement
to use GFCI (ground fault circuit interruption) outlets. GFCIs are prone to nuisance trips. The
toroidal isolation transformer steps down the 240V input to 120V to power equipment. (Where
240V balanced input is unavailable, units may be configured for 208V operation.)
PIUs use ZeroSurge patented series-mode surge removal filters to absorb dangerous voltage
surges and safely dissipate them without using failure prone MOVs (metal oxide varistors). Also,
unlike MOV based protection, voltage surges are not shunted to ground.
Isolation is combined with proven proprietary technologies from PLITRON in the oversized
toroidal transformer. NBT works as a low pass filter using the controlled leakage inductance
and capacitances within the transformer to cancel common mode and differential mode noise.
LoNo technology has been used for years by high end audio companies who demand silent
transformers. Imin technology reduces inrush currents. UST provides additional common mode
filtering using a highly efficient Faraday screen.
Low-impedance output with balanced high power primary input provides the most unconstrained,
yet protected, energy source available to your equipment.
Power Sharing Outputs
Each output circuit breaker protects an individual circuit. However, all circuits share a single
winding (output) on the isolation transformer. This “Power-Sharing” allows huge excursions of
current, up to and beyond the full power of the unit, to be available at any individual circuit, for
instantaneous bursts of power.
