TEALwave® Patented Electrical Filtering

In a TEAL power subsystem, one valuable component is the patented TEALwave® high-energy shunt-connected low-pass filter. In a typical 3-phase TEAL power subsystem, the low-pass filtering is designed to reduce or eliminate intermediate and high-frequency noise (10kHz to 10MHz) that can often be damaging and disruptive to the customer’s equipment or processes.

TEAL's patented modular TEALwave® high performance filters installed
in a three phase PDU, 1 per phase.

The TEALwave® filter is an excellent way to remove electrical noise and spikes that would otherwise get through to the customer’s system, possibly causing disruptive power glitches (lost data, system resets, high signal-to-noise ratio, etc.) or even damaging events (damaged PCBs or Power Supplies, etc.). The TEALwave® high-energy filter can be a valuable component addition and a low-cost insurance policy against excess electrical noise.

To graphically show the additional benefit of the TEALwave® filter in a 3-phase system with a standard TEAL isolation transformer, the typical TEALwave® filter frequency response is shown in below compared to a typical TEAL 3-phase transformer without the added benefit of the TEALwave® filter.

Modeled Bode plot comparisons of TEALwave® Filter performance into normalized load.
Note the 3dB point improving from about 37kHz to about 4kHz, and the improved filtering
of 17kB at 10kHz, 50dB at 100kHz, and 70dB at 1MHz with the addition of the TEALwave® filter.
For a larger (and easier to view) version of this image, please click here.

For the majority of 3-phase applications, the TEALwave® filtering will limit an ANSI/IEEE Standard C62.41 6000V 3000A Category B Impulse applied at the input to a maximum of 40V let-through above the sine wave peak. The TEALwave® filter design can also be cascaded for improved performance for the most critical applications that require extreme filtering.

Typical Benefits of the TEALwave® Filter