Surge voltage generator for pulsing grounded and ungrounded elec

Details Surge voltage generator for pulsing grounded and ungrounded elec Surge voltage generator for pulsing grounded and ungrounded elec

1994-09-30

1996-07-16

Stephan, Steven L.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of electrically operated apparatus

324510, 324546, 307107, G01R 3102

Patent

active

055370446

ABSTRACT:
A coupling circuit receives a high voltage surge wave and injects it into e or more power lines of a single-phase or three-phase power supply circuit, either line-to-line or line-to-ground. The coupling circuit may have a surge coupler including a series connection of a gas tube and a coupling capacitor, and preferably a rectifier, and a shunt resistor for discharging the coupling capacitor. A one-stage or two-stage surge back filter across the power lines protects the power source from the surge wave. Each surge back filter may have series inductors, and shunt surge suppression circuits, which may each include a series combination of a capacitor and a resistor, in parallel with at least one metal-oxide varistor (MOV) or a cluster of MOVs. A grounding suppressor connected from a power line to ground may include gas tubes and/or MOVs, inductors and resistors. Risetime adjusting circuits including resistors and capacitors may be connected between the power lines and/or between the power lines and ground.

REFERENCES:
patent: 4843515 (1989-06-01), Richman
patent: 4868505 (1989-09-01), Stahl

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