Power line transient limiter

Details Power line transient limiter Power line transient limiter

1979-05-24

1982-03-23

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 307252T, H02H 720

Patent

active

043216447

ABSTRACT:
The transient limiter suppresses high voltage transients induced on an alternating current (AC) carrying power line. A Zener diode string breaks down for voltages on the line which exceed the peak AC voltage. The breakdown current is directly connected to the gate terminals of a pair of silicon controlled rectifiers (SCR's). Each rectifier is series connected to a voltage responsive resistor with the combination being connected across the power line terminals. Upon breakdown of the Zener diode string one of the SCR's and its associated voltage responsive resistor switch to a low impedance state, thereby limiting the peak voltage on the power line.

REFERENCES:
patent: 3213349 (1965-10-01), Gutzwiller
patent: 3375405 (1968-03-01), Fallon et al.
patent: 3456084 (1969-07-01), Haselton, Jr.
patent: 3571660 (1971-03-01), Phillips
patent: 3793535 (1974-02-01), Chowdhuri
patent: 3947726 (1976-03-01), DeCecco et al.
patent: 3968407 (1976-07-01), Wilson
patent: 4118749 (1978-10-01), Matuzaki et al.

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