Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1984-06-11
1987-06-30
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
361118, 361120, H02H 322
Patent
active
046775188
ABSTRACT:
A transient surge suppression system utilizes a negative resistance voltage breakdown device such as a gas discharge tube or a semiconductor device such as a SIDAC in series with a resistance element, preferably a non-linear resistance element, such as a varistor or Zener diode, to limit the amplitude of voltage transients applied to electrical equipment being protected. The breakdown device breaks down when a sufficiently high amplitude voltage transient is applied thereto, and the resistive element serves to protect the breakdown device from damage by excessive follow-on current. If a non-linear resistance device is used as the resistance element, the voltage across the combination is reduced at high currents. Several units may be cascaded to achieve sequential breakdown of multiple devices to thereby share the surge current among several devices and to reduce the dynamic impedance of the circuit and to multiply power dissipation capacity of the transient voltage surge suppression system.
REFERENCES:
patent: 4023071 (1977-05-01), Fussell
patent: 4035693 (1977-07-01), Luxa et al.
patent: 4419711 (1983-12-01), Seguin
patent: 4434396 (1984-02-01), Montague
IEEE Standard Dictionary of Electrical and Electronics Terms, Third Edition, 1984, p. 904.
DeBoer Todd
Pellinen A. D.
Power Integrity Corporation
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