MEANS FOR LIMITING THE RESIDUAL LEVEL DURING SUPERIMPOSED OVER-VOLTAGE CONDITIONS IN A SURGE DIVERTER

• US 3,733,520 A
• Filed: 04/28/1972
• Issued: 05/15/1973
• Est. Priority Date: 05/03/1971
• Status: Expired due to Term

• Current Assignee: Asle Schei
• Original Assignee: Asle Schei
• Inventors: Schei, Asle
• Primary Examiner(s): Albritton, C. L.
• Application Number:
  US05/248,601
• Time in Patent Office: 382 Days
• Field of Search: 338/21,13,20 317/61,61.5,69,70,9R 315/35,36
• US Class Current: 361/130
• CPC Class Codes: H01T 4/16 having a plurality of gaps arranged in series
• CPC Class Codes: H02H 3/22 of short duration, e.g. lightning
• CPC Class Codes: H02H 9/06 using spark-gap arresters

Abstract

In a surge diverter, in order to limit the residual level during superimposed over-voltage conditions, a plurality of spark gap stacks with associated non-linear resistors are provided with a shunt spark gap shunting at least one spark gap stack with the associated non-linear resistor. A shunt impedance is provided shunting at least one spark gap stack which is shunted by the shunt spark gap. The surge diverter includes a sufficient number of shunt gaps to prevent the total voltage over the diverter upon super-imposed over-voltage conditions from exceeding the protection level of the diverter.

Claims

1. In a surge diverter, means to limit the residual level during superimposed over-voltage conditions, said means comprising a plurality of spark gap stacks (1) with associated serially connected non-linear resistors, and a shunt spark gap shunting at least one spark gap stack (1) with the associated non-linear resistor (2).

2. In a device according to claim 1, said shunt spark gap shunting two spark gap stacks (1) having a non-linear resistor (2) connected therebetween.

3. In a device according to claim 1, having a shunt impedance (5) shunting at least one spark gap stack (1) which is shunted by the shunt spark gap.

4. In a device according to claim 1, the surge diverter includes a sufficient number of shunt gaps (4) to prevent total voltage (Ua) over the diverter upon super-imposed over-voltage conditions from exceeding the prOtection level (Un) of the diverter.