Overvoltage protector
AssigneeTII Corporation
InventorFrank L. Simokat
Life of this patent
Estimating the term…
Abstract
The disclosed protector comprises a three electrode gas tube overvoltage protector serially connected with a heating element, the combination being connected in shunt across the load to be protected. Between that protecting shunt path and the source, a normally closed switch is provided which is responsive to the heating element and opens in the event of a sustained overvoltage condition. Accordingly, a prolonged surge which might otherwise destroy the gas tube and/or the protected load is isolated from both the shunt protection branch and from the load thus preventing damage to both.
Claims9
A protector circuit for protecting equipment protectors from both short term and long term overvoltage surges comprising:
- 1. input terminals adapted to be energized from a source of power;
- 2. output terminals adapted to supply power to the equipment to be protected;
- 3. a protection branch connected in shunt relationship with said output terminals and including:
- a. a gas tube overvoltage protector for protection against short term overvoltage surges, and
- b. actuating means thermally responsive to the current flow in said gas tube;
- 4. switching means coupled to said actuating means to be directly driven thereby, and connected between one of said input terminals and said protection branch to permit isolation of said protection branch and said output terminals from said input terminals in the event of a sustained overvoltage condition, and to restore operative connections in the event of cessation of said condition.
A protector circuit for protecting equipment and equipment protectors from both short term and long term overvoltage surges comprising:
- 1. input terminals adapted to be energized from a source of power;
- 2. output terminals adapted to supply power to the equipment to be protected;
- 3. a series protection branch connected in shunt relationship with said output terminals and including:
- a. a gas tube overvoltage protector for protection against short term overvoltage surges, and
- b. actuating means thermally responsive to the current flow in said gas tube;
- 4. switching means coupled to said actuating means to be directly driven thereby, and connected between one of said input terminals and said protection branch to permit isolation of said protector in the event of a sustained overvoltage condition, and to restore operative connections in the event of cessation of said condition.
Dependencies are inferred from the claim text.