US 2001/0026431 A1Published application

Transient voltage surge suppressor

AssigneeSmart Power Systems, Inc.

InventorBahram Mechanic

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Abstract

A transient voltage surge suppressor is provided to protect equipment with voltage sensitive electronics, such as office equipment, from surges or transients in the multi-phase power distribution network furnishing power. The surge suppressor senses the incoming voltage and electrically disconnects the neutral leads and hot leads of the power network from the neutral lead and hot lead of the office equipment if a voltage surge above an established level is sensed. The suppressor also disconnects its output when a ground connection in the multi-phase power network is disconnected to protect the equipment against excessive voltages. In this situation, the suppressor circuit protects its internal components from damage and possible fire hazard when its output is disabled, so that the suppressor can resume its function when conditions in the power distribution network return to a satisfactory state.

Claims10

Dependent claims

A protective circuit having hot, neutral, and ground leads arranged to be placed between corresponding hot, neutral, and ground leads of a power utility outlet and corresponding hot, neutral, and ground leads of electrical apparatus, said protective circuit comprising:

a voltage surge protection circuit connected between the hot and neutral leads, comprising:
first and second voltage surge protectors connected in series between the hot and neutral leads,
said first and second voltage surge protectors being connected at a common connection to each other;
a first relay connected between the hot and neutral leads of the protective circuit and controlling a first relay switch arm which connects the neutral lead of the power utility outlet and the neutral lead to the electrical apparatus when the first relay is receiving current, said first relay receiving current when the ground lead is connected to an electrical ground, and said first relay switch arm opening when current in the first relay circuit is not received to protect the electrical apparatus and the voltage surge protectors of the voltage surge protector circuit when the ground lead is not connected to an electrical ground.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 09/839,331Filed 20 Apr 2001
Priority: 13 May 1999
Published: 4 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H02H 9/04
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection: responsive to excess voltage
H02H 5/105
Responsive to mechanical injury, e.g. rupture of line, breakage of earth connection: responsive to deterioration or interruption of earth connection
H02H 9/001
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection: limiting speed of change of electric…
H02H
Emergency protective circuit arrangements

Family

Application09/311,240Continuation in part · filed 13 May 1999
Application09/839,331Continuation in part · filed 20 Apr 2001
US 6,229,682 B1Related patent
US 6,560,086 B2Related patent
US 2001/0026431 A1This patent

From the US filing history. Foreign family members aren’t listed.

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