CN1641956A

CN1641956A - Intelligent surge protector with early warning device

Info

Publication number: CN1641956A
Application number: CN 200510006002
Authority: CN
Inventors: 王文杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-02
Filing date: 2005-01-02
Publication date: 2005-07-20

Abstract

The invention relates to a intelligent surging prevention circuit that has pre-alarming device. It comprises the surging prevention circuit identity that each phase is set a zero sequence instrument transformer. And the zero sequence instrument transformer connects to integrated circuit that connects to LCD, circuit breaker and releasing arrangement. It can not only protect downward device and can effectively protect voltage dependent resistor to avoid the spontaneous detonation phenomenon and tell user the time of damaged or lightning strike of each phase of voltage dependent resistor.

Description

The intelligent surge protector of band prior-warning device

One, affiliated technical field

The present invention relates to a kind of Surge Protector (SPD) and refer in particular to a kind of Surge Protector with prior-warning device.

Two, background technology

At present, all use piezo-resistance in the surge protection circuit of Surge Protector.As Chinese patent disclosed " supply socket Surge Protector " (ZL01258046.5, the day for announcing: 2002.11.20), it comprise housing and in the protective circuit of establishing, wherein thickness is much smaller than the housing waist centre position of plug slice length, be provided with the through hole that shape, size, distribution and figure place with plug slice match, the through hole edge of corresponding live wire and zero line is equipped with the metal contact respectively and places A, the B of the protective circuit in the protector head to be connected at 2; In the protective circuit, piezo-resistance MOV is connected with the A point with the common ends of resistance R, and the other end of resistance R is connected with the negative pole of luminous tube LED, and luminous tube LED positive pole is connected with the B point with the common ends of the other end of piezo-resistance MOV.But because piezo-resistance has unsettled leakage current, the piezo-resistance of poor-performing is damaged after using a period of time easily, and the user does not know to damage with which and damaged mutually, continues to use just very dangerous.

Three, summary of the invention

The object of the present invention is to provide a kind of intelligent surge protector with prior-warning device, it not only can protect back level equipment, and informs which phase piezo-resistance of user is damaged and the thunderbolt number of times.

For achieving the above object; the solution that the present invention takes is: a kind of intelligent surge protector with prior-warning device; comprise the Surge Protector body; Surge Protector body end of incoming cables is every to be provided with a zero-sequence transformer mutually; zero-sequence transformer connects integrated circuit; integrated circuit connects LCD, and integrated circuit also connects the circuit breaker tripping device.

, discharge over the ground when the Surge Protector body as lightning current, and detect signal by zero-sequence transformer and send to integrated circuit by liquid crystal display displays thunder number of times.When the Surge Protector body produces leakage current, detect signal by zero-sequence transformer and send to integrated circuit and carry out sound and light alarm and demonstration by LCD, which damages mutually to inform user's Surge Protector body.As the Imax of thunder-strike current more than or equal to the Surge Protector body, detect signal by zero-sequence transformer and send to integrated circuit the work of circuit breaker tripping device is threaded off in time, protected back level equipment.

Four, description of drawings

Fig. 1 is the electrical schematic diagram of embodiment one (four phases).

Fig. 2 is the electrical schematic diagram of embodiment two (two-phase).

Five, embodiment

Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.

Referring to Fig. 1; a kind of intelligent surge protector with prior-warning device; comprise Surge Protector body SPD; the Surge Protector body SPD every phase N in end of incoming cables, A, B, C are provided with zero-sequence transformer L1, a L2, L3, L4; zero-sequence transformer L1, L2 connect 2 pin of integrated circuit (IC) 1; zero-sequence transformer L3, L4 connect 1 pin of integrated circuit (IC) 1, and integrated circuit (IC) 1 meets LCD LCD, and 6 pin of integrated circuit (IC) 1 and 7 pin also meet circuit breaker tripping device J.

Referring to Fig. 2; a kind of intelligent surge protector with prior-warning device; comprise Surge Protector body SPD; the Surge Protector body SPD every phase N in end of incoming cables, L are provided with zero-sequence transformer L5, a L6; zero-sequence transformer L5 connects 2 pin of integrated circuit (IC) 1; zero-sequence transformer L6 connects 1 pin of integrated circuit (IC) 1, and integrated circuit (IC) 1 meets LCD LCD, and 6 pin of integrated circuit (IC) 1 and 7 pin also meet circuit breaker tripping device J.

Claims

1, a kind of intelligent surge protector with prior-warning device; comprise Surge Protector body (SPD); it is characterized in that: Surge Protector body (SPD) end of incoming cables every phase (N, A, B, C) is provided with a zero-sequence transformer (L1, L2, L3, L4); zero-sequence transformer (L1, L2, L3, L4) connects integrated circuit (IC1); integrated circuit (IC1) connects LCD (LCD), and integrated circuit (IC1) also connects circuit breaker tripping device (J).