CN1641955A

CN1641955A - Intelligent surge protector

Info

Publication number: CN1641955A
Application number: CN 200510006001
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 an intelligent surging prevention circuit that includes a crust and inner prevention circuit. Each phase in the prevention circuit connects to voltage dependent resistor. The incoming line of voltage dependent resistor adds a zero-sequence-instrument transformer, and the outgoing line connects to voltage dependent resistor releasing arrangement that connects to the incoming line of the circuit breaker. Zero-sequence-instrument transformer connects to integrated circuit that connects to rectifying circuit. And the rectifying circuit connects to the releasing arrangement of the circuit breaker. The zero-sequence-instrument transformer has another integrated circuit that connected to the LCD. 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

Intelligent surge protector

One, affiliated technical field

The present invention relates to a kind of Surge Protector (SPD).

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, after the piezo-resistance of poor-performing was used a period of time, due to leakage current was revealed than conference.

Three, summary of the invention

The object of the present invention is to provide a kind of intelligent surge protector, it not only can protect back level equipment, and can protect piezo-resistance effectively, avoids piezo-resistance that the self-destruction phenomenon takes place, and can inform that also 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; comprise housing and in the protective circuit of establishing; each all is connected to piezo-resistance mutually in the protective circuit; the piezo-resistance inlet wire increases zero-sequence transformer, an outlet and connects the piezo-resistance trip gear, and the piezo-resistance trip gear connects the circuit breaker end of incoming cables, and zero-sequence transformer connects integrated circuit; integrated circuit connects rectification circuit, and rectification circuit connects the circuit breaker tripping device.

Zero-sequence transformer also connects another integrated circuit, and this integrated circuit connects LCD.

When leakage current during greater than specified leakage current, detect signal by zero-sequence transformer and give integrated circuit, amplify and the rectification circuit rectification outputs to the circuit breaker tripping device through integrated circuit, make the work of circuit breaker tripping device, deenergization, protection back grade equipment.

When thunder-strike current during less than rated maximum current, lightning current discharges over the ground, and the circuit breaker tripping device can not worked.When thunder-strike current during more than or equal to rated maximum current; lightning current discharges over the ground; and detect signal by zero-sequence transformer and give integrated circuit; output to the circuit breaker tripping device through integrated circuit amplification and rectification circuit rectification; make the work of circuit breaker tripping device; deenergization, protection back level equipment.When the secondary lightning current is arranged, can be effectively to discharging lightning current, protection equipment.

Because the piezo-resistance outlet connects the piezo-resistance trip gear, when the piezo-resistance temperature rise reached uniform temperature, the piezo-resistance trip gear was threaded off, and protects piezo-resistance effectively, avoided piezo-resistance that the self-destruction phenomenon takes place.

When piezo-resistance was damaged, by zero-sequence transformer, zero-sequence transformer detected signal when having leakage current over the ground, during greater than rated value, detected signal is issued another integrated circuit and is given LCD through internal conversion, send sound and light alarm, and which damages mutually to inform the user.When thunder-strike current during more than or equal to rated maximum current, detect signal by zero-sequence transformer and give another integrated circuit and handle, counting once, by liquid crystal display displays.

Four, description of drawings

Fig. 1 is the electrical schematic diagram of present embodiment.

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; comprise housing and in the protective circuit of establishing; each phase N in the protective circuit; A '; B '; C ' is connected to piezo-resistance R1; R2; R3; R4; piezo-resistance R1; R2; R3; the R4 inlet wire increases a zero-sequence transformer L1; L2; L3; L4; outlet meets piezo-resistance trip gear K1; K2; K3; K4; piezo-resistance trip gear K1; K2; K3; K4 connects circuit breaker DZ end of incoming cables; zero-sequence transformer L1; L2 connects 2 pin of integrated circuit (IC) 2; zero-sequence transformer L3; L4 connects 1 pin of integrated circuit (IC) 2; 8 pin of integrated circuit (IC) 2 connect the input of rectification circuit D1-D4 by resistance R 5; the input of rectification circuit D1-D4 also connects the positive pole of controllable silicon VG; the control utmost point of controllable silicon VG connects 7 pin and the capacitor C 1 of integrated circuit (IC) 2; 6 pin of integrated circuit (IC) 2 connect capacitor C 2; the negative pole of another input termination controllable silicon VG of rectification circuit D1-D4; capacitor C 1 other end; 3 pin of capacitor C 2 other ends and integrated circuit (IC) 2; 5 pin of integrated circuit (IC) 2 connect 4 pin ground connection of integrated circuit (IC) 2, the output termination circuit breaker tripping device J of rectification circuit D1-D4.

Referring to Fig. 1, zero-sequence transformer L1, L2 connect 1 pin of integrated circuit (IC) 1, and zero-sequence transformer L3, L4 connect 2 pin of integrated circuit (IC) 1, and integrated circuit (IC) 1 meets LCD LCD.

Referring to Fig. 1, during use, equipment or other load LODA connect the leading-out terminal of circuit breaker DZ.

Referring to Fig. 1,, detect 1 and 2 bipods that signal is given integrated circuit (IC) 2 by zero-sequence transformer L1, L2, L3, L4 when leakage current during greater than 4mA; output to circuit breaker tripping device J through E, F end; make circuit breaker tripping device J work, deenergization, protection back level equipment.When thunder-strike current during less than the Imax of SPD, lightning current discharges over the ground, and circuit breaker tripping device J can not work.When thunder-strike current during more than or equal to the Imax of SPD; lightning current discharges over the ground; and detect 1 and 2 bipods that signal is given integrated circuit (IC) 2 by zero-sequence transformer L1, L2, L3, L4; output to circuit breaker tripping device J through E, F end; make circuit breaker tripping device J work; deenergization, protection back level equipment.Because piezo-resistance R1, R2, R3, R4 outlet meet piezo-resistance trip gear K1, K2, K3, K4; as piezo-resistance R1, R2, R3, when the R4 temperature rise reaches uniform temperature; piezo-resistance trip gear K1, K2, K3, K4 thread off; protect piezo-resistance R1, R2, R3, R4 effectively, avoid piezo-resistance R1, R2, R3, R4 that the self-destruction phenomenon takes place.As piezo-resistance R1, R2, when R3, R4 damage, pass through zero-sequence transformer L1, L2, L3, L4 when having leakage current over the ground, zero-sequence transformer inspection L1, L2, L3, L4 measure signal, during greater than 3mA, detected signal is issued 1 and 2 pin (A, B two ends) of integrated circuit (IC) 1, give LCD LCD through internal conversion, send sound and light alarm, and which damages mutually to inform the user.When thunder-strike current during more than or equal to 4mA, detect signal by zero-sequence transformer L1, L2, L3, L4 and give integrated circuit (IC) 1 and handle, counting is once shown by LCD LCD.

Claims

1; a kind of intelligent surge protector; comprise housing and in the protective circuit of establishing; each phase (N in the protective circuit; A '; B '; C ') all is connected to piezo-resistance (R1; R2; R3; R4); it is characterized in that: piezo-resistance (R1; R2; R3; R4) inlet wire increases a zero-sequence transformer (L1; L2; L3; L4); outlet meets piezo-resistance trip gear (K1; K2; K3; K4); piezo-resistance trip gear (K1; K2; K3; K4) connect circuit breaker (DZ) end of incoming cables; zero-sequence transformer (L1; L2; L3; L4) connect integrated circuit (IC2); integrated circuit (IC2) connects rectification circuit (D1-D4), and rectification circuit (D1-D4) connects circuit breaker tripping device (J).

2, a kind of intelligent surge protector according to claim 1 is characterized in that: zero-sequence transformer (L1, L2, L3, L4) also connects another integrated circuit (IC1), and this integrated circuit (IC1) connects LCD (LCD).

3; a kind of intelligent surge protector according to claim 1; it is characterized in that: 8 pin of integrated circuit (IC2) connect the input of rectification circuit (D1-D4) by resistance (R5); the input of rectification circuit (D1-D4) also connects the positive pole of controllable silicon (VG); the control utmost point of controllable silicon (VG) connects 7 pin and the electric capacity (C1) of integrated circuit (IC2); 6 pin of integrated circuit (IC2) connect electric capacity (C2); the negative pole of another input termination controllable silicon (VG) of rectification circuit (D1-D4); electric capacity (C1) other end; 3 pin of electric capacity (C2) other end and integrated circuit (IC2), 5 pin of integrated circuit (IC2) connect 4 pin ground connection of integrated circuit (IC2).