CN114336553A

CN114336553A - Surge protector

Info

Publication number: CN114336553A
Application number: CN202011060207.XA
Authority: CN
Inventors: 代德志; 雷成勇; 杨国华; 王雪颖
Original assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Current assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12
Anticipated expiration: 2040-09-30
Also published as: CN114336553B

Abstract

The invention discloses a surge protector, which comprises an electrode end I and an electrode end II; the n gap units are sequentially connected in series between the first electrode end and the second electrode end, and a common end is arranged between the adjacent gap units; the first ends of the k triggering circuits I are respectively connected with a common end, and the second ends of the k triggering circuits I are connected to the second electrode end; the first ends of the m triggering circuits II are respectively connected with a common end, and the second ends of the m triggering circuits II are connected to the electrode end I; the single common terminal is connected to only one of the first terminal of the first flip-flop circuit and the first terminal of the second flip-flop circuit. The invention shortens the lamination quantity of the layer-by-layer triggering of the gap units by utilizing the mutual matching of the trigger circuit II and the trigger circuit I, effectively reduces the wave front discharge voltage, reduces the starting voltage and improves the protection performance of the product.

Description

Surge protector

Technical Field

The invention relates to the technical field of electrical protection devices, in particular to a surge protection device.

Background

The surge protector can be used for protecting surge caused by lightning effect and the like. The surge protector is arranged in a protected system, and when a surge is generated on a line in the system, the surge protector acts to limit transient overvoltage on the line and release surge current, so that various electronic and electric devices in the system are protected.

The working process of the current gap type surge protector is that the gaps which are stacked together in series are triggered layer by layer, the number of the layers of the gaps is increased, the influence on the starting voltage and the voltage protection level is increased, the triggering voltage of the whole gap type surge protector is the superposed voltage after all the gaps are triggered, therefore, the starting voltage of the current multilayer gap type surge protector is higher, the reduction is difficult to effectively reduce, under the condition of considering the safety and the interruption follow current capability, the reduction of the voltage protection level and even the reduction of the voltage protection level to be less than 1500V are extremely difficult, and the application is limited.

Disclosure of Invention

The invention aims to solve the technical problems and the technical task of improving the prior art, provides a surge protector, and solves the problems that a multilayer gap type surge protector in the prior art has high starting voltage and poor protection effect under the condition of meeting the high interruption follow current capacity, and is difficult to meet the development requirement.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;

the n gap units are sequentially connected in series between the first electrode end and the second electrode end, and a common end is arranged between every two adjacent gap units;

first ends of the k trigger circuits are respectively connected with a common end, and second ends of the k trigger circuits are connected to a second electrode end;

the first ends of the m triggering circuits are respectively connected with a common end, and the second ends of the m triggering circuits are connected to the first electrode end;

the single common terminal is connected with only one of the first terminal of the first trigger circuit and the first terminal of the second trigger circuit;

wherein n is more than or equal to 3, k is more than or equal to 1 and less than n-1, m is more than or equal to 1 and less than n-1, and n, k and m are integers.

The surge protector utilizes the second trigger circuit to trigger the gap units in advance, which is equivalent to shortening the lamination number of the gap units, when surge voltage is applied to the first electrode end and the second electrode end, the surge voltage firstly acts on a series circuit formed by the first trigger circuit in the first path and the first gap unit close to the first electrode end, then the first gap unit discharges to ensure that the two ends of the first gap unit are electrically connected, and the gap units are triggered one by one from the electrode ends to the second electrode ends in the same way, because of the existence of the second trigger circuit, the one-way one-by-one triggering mode is broken, the gap units on the two sides of the common end connected with the second trigger circuit and the first trigger circuit connected with the two gap units also form the shortest series circuit between the first electrode end and the second electrode end, that is to say, surge voltage can also be applied to the series circuit at the first time, so that the gap units on the two sides of the public end connected with the second trigger circuit can be triggered to discharge in advance to establish electric continuity, and then layer-by-layer triggering can be carried out from the public end connected with the second trigger circuit to the first electrode end direction and the second electrode end direction respectively, namely, the number of layers triggered layer by layer is shortened, the base number of starting of the next gap unit influenced by impedance after the last gap unit is triggered is reduced, the wave front discharge voltage is effectively reduced, the starting voltage is reduced, the response speed is improved, and the protection performance of a product is improved.

Furthermore, when only one trigger circuit is arranged, the first end of the second trigger circuit is connected to the tth common end counted from the electrode end to the second electrode end, t is more than or equal to 2 and less than or equal to n-1, and t is an integer; or the first ends of the k first trigger circuits are respectively connected to the first k public ends counted from the electrode end to the electrode end, the first ends of the m second trigger circuits are respectively connected to the public ends counted from the electrode end to the electrode end from the t th to the n-1 th, wherein t is k +1, so that the gap units counted from the electrode end to the electrode end from the k +1 th to the n th can be triggered more quickly and stably, the total response time of the whole surge protector is effectively shortened, and the product performance is improved.

Furthermore, when the number n of the gap units is 16-22, t is more than or equal to n-7 and less than or equal to n-4;

when the number n of the gap units is 13-15, t is more than or equal to n-6 and less than or equal to n-2;

when the number n of the gap units is 8-12, t is more than or equal to n-5 and less than or equal to n-2;

when the number n of the gap units is 4-7, t is more than or equal to n-2 and less than or equal to n-1;

when the number n of the gap units is 3, t is 2.

The position of the common end connected with the second trigger circuit has influence on reducing the starting voltage and improving the response speed, two layer-by-layer trigger processes are conducted in the same direction from the tth common end to the first electrode end, and a single layer-by-layer trigger process is conducted between the tth common end and the second electrode end, namely, the triggering between the tth common end and the second electrode end is relatively slow, so that the common end connected with the second trigger circuit is required to be in a proper position, the gap unit between the common end connected with the second trigger circuit and the second electrode end can be rapidly triggered, and the wave front discharge voltage is reduced.

Furthermore, the first trigger circuit and the second trigger circuit comprise capacitors, and the capacitance of the capacitor in the second trigger circuit is greater than or equal to that of the capacitor in the first trigger circuit. When the gap units on two sides of the tth common end are triggered by the second trigger circuit, the capacitor of the second trigger circuit is charged, if the charging voltage of the second trigger circuit is too high, the voltage of the tth common end is lower after the gap units are discharged to establish electrical continuity, the triggering of the next pair of gap units is influenced, the capacitor capacity is related to the charging voltage, the charging voltage is reduced by adopting a mode of increasing the capacitor capacity, and therefore the subsequent gap units can be triggered better.

Furthermore, a first trigger circuit connected with the ith common terminal is CXi, i is more than or equal to 1 and less than or equal to t-1, i is an integer, and the capacitance of CXi is more than or equal to the capacitance of the other first trigger circuits. CXi is utilized to enhance the current after the trigger of the gap unit between the first electrode end and the ith common end and also enhance the current after the trigger of the gap unit between the ith common end and the tth common end, thereby improving the conductivity and the current for maintaining the conduction of the gap unit, reducing the arc voltage of the gap unit and the total wave front discharge voltage.

Further, when the number n of the gap units is 16-22, t-i is more than or equal to 5 and less than or equal to 10, that is, 5-10 gap units are arranged between the common end connected with the CXi and the common end connected with the second trigger circuit;

when the number n of the gap units is 13-15, t-i is more than or equal to 4 and less than or equal to 9, namely 4-9 gap units are arranged between the common end connected with the CXi and the common end connected with the second trigger circuit;

when the number n of the gap units is 8-12, t-i is more than or equal to 3 and less than or equal to 6, namely 3-6 gap units are arranged between the common end connected with the CXi and the common end connected with the second trigger circuit;

when the number n of the gap units is 4-7, t-i is more than or equal to 2 and less than or equal to 3, namely 2-3 gap units are arranged between the common end connected with the CXi and the common end connected with the second trigger circuit;

when the number n of the gap cells is 3, t-i is 1, that is, 1 gap cell is arranged between the common end connected with the CXi and the common end connected with the second trigger circuit.

CXi is connected with the position of the t-th common terminal connected with the trigger circuit II and the total number of the gap units, thereby ensuring that the gap units between the first electrode terminal and the t-th common terminal can be triggered and conducted quickly, improving the response speed and reducing the total wave front discharge voltage.

Furthermore, the discharge gap distance between the 2 nd to the i th gap units counted from the electrode end to the electrode end is smaller than the discharge gap distances of the rest gap units, and under the same condition, the smaller the discharge gap distance is, the smaller the required breakdown voltage is, and the mode can reduce the voltage fluctuation when the gap units are triggered, so that the last trigger waveform is more stable, and the fluctuation of the total wave front discharge voltage is reduced.

Furthermore, the discharge gap distance of the first gap unit close to the first electrode end is larger than or equal to the discharge gap distances of other gap units. The smaller the discharge gap interval is, the smaller the required breakdown voltage is, and the discharge gap interval of the first gap unit is set to be larger than those of the other gap units, so that the resistance of the surge protector can be improved, the leakage current can be reduced, and the forward conduction performance can be improved.

Furthermore, the first end of the first trigger circuit and the first end of the second trigger circuit are sequentially and alternately connected to the n-1 public ends from the electrode end to the electrode end II, so that the gap units connected in series are divided into a plurality of sections, the triggering is faster and more stable, and the total response time of the whole surge protector is shortened.

Furthermore, a voltage limiting circuit is connected between the electrode end I and the electrode end II and is composed of a voltage limiting element or a combination of the voltage limiting element and a switch element, the voltage limiting circuit is used for limiting overhigh voltage, peak waveforms generated when the discharge gap is broken down are restrained, the residual voltage value is ensured to be in a lower range, and the response time of the multilayer gap type surge protector can be shortened.

Furthermore, the first trigger circuit and the second trigger circuit are formed by one or more of a capacitor, a resistor, a piezoresistor, an inductor, a thermistor, a transient suppression diode, an air gap or a gas discharge tube.

Further, the gap unit comprises one or a combination of a gas discharge tube, a gap formed by graphite electrodes and a gap formed by metal electrodes, or the gap unit comprises a combination of one or a combination of a gas discharge tube, a gap formed by graphite electrodes and a gap formed by metal electrodes and one or a combination of more of a capacitor, a resistor, a piezoresistor, an inductor and a thermistor.

A surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;

the device is characterized by further comprising m triggering circuits II, wherein the first ends of the m triggering circuits II are respectively connected with a common end, and the second ends of the m triggering circuits II are connected to the electrode end I;

wherein n is more than or equal to 2, k is more than or equal to 1 and less than or equal to n-1, m is more than or equal to 1 and less than or equal to n-1, and n, k and m are integers.

A surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;

the first ends of the m second trigger circuits are respectively connected with a common end, and the second ends of the m second trigger circuits are respectively connected with a common end or connected to the same common end;

Compared with the prior art, the invention has the advantages that:

the surge protector utilizes the second trigger circuit to trigger the gap units in advance, so that the lamination number of layer-by-layer triggering of the gap units is reduced, the base number of starting of the next gap unit influenced by impedance after the triggering of the previous gap unit is reduced, the wave front discharge voltage is effectively reduced, the starting voltage is reduced, the response speed is improved, and the protection performance of a product is improved.

Drawings

FIG. 1 is a circuit diagram according to a first embodiment;

FIGS. 2(a) - (n) are different types of trigger circuits;

FIGS. 3(a) - (p) are different types of gap cells;

FIG. 4 is a circuit diagram of the second embodiment;

FIG. 5 is a circuit diagram according to a third embodiment;

FIG. 6 is a circuit diagram according to a fourth embodiment;

FIG. 7 is a schematic circuit diagram according to a fifth embodiment;

FIG. 8 is a schematic circuit diagram according to a sixth embodiment;

FIG. 9 is a first circuit diagram according to the seventh embodiment;

FIG. 10 is a second circuit diagram according to the seventh embodiment;

FIG. 11 is a detailed circuit diagram of the prior art;

FIG. 12 is a first exemplary circuit diagram.

In the figure: an electrode terminal A; a second electrode end B; gap cells F1, F2 … … Fn; the trigger circuits CX1, CX2 … … CXk; the flip-flop circuits two CY1, CY2 … … CYm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The surge protector disclosed by the embodiment of the invention effectively improves the trigger circuit, shortens the number of layers to be triggered layer by layer, effectively reduces the starting voltage, reduces the wave front discharge voltage, improves the response speed and enlarges the application range of the product.

Example one

A surge protector device, comprising essentially:

a first electrode end A and a second electrode end B;

the n gap units are sequentially connected in series between the first electrode end A and the second electrode end B, and a common end is arranged between every two adjacent gap units;

first ends of the k trigger circuits are respectively connected with a common end, and second ends of the k trigger circuits are connected to a second electrode end B;

the first ends of the m triggering circuits are respectively connected with a common end, and the second ends of the m triggering circuits are connected to the electrode end A;

n is more than or equal to 3, k is more than or equal to 1 and is less than n-1, m is more than or equal to 1 and is less than n-1, n, k and m are integers, and when a single common end is only connected with one of the first trigger circuit and the second trigger circuit, k + m is n-1.

Specifically, as shown in fig. 1, when only one trigger circuit is provided, the first end of the second trigger circuit is connected to the tth common end counted from the first electrode end a to the second electrode end B, where t is equal to or greater than 2 and equal to or less than n-1, and t is an integer, the number k of the first trigger circuits is equal to or greater than n-2.

Counting from an electrode end A to an electrode end B, wherein the gap units are F1 and F2 … … Fn in sequence, the trigger circuit I is CX1 and CX2 … … CXk in sequence, the trigger circuit II is CY1, and CY1 is connected to the tth common end;

when surge voltage is applied to the first electrode end and the second electrode end, CX1 triggers F1, F1 discharges to conduct and establish electrical continuity, CX2 triggers F2 again, namely, gap units are sequentially triggered from F1 to Fn direction through the trigger circuit I, CY1, Ft and CXt-1 form the shortest series circuit between the first electrode end and the second electrode end due to the existence of the trigger circuit II, CY1, Ft +1 and CXt +1 also form the shortest series circuit between the first electrode end and the second electrode end, therefore, when CX1 triggers F1, CY1 triggers Ft and Ft +1 at two ends of the t-th common end, Ft and Ft +1 discharge to conduct and establish electrical continuity, and then trigger layer by layer in two directions of the first working electrode and the second working electrode, the next group of trigger is Ft-1 and Ft +2, thus the number of layers needs to be reduced layer by layer, the base number of starting of the next gap which is influenced by the impedance after the last gap is triggered is reduced, the wave front discharge voltage is reduced, the starting voltage is reduced, the response time is shortened, and the performance of the surge protector is improved.

The position of the common end connected with the second trigger circuit has influence on reducing the starting voltage and improving the response speed, and the gap unit between the common end connected with the second trigger circuit and the second electrode end needs to be rapidly triggered, so that the wave front discharge voltage is reduced, therefore, the tth common end connected with the second trigger circuit needs to be closer to the second electrode end, and preferably, when the number n of the gap units is 16-22, n-7 is not less than t and not more than n-4; when the number n of the gap units is 13-15, t is more than or equal to n-6 and less than or equal to n-2; when the number n of the gap units is 8-12, t is more than or equal to n-5 and less than or equal to n-2; when the number n of the gap units is 4-7, t is more than or equal to n-2 and less than or equal to n-1; when the number n of the gap units is 3, t is 2.

The first trigger circuit and the second trigger circuit are formed by one or more combinations of a capacitor, a resistor, a piezoresistor, an inductor, a thermistor, a transient suppression diode, an air gap or a gas discharge tube, and specifically, as shown in fig. 2, the trigger circuit may be any one of the trigger circuits shown in the figure. The gap units connected in series between the first electrode end A and the second electrode end B can be the same or partially different, the gap units comprise one or a combination of a gas discharge tube, a gap formed by a graphite electrode and a gap formed by a metal electrode, or the gap units comprise a combination of one or a plurality of a gas discharge tube, a gap formed by a graphite electrode and a gap formed by a metal electrode and a capacitor, a resistor, a piezoresistor, an inductor and a thermistor. Specifically, as shown in fig. 3, the gap unit may be any one of sixteen gap units shown in the figure, wherein fig. 3(a) shows a two-electrode air gap G, fig. 8(b) shows a two-electrode air gap G connected in series with a resistor R, fig. 3(C) shows a two-electrode air gap G connected in series with a piezoresistor RV, fig. 3(d) shows a two-electrode air gap G connected in series with a gas discharge tube V, fig. 3(e) shows a two-electrode air gap G connected in series with a two-electrode air gap G, fig. 3(f) shows a two-electrode air gap G connected in parallel with a capacitor C, fig. 3(G) shows a two-electrode air gap G connected in parallel with a resistor R, fig. 3(h) shows a two-electrode air gap G connected in parallel with a piezoresistor RV, fig. 3(i) shows a two-electrode air gap G connected in parallel with a two-electrode gas discharge tube V, fig. 3(j) shows a two-electrode gas discharge tube V, fig. 3(k) shows the two-electrode gas discharge tube V connected in series with the resistor R, fig. 3(l) shows the two-electrode gas discharge tube V connected in series with the varistor RV, fig. 3(m) shows the two-electrode gas discharge tube V connected in parallel with the two-electrode gas discharge tube V, fig. 3(n) shows the two-electrode gas discharge tube V connected in parallel with the capacitor C, fig. 3(o) shows the two-electrode gas discharge tube V connected in parallel with the resistor R, and fig. 3(p) shows the two-electrode gas discharge tube V connected in parallel with the varistor RV.

When the first trigger circuit and the second trigger circuit include capacitors, the capacitance of the second trigger circuit is greater than or equal to that of the first trigger circuit, and preferably, the capacitance of the second trigger circuit is α times of that of the first trigger circuit, where α is greater than or equal to 2 and less than or equal to 100, or α is n-t. When the Ft and Ft +1 on two sides of the tth common end are triggered by the second trigger circuit, the capacitor of the second trigger circuit is charged, if the charging voltage of the second trigger circuit is too high, the voltage of the tth common end is lower after the Ft and Ft +1 are discharged, the triggering of the Ft-1 and the Ft +2 is influenced, the capacitor capacity is related to the charging voltage, the charging voltage is reduced by adopting a mode of increasing the capacitor capacity, and therefore the subsequent gap units can be better triggered.

Further, the gap distance of F1 may be set to be equal to or larger than the gap distance of the other gap cells, so that the resistance of the surge protector can be increased, the leakage current can be reduced, and the forward conduction performance can be improved.

Example two

As shown in fig. 4, based on the first embodiment, the first flip-flop circuit connected to the ith common terminal is CXi, i is greater than or equal to 1 and less than or equal to t-1, i is an integer, and the capacitance of CXi is greater than or equal to the capacitance of the first flip-flop circuit, preferably, the capacitance of CXi is 2-100 times the capacitance of the first flip-flop circuit, or the capacitance of CXi is equal to the capacitance of the second flip-flop circuit. CXi, the capacitance capacity is large, which can enhance the current after the trigger of the gap unit between the first to the ith public ends of the electrode terminals and the current after the trigger of the gap unit between the ith public end and the tth public end, thereby improving the conductivity and reducing the total wave front discharge voltage.

CXi and the position relation between the common end connected with the second trigger circuit and the tth common end connected with the second trigger circuit has influence on the trigger performance, preferably, when the number n of the gap units is 16-22, t-i is more than or equal to 5 and less than or equal to 10; when the number n of the gap units is 13-15, t-i is more than or equal to 4 and less than or equal to 9; when the number n of the gap units is 8-12, t-i is more than or equal to 3 and less than or equal to 6; when the number n of the gap units is 4-7, t-i is more than or equal to 2 and less than or equal to 3; when the number n of the gap units is 3, t-i is 1. The gap units between the first common end and the t-th common end of the electrode end can be triggered and conducted quickly, the response speed is improved, and the total wave front discharge voltage is reduced.

Furthermore, the discharge gap distance between the 2 nd gap unit and the ith gap unit counted from the electrode end A to the electrode end B is less than or equal to the discharge gap distance between the other gap units, preferably, the discharge gap distance between the 2 nd gap unit and the ith gap unit is smaller than the discharge gap distance between the other gap units by 0.02 mm-0.2 mm; and the discharge gap interval of the gap unit between the ith common terminal and the tth common terminal is larger than the discharge gap interval of the gap unit between the tth common terminal and the second electrode terminal B. The layer-by-layer triggering generated by the triggering circuit II comprises two branch directions, wherein one branch direction is from the tth public end to the electrode end I for layer-by-layer triggering, and the other branch direction is from the tth public end to the electrode end II for layer-by-layer triggering.

EXAMPLE III

As shown in fig. 5, the difference from the first embodiment is that the second trigger circuit is provided with multiple paths, and the second trigger circuit is CY1 and CY2 … … CYm in sequence from the first electrode end a to the second electrode end B, and the first ends of the k first trigger circuits are respectively connected to the first k common ends counted from the first electrode end a to the second electrode end B, that is, the k first trigger circuits are collectively connected to k common ends close to the first electrode end a, and the first ends of the m second trigger circuits are respectively connected to the t-th to n-1-th common ends counted from the first electrode end a to the second electrode end B, where t is k +1, that is, the m second trigger circuits are collectively connected to m common ends close to the second electrode end B, so that the m second trigger circuits can trigger the gap cells on the branch Ft +1 to Fn more stably and rapidly, the total response time of the whole surge protector is shortened.

Example four

As shown in fig. 6, the difference from the third embodiment is that the first terminal of the first trigger circuit and the first terminal of the second trigger circuit are alternately connected to n-1 common terminals in sequence from the first electrode terminal a to the second electrode terminal B, which is equivalent to divide the series gap units into several segments, so that the triggering is faster and more stable, and the total response time of the whole surge protector is effectively shortened.

EXAMPLE five

As shown in fig. 7, on the basis of the first embodiment, a voltage limiting circuit is further connected between the first electrode terminal a and the second electrode terminal B, and the voltage limiting circuit is formed by a voltage limiting element or a combination of the voltage limiting element and a switch element. Specifically, the voltage limiting circuit may be a combination of a piezoresistor or a gap formed by the piezoresistor and a gas discharge tube or a graphite electrode or a gap formed by a metal electrode, a lightning protection device such as a capacitor, a resistor container, a piezoresistor, an inductor, a thermistor, and the like, and after the upper voltage limiting circuit is connected in parallel between the first electrode end a and the second electrode end B, the voltage limiting circuit can respond to a surge larger than a voltage-sensitive voltage by using a voltage-sensitive voltage limiting characteristic, so that the total response time of the whole surge protection device is reduced.

EXAMPLE six

As shown in fig. 8, a surge protector device includes:

a first electrode end A and a second electrode end B;

the first ends of the m triggering circuits are respectively connected with a common end, the second ends of the m triggering circuits are connected to the electrode end A, and the common end can be simultaneously connected with the triggering circuit I and the triggering circuit II;

Specifically, counting is performed from An electrode end A to An electrode end B, the gap units are F1 and F2 … … Fn in sequence, the common ends of the adjacent gap units are A1 and A2 … … An-1 in sequence, the first trigger circuit is provided with k-n-1, CX1 and CX2 … … CXn-1 in sequence, the second trigger circuit is provided with one, CY1, CY1 is connected to the tth common end, and the tth common end is connected with the first trigger circuit and the second trigger circuit.

The working process of the surge protector is similar to that of the embodiment, when surge voltage is applied to the first electrode end and the second electrode end, CX1 triggers F1, after F1 is in discharge conduction and establishes electrical continuity, CX2 triggers F2 again, and due to the existence of the second trigger circuit, CY1, Ft and CXt-1 form the shortest series circuit between the first electrode end and the second electrode end, and CY1, Ft +1 and CXt +1 also form the shortest series circuit between the first electrode end and the second electrode end, so that when CX1 triggers F1, CY1 triggers Ft and Ft +1 at two ends of the t-th common end, Ft and Ft +1 are in discharge conduction and establish electrical continuity, and then trigger layer by layer in two directions of the first working electrode and the second working electrode, and the next group of triggers are Ft-1 and Ft +2, thereby the number of layers is reduced as required, the effect of reducing the impedance after the trigger of the previous gap affects the starting base number of the next gap, reduces the wave front discharge voltage, reduces the starting voltage, and shortens the response time.

EXAMPLE seven

A surge protector device comprising:

a first electrode end A and a second electrode end B;

the circuit is characterized by further comprising m second trigger circuits, wherein the first ends of the m second trigger circuits are respectively connected with a common end, and the second ends of the m second trigger circuits are respectively connected with a common end or the same common end;

Specifically, as shown in fig. 9, only one trigger circuit two is provided, the first end of the trigger circuit two is connected to the t-th common end, the second end of the trigger circuit two is connected to the 1 st common end, and the t-th common end is only connected to the trigger circuit two and not connected to the trigger circuit one, n-2 trigger circuits are provided, and each common end is connected to one trigger circuit one from the 1 st common end to the n-1 st common end (except for the t-th common end);

the working process of the surge protector is the same as that of the embodiment, when surge voltage is applied to the first electrode end and the second electrode end, CX1 triggers F1, after F1 is in discharge conduction and establishes electrical continuity, CX2 triggers F2 again, gap units are sequentially triggered from F1 to Fn direction through the first trigger circuit, due to the existence of the second trigger circuit, after F1 is in discharge conduction and establishes electrical continuity, "conducted F1", CY1, Ft and CXt-1 form the shortest series circuit between the first electrode end and the second electrode end, and "conducted F1", CY1, Ft +1 and CXt +1 also form the shortest series circuit between the first electrode end and the second electrode end, so that when CX2 triggers F2, CY1 triggers Ft and Ft +1 at both ends of the t-th common end, and Ft +1 establish discharge conduction, and then layer-by-layer triggering is carried out in two directions of the working electrode I and the working electrode II, the next group of triggering is Ft-1 and Ft +2, which is equivalent to shortening the layer number needing layer-by-layer triggering, reducing the base number of the starting of the next gap influenced by the impedance triggered by the previous gap, reducing the wave front discharge voltage, reducing the starting voltage and shortening the response time.

Specifically, as shown in fig. 10, only one trigger circuit two is provided, the first end of the trigger circuit two is connected to the tth common terminal, the second end of the trigger circuit two is connected to the 1 st common terminal, and the tth common terminal is only connected to the trigger circuit two and not connected to the trigger circuit one, n-3 trigger circuits are provided for the trigger circuit one, and each common terminal is connected to one trigger circuit one from the 2 nd common terminal to the n-1 th common terminal (except for the tth common terminal), and the working process is similar to that of the previous scheme.

As shown in fig. 11, for the surge protector of the prior art, F1 to F11 are discharge gaps, capacitance of capacitors of the first trigger circuits CX1 to CX10 is 1000pF, starting voltage 1200V, and results of 10 wave front discharge voltage tests are shown in table 1.

TABLE 1 (Unit: kV)

1	2	3	4	5	6	7	8	9	10
										2.12	2.26	1.96	2.12	2.22	1.96	2.36	2.06	2.00	2.22

As shown in fig. 12, F1 to F11 are discharge gaps, capacitance of the first flip-flop circuits CX1 to CX9 is 1000pF, capacitance of the second flip-flop circuit CY1 is 5nF, capacitance of CX5 is 7nF, starting voltage 700V, and results of 10 wave front discharge voltage tests are shown in table 2.

TABLE 2 (Unit: kV)

1	2	3	4	5	6	7	8	9	10
										1.14	1.32	1.20	1.16	1.04	1.22	1.12	1.10	1.20	1.26

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims

1. A surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;

2. A surge protector according to claim 1, wherein when only one of said second trigger circuits is provided, a first end of said second trigger circuit is connected to a tth common end counted from said electrode terminal to said second electrode terminal, said t is 2 or more and n-1 or less, and t is an integer; or the first ends of the k first trigger circuits are respectively connected to the first k public ends counted from the electrode end to the electrode end two, and the first ends of the m second trigger circuits are respectively connected to the common ends from the t-th to the n-1-th counted from the electrode end to the electrode end two, wherein t is k + 1.

3. A surge protector according to claim 2, wherein when the number n of the gap elements is 16 to 22, n-7. ltoreq. t. ltoreq. n-4;

when the number n of the gap units is 3, t is 2.

4. A surge protector as claimed in claim 2, wherein the first and second triggering circuits comprise capacitors, and the capacitance of the capacitor in the second triggering circuit is greater than or equal to that in the first triggering circuit.

5. A surge protector according to claim 4, wherein the first trigger circuit connected to the ith common terminal is CXi, 1 ≦ i ≦ t-1, i is an integer, and the capacitance of CXi is greater than or equal to the capacitance of the first remaining trigger circuits.

6. A surge protector according to claim 5, wherein when the number n of the gap elements is 16 to 22, t-i is 5-10;

when the number n of the gap units is 13-15, t-i is more than or equal to 4 and less than or equal to 9;

when the number n of the gap units is 8-12, t-i is more than or equal to 3 and less than or equal to 6;

when the number n of the gap units is 4-7, t-i is more than or equal to 2 and less than or equal to 3;

when the number n of the gap units is 3, t-i is 1.

7. A surge protector according to claim 5, wherein the gap spacing of the 2 nd to i th gap cells counted from the electrode terminal to the electrode terminal is less than or equal to the gap spacing of the remaining gap cells.

8. A surge protector according to claim 1, wherein the gap spacing of the first gap cell adjacent to the first electrode terminal is equal to or greater than the gap spacing of the other gap cells.

9. A surge protector according to claim 1, wherein the first terminal of the first trigger circuit and the first terminal of the second trigger circuit are alternately connected to n-1 common terminals in sequence from the electrode terminal to the electrode terminal.

10. A surge protector according to claim 1, wherein a voltage limiting circuit is further connected between the first electrode terminal and the second electrode terminal, and the voltage limiting circuit is formed by a voltage limiting element or a combination of a voltage limiting element and a switch element.

11. A surge protector according to claim 1, wherein the first and second trigger circuits are formed by one or more of a capacitor, a resistor, a varistor, an inductor, a thermistor, a transient suppression diode, an air gap, or a gas discharge tube.

12. A surge arrester as claimed in claim 1, wherein the gap member comprises one or a combination of a gas discharge tube, a gap formed by graphite electrodes, and a gap formed by metal electrodes, or a combination of a gas discharge tube, a gap formed by graphite electrodes, and a gap formed by metal electrodes and one or more of a capacitor, a resistor, a varistor, an inductor, and a thermistor.

13. A surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;

14. A surge protector device comprising:

the electrode terminal I and the electrode terminal II are connected;