CN211320923U

CN211320923U - Surge suppression circuit of 10KV lightning protection device

Info

Publication number: CN211320923U
Application number: CN201922379402.8U
Authority: CN
Inventors: 唐本镇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-08-21
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a 10KV lightning protection ware surge suppression circuit, including fuse F1, inductance L1, inductance L2, resistance R1, resistance R2, resistance R3, resistance AR1, piezo-resistor MOV1, piezo-resistor MOV2, piezo-resistor MOV3, bridge rectifier BD1, electric capacity C1, electric capacity CY1 and electric capacity CY2, piezo-resistor MOV1, piezo-resistor MOV2 and piezo-resistor MOV3 all adopt the piezo-resistor of high joule. According to the surge suppression circuit of the 10KV lightning arrester, through the isolation and hysteresis of the inductor L1 and the inductor L2, when the voltage at two ends of the voltage dependent resistor MOV1 exceeds a set value, the voltage and the current are quickly conducted, and the voltage and the current are consumed on the resistor R1 and the resistor R2; by connecting the bridge stack through BD1, the capacitor C1 and the capacitor R2 form an absorption circuit, and the stability of voltage and current output by the output terminal LO and the output terminal NO is improved; the whole has good inhibition effect on voltage and current, and plays a good role in protecting electric equipment.

Description

Surge suppression circuit of 10KV lightning protection device

Technical Field

The utility model relates to a power supply line technical field specifically is a 10KV lightning protection device surge suppression circuit.

Background

Lightning protection is mainly used for outdoor lines and lines which are easy to surge, such as workshops of large-scale machinery and ports of cranes, and because a large motor generates reverse peak voltage in the starting process. The surge suppression circuit has large surge voltage and current to a power grid, and if the surge voltage and the current are not suppressed, the surge suppression circuit can generate fatal damage to electronic products such as electric appliances, lighting lamps and the like, and the surge suppression circuit of the 10KV lightning arrester is provided on the basis.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 10KV lightning protection device surge suppression circuit has and plays fine inhibitory effect to voltage and electric current, plays fine guard action's advantage to the consumer, has solved the problem that surge voltage and the electric current that the electric wire netting exists cause fatal destruction to the consumer among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a surge suppression circuit of a 10KV lightning arrester comprises a fuse F1, an inductor L1, an inductor L2, a resistor R1, a resistor R2, a resistor R3, a resistor AR1, a piezoresistor MOV1, a piezoresistor MOV2, a piezoresistor MOV3, a bridge stack BD1, a capacitor C1, a capacitor CY1 and a capacitor CY2, wherein the input end of the fuse F1 is connected to a live power input terminal L, the output end of the fuse F1 is connected to the input end of the inductor L2 and connected to the input end of the resistor R1, the output ends of the inductor L2 and the resistor R1 are connected to an output terminal of the L0 and connected to the input end of the piezoresistor MOV1, the input end of the piezoresistor MOV2, a pin 1 of the bridge stack 1 and the input end of the capacitor CY 2; a pin 2 of the bridge stack DB1 is connected to the input end of a capacitor C1 and the input end of a resistor R2, and the output end of the capacitor C1 is connected with the output end of the resistor R2 and then connected to a pin 4 of the bridge stack DB 1; the input end of the resistor R3 is connected to a neutral line power supply input end N, the input end of the resistor R3 is connected with the input end of the inductor L1, the output end of the resistor R3 is connected with the output end of the inductor L1 and then connected to the NO output terminal, and is connected to the output end of the piezoresistor MOV1, the output end of the piezoresistor MOV3, a pin 2 of the bridge stack DB1 and the input end of the capacitor CY 2; the output end of the voltage dependent resistor MOV2 is connected to the input end of the voltage dependent resistor MOV3 and connected to the input end of the resistor AR1, and the output end of the resistor AR1, the output end of the capacitor CY2 and the output end of the capacitor CY2 are connected and then connected to the ground line G.

Preferably, the piezoresistors MOV1, MOV2 and MOV3 are all high Joule piezoresistors.

Preferably, the piezoresistor MOV2, the piezoresistor MOV3 and the resistor AR1 form a absorption circuit to the ground.

Compared with the prior art, the beneficial effects of the utility model are as follows:

according to the surge suppression circuit of the 10KV lightning protector, the fuse F1 is a current fuse, and when a dead short circuit exists at the output end, the fuse F1 can be fused, so that a power grid can be protected from being damaged. The inductor L1 and the inductor L2 mainly have the effect of isolation and hysteresis on surge, through the isolation and hysteresis of the inductor L1 and the inductor L2, high voltage and large current are added to the two ends of the varistor MOV1 through the resistor R1 and the resistor R3, and when the voltage at the two ends of the varistor MOV1 exceeds a set value, the varistor MOV1 is quickly conducted; all voltage and current are dissipated across resistor R1 and resistor R2; by connecting the bridge stack through BD1, the capacitor C1 and the capacitor R2 form an absorption circuit, and the stability of voltage and current output by the output terminal LO and the output terminal NO is improved; when the surge is from the live wire power input terminal L, zero line power input end N both ends are to ground, need piezo-resistor MOV2, piezo-resistor MOV3 and piezo-resistor AR1 to absorb, let surge voltage current enter household electrical appliances; the whole has good inhibition effect on voltage and current, and plays a good role in protecting electric equipment.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a 10KV lightning protection surge suppression circuit includes a fuse F1, an inductor L1, an inductor L2, a resistor R1, a resistor R2, a resistor R3, a resistor AR1, a varistor MOV1, a varistor MOV2, a varistor MOV3, a bridge stack BD1, a capacitor C1, a capacitor CY1 and a capacitor CY2, wherein the varistor MOV1, the varistor MOV2 and the varistor MOV2 are all high joule varistors, an input terminal of the fuse F2 is connected to a live power input terminal L, an output terminal of the fuse F2 is connected to an input terminal of the inductor L2 and to an input terminal of the resistor R2, output terminals of the inductor L2 and the resistor R2 are connected to an output terminal of the L2, and to an input terminal of the resistor MOV2, an input terminal of the varistor MOV2, an input terminal of the resistor MOV2, a pin 1 of the stack DB 2 and an input terminal of the capacitor CY 2; a pin 2 of the bridge stack DB1 is connected to the input end of a capacitor C1 and the input end of a resistor R2, and the output end of the capacitor C1 is connected with the output end of the resistor R2 and then connected to a pin 4 of the bridge stack DB 1; the input end of the resistor R3 is connected to a neutral line power supply input end N, the input end of the resistor R3 is connected with the input end of the inductor L1, the output end of the resistor R3 is connected with the output end of the inductor L1 and then connected to the NO output terminal, and is connected to the output end of the piezoresistor MOV1, the output end of the piezoresistor MOV3, a pin 2 of the bridge stack DB1 and the input end of the capacitor CY 2; the output end of the voltage dependent resistor MOV2 is connected to the input end of the voltage dependent resistor MOV3 and connected to the input end of the resistor AR1, and the output end of the resistor AR1, the output end of the capacitor CY2 and the output end of the capacitor CY2 are connected and then connected to the ground wire G; the voltage dependent resistor MOV2, the voltage dependent resistor MOV3 and the resistor AR1 form an absorption circuit to the ground, and when the surge is conducted to the ground from two ends of a live wire power input terminal L and a zero wire power input terminal N, the voltage dependent resistor MOV2, the voltage dependent resistor MOV3 and the resistor AR1 are adopted for absorption, so that the surge voltage current is not allowed to enter the household appliance.

According to the surge suppression circuit of the 10KV lightning protector, the fuse F1 is a current fuse, and when a dead short circuit exists at the output end, the fuse F1 can be fused, so that a power grid can be protected from being damaged. The inductor L1 and the inductor L2 mainly have the function of isolation and hysteresis on surge, when high voltage and high current of 10KV2000A are input from the live power input terminal L and the neutral power input terminal N, due to the isolation and hysteresis of the inductor L1 and the inductor L2, the high voltage and the high current are applied to two ends of the varistor MOV1 through the resistor R1 and the resistor R3. The varistor MOV1 is a high joule varistor. When the voltage at the two ends of the piezoresistor exceeds a set value, the piezoresistor is quickly switched on, and all the voltage and current are consumed on the resistor R1 and the resistor R2; but too low, which may cause malfunction of the input voltage, because the voltage-dependent value of the varistor MOV1 cannot be set too low. Therefore, when the surge voltage lower than the voltage dependent resistor MOV1 is still connected in series into the circuit, the incoming voltage passes through the BD1 bridge stack, the capacitor C1 and the capacitor R2 to form an absorption circuit. The voltage and current output by the output terminal LO and the output terminal NO are very stable; the voltage dependent resistor MOV2, the voltage dependent resistor MOV3 and the resistor AR1 form a circuit for absorbing the ground, when the surge is from the live power input terminal L and the zero power input terminal N, the voltage dependent resistor MOV2, the voltage dependent resistor MOV3 and the voltage dependent resistor AR1 are needed to absorb, and the surge voltage current is not allowed to enter the household appliance.

In summary, the following steps: according to the surge suppression circuit of the 10KV lightning arrester, a fuse F1 is a current fuse, when a complete short circuit exists at an output end, a fuse F1 can be fused to protect a power grid from being damaged, an inductor L1 and an inductor L2 mainly have an isolation hysteresis effect on surge, through the isolation and hysteresis effects of the inductor L1 and the inductor L2, high voltage and large current are applied to two ends of a piezoresistor MOV1 through a resistor R1 and a resistor R3, when the voltage at two ends of the piezoresistor MOV1 exceeds a set value, the piezoresistor MOV1 and the resistor R2 can be quickly conducted, and all the voltage and the current are consumed on the resistor R1 and the resistor R2; by connecting the bridge stack through BD1, the capacitor C1 and the capacitor R2 form an absorption circuit, and the stability of voltage and current output by the output terminal LO and the output terminal NO is improved; when the surge is from the live wire power input terminal L, zero line power input end N both ends are to ground, need piezo-resistor MOV2, piezo-resistor MOV3 and piezo-resistor AR1 to absorb, let surge voltage current enter household electrical appliances; the whole has good inhibition effect on voltage and current, and plays a good role in protecting electric equipment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A10 KV lightning arrester surge suppression circuit comprises a fuse F1, an inductor L1, an inductor L2, a resistor R1, a resistor R2, a resistor R3, a resistor AR1, a piezoresistor MOV1, a piezoresistor MOV2, a piezoresistor MOV3, a bridge stack BD1, a capacitor C1, a capacitor CY1 and a capacitor CY2, and is characterized in that: the input end of the fuse F1 is connected to a live wire power supply input terminal L, the output end of the fuse F1 is connected to the input end of an inductor L2 and is connected to the input end of a resistor R1, the output ends of the inductor L2 and the resistor R1 are connected and then connected to an L0 output terminal and are connected to the input end of a piezoresistor MOV1, the input end of the piezoresistor MOV2, a pin 1 of a bridge stack DB1 and the input end of a capacitor CY 2; a pin 2 of the bridge stack DB1 is connected to the input end of a capacitor C1 and the input end of a resistor R2, and the output end of the capacitor C1 is connected with the output end of the resistor R2 and then connected to a pin 4 of the bridge stack DB 1; the input end of the resistor R3 is connected to a neutral line power supply input end N, the input end of the resistor R3 is connected with the input end of the inductor L1, the output end of the resistor R3 is connected with the output end of the inductor L1 and then connected to the NO output terminal, and is connected to the output end of the piezoresistor MOV1, the output end of the piezoresistor MOV3, a pin 2 of the bridge stack DB1 and the input end of the capacitor CY 2; the output end of the voltage dependent resistor MOV2 is connected to the input end of the voltage dependent resistor MOV3 and connected to the input end of the resistor AR1, and the output end of the resistor AR1, the output end of the capacitor CY2 and the output end of the capacitor CY2 are connected and then connected to the ground line G.

2. The surge suppression circuit of the 10KV lightning protector according to claim 1, wherein: the piezoresistors MOV1, MOV2 and MOV3 are all high joule piezoresistors.

3. The surge suppression circuit of the 10KV lightning protector according to claim 1, wherein: the piezoresistor MOV2, the piezoresistor MOV3 and the resistor AR1 form a sink circuit to the ground.