阅读说明：本技术 过电压保护器 (Overvoltage protector ) 是由 杨季民 于 2020-07-02 设计创作，主要内容包括：本发明涉及低压配电电网及直流电源过电压事故保护的电工、电子器件,具体地说是一种过电压保护器。现有的电气保护装置大多只对线路过流保护,少数过压保护装置由于受限于所用元器件,存在多次导通后参数下降的缺陷。本发明技术方案包括一只双向可控硅和一只双向瞬态电压抑制二极管,双向瞬态电压抑制二极管的一端连接双向可控硅的控制级,另一端连接双向可控硅的第二阳极；双向可控硅的两阳极分别为保护器的二只引脚。本发明的优点是：温度特性和各项电气性能指标稳定,体积小,且由于双向瞬态电压抑制二极管具有漏电流小、响应时间快、受环境温度影响小、连续使用各项指标稳定的特点,提高了过电压保护器的技术性能和指标。(The invention relates to an electrician and an electronic device for overvoltage accident protection of a low-voltage distribution power grid and a direct-current power supply, in particular to an overvoltage protector. Most of the existing electric protection devices only carry out overcurrent protection on a line, and few overvoltage protection devices have the defect of parameter reduction after multiple breakover because of being limited by used components. The technical scheme of the invention comprises a bidirectional thyristor and a bidirectional transient voltage suppression diode, wherein one end of the bidirectional transient voltage suppression diode is connected with the control stage of the bidirectional thyristor, and the other end of the bidirectional transient voltage suppression diode is connected with a second anode of the bidirectional thyristor; two anodes of the bidirectional controllable silicon are two pins of the protector respectively. The invention has the advantages that: the temperature characteristic and various electrical performance indexes are stable, the size is small, and the bidirectional transient voltage suppression diode has the characteristics of small leakage current, quick response time, small influence of environmental temperature and stable various indexes in continuous use, so that the technical performance and indexes of the overvoltage protector are improved.)

1. An overvoltage protector, characterized by: the power supply comprises a bidirectional thyristor (V) and a bidirectional transient voltage suppression diode (VD), wherein one end of the bidirectional transient voltage suppression diode (VD) is connected with a control stage (G) of the bidirectional thyristor (V), and the other end of the bidirectional transient voltage suppression diode (VD) is connected with a second anode (T2) of the bidirectional thyristor (V); and a first anode (T1) and a second anode (T2) of the bidirectional triode thyristor (V) are a pin 1 and a pin 2 of the overvoltage protector respectively.

2. An overvoltage protector as claimed in claim 1 wherein: and pins of the bidirectional thyristor (V) and the bidirectional transient voltage suppression diode (VD) are correspondingly welded, and then are packaged by adopting an insulating material.

Technical Field

The invention relates to an electrician and an electronic device for overvoltage power accident protection of a low-voltage distribution power grid and a direct-current power supply, in particular to an overvoltage protector. The overvoltage protection circuit is suitable for overvoltage accident protection of low-voltage distribution power networks (AC 220V and AC 380V) and direct-current power supplies.

Background

In order to ensure the safe use and operation of electric equipment, a circuit breaker and a fuse are usually installed in a distribution line to protect against overload and short-circuit accidents, and a power supply line is cut off when the circuit has overload and short-circuit accidents, so that the electric equipment is protected and the fire accidents are prevented. Most of the common electric protection devices in the current market are overcurrent and short-circuit protection devices, and have no protection effect on overvoltage accidents of a power supply line; the composite overvoltage protector disclosed in the Chinese patent ZL 93206520.1 and the overvoltage control module disclosed in the ZL200410039063.4 realize the overvoltage accident protection of the power grid, but due to the limitation of materials and production processes of the piezoresistor, the following defects exist: the voltage dependent resistor is connected with the overvoltage control module through the voltage dependent resistor, and the overvoltage control module is connected with the overvoltage protector through the voltage dependent resistor.

Disclosure of Invention

The invention aims to provide an overvoltage protector which is an overvoltage accident protector which is formed by a bidirectional triode thyristor TRIAC and a bidirectional transient voltage suppression diode TVS, can be continuously used and has stable quality performance.

The technical scheme of the invention is as follows: the bidirectional transient voltage suppressor comprises a bidirectional thyristor and a bidirectional transient voltage suppressor diode, wherein one end of the bidirectional transient voltage suppressor diode is connected with a control stage G of the bidirectional thyristor, and the other end of the bidirectional transient voltage suppressor diode is connected with a second anode T2 of the bidirectional thyristor; the first anode T1 and the second anode T2 of the triac are pin 1 and pin 2 of the overvoltage protector, respectively.

Furthermore, pins of the bidirectional thyristor and the bidirectional transient voltage suppression diode are correspondingly welded, and then the outside of the bidirectional thyristor and the bidirectional transient voltage suppression diode is packaged by adopting an insulating material.

The invention has the advantages that: the temperature characteristic and various electrical performance indexes are stable, the size is small, the circuit breaker or the fuse is matched for use, and the circuit breaker or the fuse is used for overvoltage accident protection of low-voltage distribution power grids (AC 220V and AC 380V) and direct-current power supplies and has universal practicability. When the power supply voltage of the power grid is normal, the bidirectional transient voltage suppressor diode and the bidirectional thyristor are in a cut-off state, and the power grid or the direct-current power supply normally supplies power to the electric equipment; when the voltage of a power grid or a direct current power supply rises and exceeds a rated value, a bidirectional transient voltage suppression diode is conducted to trigger a bidirectional thyristor control level, the bidirectional thyristor is conducted, firstly, a tripping coil of a circuit breaker is driven to work to trip the circuit breaker, and an accident power supply is cut off; or the bidirectional thyristor is conducted to form a short circuit between the L line and the N line, and the fuse fuses to cut off the power supply, thereby realizing the purpose of protecting the electric equipment. The bidirectional transient voltage suppressor has the characteristics of small leakage current, strong reverse surge tolerance capability, quick response time, small influence of environmental temperature, good reverse clamping suppression characteristic, strong adaptability and stable continuous use of various index parameters, and compared with the prior art, the technical performance and index of the overvoltage protector are improved.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a structural view of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the operation of embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the operation of embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of the operation of embodiment 3 of the present invention;

fig. 5 is a working principle diagram of embodiment 4 of the present invention.

Detailed Description