CN209088521U

CN209088521U - Mutually protective device

Info

Publication number: CN209088521U
Application number: CN201822203168.9U
Authority: CN
Inventors: 焦安海
Original assignee: Baoding Ke Wei Power Tech Corp Inc
Current assignee: Baoding Ke Wei Power Tech Corp Inc
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2019-07-09
Anticipated expiration: 2028-12-26

Abstract

A kind of the utility model discloses phase protective device, including power module, signal acquisition process module, main control module and trip signal output module, signal acquisition process module includes the current transformer for acquiring zero-sequence current, for the current signal of acquisition to be converted to the current-to-voltage converting circuit of voltage signal, amplifying circuit and converter, current transformer is connected through filter with current-to-voltage converting circuit, current-to-voltage converting circuit is connected through amplifying circuit with converter, converter is connected with main control module, main control module is connected with trip signal output module, main control module is also connected with clock module.The phase of the utility model using the above structure ground protective device; it by the zero-sequence current in each circuit of real-time monitoring, trips after first issuing alarm signal after collection value is greater than the set value, to cut off power supply trouble route; to protect equipment, huge economic losses caused by overstepping has a power failure are avoided.

Description

Mutually protective device

Technical field

A kind of a kind of the utility model relates to electric leakage protection technology more particularly to phase protective device.

Background technique

With the rapid development of integrated circuit, short-circuit protection circuit is become more and more important, but 400v-690v electricity at present Source is generally fitted without low pressure zero sequence protection device, the following feeder line of second level bus once occurs after operation or motor single-phase earthing is existing As level-one bus feeder line zero-sequenceprotection just will appear overstepping signal output failure.

Utility model content

A kind of the purpose of the utility model is to provide phase protective device, by the zero-sequence current in each circuit of real-time monitoring, It trips after first issuing alarm signal after collection value is greater than the set value, to cut off power supply trouble route, to protect equipment, keeps away Huge economic losses caused by overstepping has a power failure are exempted from.

To achieve the above object, the utility model with providing a kind of phase protective device, including power module, signal acquisition Processing module, main control module and trip signal output module, the signal acquisition process module include for acquiring the zero sequence The current transformer of electric current, the current-to-voltage converting circuit for the current signal of acquisition to be converted to voltage signal, amplification electricity Road and converter, the current transformer are connected through filter with the current-to-voltage converting circuit, and the Current Voltage turns It changes circuit and is connected through the amplifying circuit with the converter, the converter is connected with the main control module, the master Control module is connected with the trip signal output module, and the main control module is also connected with clock module.

Preferably, the trip signal output module includes photoelectric isolating circuit and relay, the photoelectric isolating circuit Input terminal is connected with the main control module, and the photoelectric isolating circuit output end is connected with the relay input terminal, it is described after Electrical output terminal is connected with alarm.

Preferably, the main control module is also connected with human-computer interaction module.

Preferably, the communication module for remote transmission fault message, the communication are also connected on the main control module Module is RS485 communication interface.

Therefore, the phase using the above structure of the utility model ground protective device, passes through the zero sequence in each circuit of real-time monitoring Electric current trips after first issuing alarm signal after collection value is greater than the set value, to cut off power supply trouble route, is set with protection It is standby, avoid huge economic losses caused by overstepping has a power failure.

Below by drawings and examples, the technical solution of the utility model is described in further detail.

Detailed description of the invention

The structural block diagram of Fig. 1 for a kind of phase of the embodiments of the present invention protective device；

The circuit diagram of Fig. 2 for a kind of phase of the embodiments of the present invention protective device.

Wherein: 1, signal acquisition process module；2, clock module；3, power module；4, human-computer interaction module；5, tripping letter Number output module；6, communication module.

Specific embodiment

Below with reference to attached drawing, the utility model will be further described, it should be noted that the present embodiment is with this skill Premised on art scheme, the detailed implementation method and specific operation process are given, but the protection scope of the utility model is not It is limited to the present embodiment.

The structural block diagram of Fig. 1 for a kind of phase of the embodiments of the present invention protective device, Fig. 2 are the reality of the utility model With applying a kind of phase of the example circuit diagram of protective device, as depicted in figs. 1 and 2, the structure of the utility model, including power module 3, signal acquisition process module 1, main control module and trip signal output module 5, signal acquisition process module 1 include for acquiring The current transformer of zero-sequence current, is put the current-to-voltage converting circuit for the current signal of acquisition to be converted to voltage signal Big circuit and converter, current transformer are connected through filter with current-to-voltage converting circuit, current-to-voltage converting circuit warp Amplifying circuit is connected with converter, and converter is connected with main control module, main control module and 5 phase of trip signal output module Even, main control module is also connected with clock module 2.Preferably, trip signal output module 5 includes photoelectric isolating circuit and relay Device, photoelectric isolating circuit input terminal are connected with main control module, and photoelectric isolating circuit output end is connected with relay input terminal, relay Device output end is connected with alarm, and when mutually and terra short failure occurs, current sensor collects zero-sequence current (leakage current), And by this electric current successively through being set if collection value is greater than in filter, current-to-voltage converting circuit, converter input main control module Definite value and retention time are greater than delay time, then main control module output pulse signal, and control relay exports trip signal.

Main control module is also connected with human-computer interaction module 4, for checking fault message and setting parameter, for example sets Constant voltage value and delay time.

The communication module 6 for remote transmission fault message is also connected on main control module, communication module 6 is logical for RS485 Communication interface.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than limit it System, although the utility model has been described in detail with reference to the preferred embodiment, those skilled in the art should manage Solution: it still can be with the technical solution of the present invention is modified or equivalently replaced, and these are modified or equally replace Changing also cannot make modified technical solution be detached from the spirit and scope of the technical scheme of the present invention.

Claims

1. a kind of phase ground protective device, it is characterised in that: including power module, signal acquisition process module, main control module and jump Lock signal output module, the signal acquisition process module include for acquiring the current transformer of zero-sequence current, for that will adopt The current signal of collection is converted to the current-to-voltage converting circuit, amplifying circuit and converter of voltage signal, the Current Mutual Inductance Device is connected through filter with the current-to-voltage converting circuit, the current-to-voltage converting circuit through the amplifying circuit with it is described Converter is connected, and the converter is connected with the main control module, and the main control module and the trip signal export mould Block is connected, and the main control module is also connected with clock module.

2. a kind of phase according to claim 1 ground protective device, it is characterised in that: the trip signal output module includes Photoelectric isolating circuit and relay, the photoelectric isolating circuit input terminal are connected with the main control module, the Phototube Coupling electricity Road output end is connected with the relay input terminal, and the relay output end is connected with alarm.

3. a kind of phase according to claim 1 ground protective device, it is characterised in that: the main control module also with human-computer interaction Module is connected.

4. a kind of phase according to claim 1 ground protective device, it is characterised in that: be also connected with use on the main control module In the communication module of remote transmission fault message, the communication module is RS485 communication interface.