CN217820725U - Remote electric leakage test module of high-voltage explosion-proof switch of coal mine based on field bus communication - Google Patents

Abstract

The utility model relates to a based on long-range electric leakage test module of field bus communication colliery high pressure explosion-proof switch, including resistance-capacitance parallel module, power module, two normally closed relays, switching value input binding post, switching value output binding post, field communication bus, CPU control module and isolation module of opening. This practicality adopts two kinds of modes to realize long-range electric leakage test, one kind is through switching value input binding post, CPU control module detects and opens into test signal, another kind of CPU control module passes through field communication bus receiving test signal, it accomplishes electric leakage test to receive signal control relay break-make, do not need protector cooperation self to have just realized long-range electric leakage test, can also detect this time electric leakage test whether successful, and report to the control host computer in a long-range way, do not influence manual electric leakage test simultaneously, power supply system's safety has been ensured.

Description

Remote electric leakage test module of coal mine high-voltage explosion-proof switch based on field bus communication

The technical field is as follows:

the utility model relates to a mine power supply electric control technical field especially relates to a based on long-range electric leakage test module of field bus communication colliery high pressure explosion-proof switch.

The background art comprises the following steps:

in the colliery power supply system in the pit, high-pressure explosion-proof switch is as the essential equipment of colliery production, and market demand is very stable all the time, but present high-pressure explosion-proof switch product technology comes from the last 90 s of century, and though the producer carries out local improvement, owing to lack professional research and development team, the whole technical level of product has laggard behind relatively, and colliery power supply regulation requires high-pressure explosion-proof switch to do the electric leakage test regularly, and the electric leakage test of high-pressure explosion-proof switch is done the electric leakage test button of arranging the operating personnel to press on the door at present stage and is realized.

The CN216209696U coal mine high-voltage explosion-proof switch remote leakage test module applied by the applicant in the prior art solves the problem existing in the leakage test of the traditional high-voltage explosion-proof switch, and solves the problem that the traditional high-voltage explosion-proof switch is difficult to realize the application scene of the remote leakage test.

The utility model has the following contents:

the utility model aims at: the utility model provides a remote leakage test module of colliery high-voltage explosion-proof switch based on field bus communication, module and integrated protection ware are completely independent, can produce true leakage voltage current signal through field bus communication or switching value input control module to accomplish remote leakage test, this module includes super wide voltage input power module, CPU control module, field communication bus module, switching value input binding post, switching value output binding post, through field bus binding post or switching value input binding post, control leakage test module, required zero sequence protection voltage current signal when producing high-voltage explosion-proof switch integrated protection device leakage protection action, effectively solves traditional high-voltage explosion-proof switch and hardly realizes remote leakage test application scene.

The utility model provides a based on long-range electric leakage test module of field bus colliery high pressure explosion-proof switch, including super wide voltage input power module, CPU control module, two normally closed relays that open, switching value input binding post, switching value output binding post, field communication bus. The CPU control module is respectively connected with the power supply module, the switching value input connecting terminal, the two normally-open normally-closed relays and the field communication bus through the isolation module.

The resistance-capacitance parallel module has the resistance value of 12kV omega, the power of 2w, the capacitance value of an iron-clad oil-immersed capacitor of 20UF and the withstand voltage value of a capacitor of 160V, the resistance-capacitance parallel module is welded and welded with a lead, one end of the lead is connected with a zero sequence current transformer test winding, and the other end of the lead is connected with the normally-open points of two normally-open normally-closed relays.

When one pair of normally closed points of the two normally open normally closed relays are in a closed position, the normally closed points are used for sending zero sequence voltage from the voltage transformer to a zero sequence voltage interface of the comprehensive protector, when the normally closed points are disconnected in the test process, and when the two pairs of normally open points are normally in an open position, one end of each of the two pairs of normally open points is connected with any phase voltage in three phase voltages from the voltage transformer in parallel, the other end of each of the two pairs of normally open points is connected with the resistor-capacitor parallel module, the other end of each of the other pair of normally open points is connected with the zero sequence voltage interface of the comprehensive protector, and in the test process, the two pairs of normally open points are closed simultaneously, one phase voltage is sent to the comprehensive protector, and a zero sequence current transformer test winding is connected simultaneously, so that zero sequence fault current is generated.

The ultra-wide voltage input power supply module converts input alternating voltage into 5V direct voltage, the module can normally work within the range of 40V to 160V of the alternating voltage, and the 5V direct voltage is used for driving a relay coil, so that a leakage test can be realized only by providing a pair of idle contacts for a protector and a leakage test button, and the leakage test module can receive a remote leakage test signal sent by a field bus.

The switching value input connecting terminal provides a working power supply for the whole leakage test module on one hand, provides a test signal for the leakage test module on the other hand, receives the leakage test signal from the leakage test button or the comprehensive protector or sends a remote leakage test signal through a field bus, and the leakage test module controls the switching value action so as to generate a fault zero sequence current and voltage signal.

The switching value output connecting terminal provides the zero sequence voltage from the voltage transformer to the comprehensive protector, when a leakage test button is pressed down or a field bus receives a leakage test signal, the CPU control module controls the relay to be closed, and phase voltage from the voltage transformer is sent to a zero sequence voltage input port of the protector and a test winding of the zero sequence current transformer, so that the protector receives a real zero sequence current voltage signal.

Wherein, the CPU control module adopts STM32L431RCT6 of the Italian semiconductor company as a main control CPU.

The resistance-capacitance parallel module, the power supply module, the two normally-open normally-closed relays, the input wiring terminal, the output wiring terminal, the field communication bus and the CPU control module are welded on the PCB to form the switch remote leakage test module.

The utility model has the advantages that: compared with the prior art, the utility model discloses a dual mode realizes long-range electric leakage test module, one kind is through input binding post, CPU control module detects to open into test signal, another kind of CPU control module passes through field communication bus and receives test signal, it accomplishes the electric leakage test to receive the break-make of signal control relay, compare with former patent, the biggest difference does not need protector cooperation self just to have realized long-range electric leakage test, can also detect whether this electric leakage test succeeds, and report to the control host computer long-rangely, do not influence manual electric leakage test simultaneously, the safety of power supply system has been ensured.

Description of the drawings:

fig. 1 is that the utility model discloses a based on long-range electric leakage test module of fieldbus communication colliery high pressure explosion-proof switch.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

The coal mine high-voltage explosion-proof switch remote leakage test module based on the field bus shown in figure 1 comprises an ultra-wide voltage input power supply module, a CPU control module, a switching value input connecting terminal, a switching value output connecting terminal, a resistance-capacitance parallel module, a field communication bus and an isolation module.

The relay in the figure has two groups of normally open points and two groups of normally closed points, when one pair of normally closed points is in a closed position, the relay is used for sending zero sequence voltage from a voltage transformer to a zero sequence voltage interface of the comprehensive protector, in the test process, the normally closed point is disconnected, when two pairs of normally open points are in an open position, one end of the two pairs of normally open points is connected with any phase voltage in the three phase voltage from the voltage transformer in parallel, the other end of the one pair of normally open points is connected with a resistance-capacitance parallel module, the other end of the other pair of normally open points is connected with the zero sequence voltage interface of the comprehensive protector, in the test process, the two pairs of normally open points are simultaneously closed, one phase voltage is sent to the comprehensive protector, and simultaneously a zero sequence current transformer test winding is connected, so that zero sequence fault current is generated, a relay action coil adopts 5V direct current voltage, and only one pair of idle contacts is needed for external control.

In the figure, a power supply module is an ultra-wide voltage input, the module can normally work within the range of 40V to 160V of input alternating voltage, and 5V direct current voltage is output and used for a relay action power supply.

In the figure, a resistance-capacitance parallel module adopts a metal film resistor, the resistance value is 12kV omega, the power is 2w, an iron-clad oil-immersed capacitor is adopted, the capacitance value of the capacitor is 20UF, the withstand voltage value of the capacitor is 160V, a lead wire is welded in parallel by the resistance capacitor, one end of the lead wire is connected with a zero sequence current transformer test winding, and the other end of the lead wire is connected with a normally-on point of a relay.

The field communication bus in the figure adopts a two-wire RS-485 differential communication mode, has strong anti-interference capability and long communication distance, can set communication baud rate to adapt to different occasion requirements, has simple wiring, only two wires for external connection, namely 485-A and 485-B signal differential wires, and is connected with a CPU control module through photoelectric isolation.

In the figure, a CPU control module receives two-mode electric leakage control test signals in real time, STM32L431RCT6 of an ideological semiconductor company is used as a main control CPU, the CPU control module is powered by a 5V isolation module, a switching value input signal is connected to an input IO port of the CPU after being isolated by photoelectricity, a field bus communication signal is connected to a communication input port of the CPU after being isolated by photoelectricity, an output IO port of the CPU is connected with a relay action driving circuit, when the main control CPU detects the electric leakage control test signals in real time, the output IO port acts to drive a test relay to act, and therefore an electric leakage test is completed.

The utility model discloses a long-range electric leakage test module, input signal come from voltage transformer and relay control signal, and the output is zero sequence voltage and zero sequence current excitation signal, and all devices are installed on a PCB board, and PCB board mounting dimension is the exact same with the parallelly connected module of resistance-capacitance, during the actual application, can seamlessly replace the parallelly connected module of resistance-capacitance.

While the foregoing description is directed to particular embodiments of the present invention, various modifications and alterations may be made without departing from the spirit and scope of the invention, as those skilled in the art will recognize from the foregoing description and, therefore, all changes and modifications that fall within the true spirit and scope of the invention.

Claims (3)

1. The utility model provides a long-range electric leakage test module of colliery high pressure explosion-proof switch based on field bus communication, including resistance-capacitance parallel module, power module, two normally closed relays that open, switching value input binding post and switching value output binding post, switching value input binding post respectively with two normally closed relays that open, power module links to each other, two normally closed relays that open respectively with resistance-capacitance parallel module, switching value output binding post links to each other, resistance-capacitance parallel module links to each other with switching value output binding post, its characterized in that: the on-site communication system further comprises an on-site communication bus, a CPU control module and an isolation module, wherein the CPU control module is respectively connected with the power module, the switching value input wiring terminal, the two normally-open normally-closed relays and the on-site communication bus through the isolation module.

2. The coal mine high-voltage explosion-proof switch remote leakage test module based on fieldbus communication of claim 1, characterized in that: and the resistance-capacitance parallel module, the power supply module, the two normally-open normally-closed relays, the switching value input connecting terminal, the switching value output connecting terminal, the field communication bus, the CPU control module and the isolation module are welded on the PCB.

3. The coal mine high-voltage explosion-proof switch remote leakage test module based on fieldbus communication of claim 2, characterized in that: the CPU control module adopts STM32L431RCT6 as a main control CPU.

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