CN111323664B - High tension switchgear test module - Google Patents

High tension switchgear test module Download PDF

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Publication number
CN111323664B
CN111323664B CN202010189704.3A CN202010189704A CN111323664B CN 111323664 B CN111323664 B CN 111323664B CN 202010189704 A CN202010189704 A CN 202010189704A CN 111323664 B CN111323664 B CN 111323664B
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voltage
terminal
contact
circuit
detection unit
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CN111323664A (en
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沈建位
沈鑫刚
陈罡
郭德强
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Ningbo Intelligent Manufacturing Technology Research Institute Co ltd
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Ningbo Polytechnic
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416—Connectors, terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention belongs to the field of high-voltage switch cabinet tests, and provides a high-voltage switch cabinet test module which is used for solving the problems of misoperation and inconvenient operation existing in the active measurement of a secondary circuit of a high-voltage switch cabinet by a multimeter in the debugging process, and the high-voltage switch cabinet test module comprises: the control circuit, the control switch KK, the circuit detection unit XS and the high-voltage electrified detection unit GY are connected with the control circuit; the circuit detection unit XS and the high-voltage electrified detection unit GY are electrically connected with the control circuit; the circuit detection unit XS is used for detecting a preset connection state of the external circuit of the high-voltage switch cabinet and measuring the voltage of the external circuit of the high-voltage switch cabinet; and the high-voltage live detection unit GY is used for outputting a preset voltage and detecting whether the connection of the external circuit of the high-voltage switch cabinet is preset correct connection or not under the preset voltage. This module can realize that external circuit's break-make is measured, voltage measurement and high-voltage live detection, improves experimental convenience and work efficiency effectively.

Description

High tension switchgear test module
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a high-voltage switch cabinet test module.
Background
The high-voltage switch cabinet is important control and protection equipment of a power system, and plays an important role in safe and reliable operation of the power system. Therefore, the power system has high requirements on the reliability and strict quality control. Each product must be strictly tested according to relevant national and industrial standards to meet the requirements of design and standards before being available to users.
In the secondary circuit debugging of a high-voltage switch cabinet, when a circuit has a fault, the problem is generally searched by measuring circuit parameters by a universal meter at present, corresponding functional gears such as a resistance gear and a voltage gear are switched according to needs during the measurement of the universal meter, and a measurement result is checked through a meter head or a liquid crystal display screen. In the using process, gear conversion is troublesome, misoperation exists, and the multimeter can be damaged if voltage is measured during resistance gear; the display screen of the multimeter also has the problem of inconvenient viewing.
In addition, the high-voltage live display function test in the test process of the high-voltage switch cabinet is a test by adding simulated high voltage on site at present, the correctness of the circuit can be verified only by actual power-on operation under the condition of not simulating the high voltage, and the high-voltage test after the actual power-on operation is well installed fails, so that the further problems of disassembly and maintenance are caused, the operation is complex, and the problem of complete debugging of the high-voltage switch cabinet before use is not solved.
Therefore, a high-voltage switch cabinet test module which is not required to be connected with a universal meter for secondary circuit debugging needs to be designed, and the problems are solved.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a high-voltage switch cabinet test module which can detect the on-off measurement, voltage measurement and high-voltage live detection functions of a control loop of a high-voltage switch cabinet, and can automatically switch the on-off measurement and voltage measurement functions of the circuit according to the connection state of an external circuit.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-voltage switch cabinet test module comprises a control circuit and a control switch KK, and is characterized by further comprising a circuit detection unit XS and a high-voltage electrified detection unit GY; the circuit detection unit XS and the high-voltage electrified detection unit GY are electrically connected with the control circuit;
the circuit detection unit XS is used for detecting a preset connection state of a control loop of the high-voltage switch cabinet and measuring the voltage of an external circuit of the high-voltage switch cabinet;
and the high-voltage live detection unit GY is used for outputting a preset voltage and detecting whether the connection of the high-voltage live display circuit of the high-voltage switch cabinet is preset correct connection or not under the preset voltage.
Further, the circuit detection unit XS detects preset connection states of the external circuit of the high-voltage switch cabinet, including a preset short circuit state, a preset open circuit state and a preset load state.
Further, the circuit detection unit XS detects that the voltage of the high-voltage switch cabinet control loop is an alternating-current voltage of the high-voltage switch cabinet control loop or a direct-current voltage of the high-voltage switch cabinet control loop or an induced voltage of the high-voltage switch cabinet control loop.
Further, the circuit detection unit XS includes a terminal X1, a terminal X2, a terminal X3, a buzzer HA, a light emitting diode D3, a third relay K3, a zener diode DX, a resistor RX, a capacitor CX, a first contact K31 of the third relay K3, a second contact K32 of the third relay K3, a voltmeter header V including a V1 terminal, a V2 terminal, and a V3 terminal, a third switch S3, and the third switch S3 including a first contact S31 of the third switch S3 and a second contact S32 of the third switch S3;
the terminal X2 is connected with one end of a buzzer HA and the anode of a light-emitting diode D3, and the other end of the buzzer HA is connected with one end of a relay K3, the anode of a voltage stabilizing diode DX, the V3 end of a voltage meter head V and a terminal X1;
the terminal X3 is connected to one end of the first contact S31 and one end of the second contact S32 of the third switch S3, the other end of the first contact S31 is connected to one end of the first contact K31 of the third relay K3, the second contact K32 of the third relay K3, and one end of the capacitor CX, the other end of the first contact K31 of the third relay K3 is connected to the V1 end of the voltmeter head V and the other end of the second contact S32 of the third switch S3, the other end of the second contact K32 of the third relay K3 is connected to the V2 end of the voltmeter head V, the other end of the capacitor CX is connected to one end of the resistor RX, and the other end of the resistor RX is connected to the negative electrode of the light emitting diode D3, one end of the third relay K3, and the negative electrode of the zener diode DX.
Further, the high-voltage electrification detecting unit GY comprises a terminal Y1, a terminal Y2, a terminal Y3, a terminal Y4, an operational amplifier U1, a capacitor C1, a capacitor C2, a resistor R2, a resistor R3, a resistor R4 and a resistor R5;
the terminal Y3 is connected to the 3-terminal of the operational amplifier U1, the terminal Y1 is connected to the 4-terminal of the operational amplifier U1, the terminal Y2 is connected to the 5-terminal of the operational amplifier U1, the terminal Y4 is connected to one terminal of the resistor R5, one terminal of the capacitor C2, and one terminal of the resistor R3, the other terminal of the resistor R3 is connected to the 1-terminal of the operational amplifier, the other terminal of the capacitor C2 is connected to one terminal of the resistor R2, the other terminal of the resistor R2 is connected to one terminal of the capacitor C1, the other terminal of the capacitor C1 is connected to one terminal of the resistor R4, and the other terminal of the resistor R4 is connected to one terminal of the resistor R5 and the 2-terminal of the operational amplifier U1.
Further, the control circuit includes a fuse F1, a first resistor R1, a first diode D1, a second diode D2, a first relay K1, a second relay K2, a power source E, a lamp HL, a first switch S1, a second switch S2, a wiring hole XS1, a wiring hole XS2, a wiring hole GY1, and a wiring hole GY 2; the control switch KK comprises a contact 1, a contact 2, a contact 3, a contact 4, a contact 5, a contact 6, a contact 7 and a contact 8;
the connecting hole GY1 is connected with the contact 1, the connecting hole GY2 is connected with the contact 7, the connecting hole XS1 is connected with the contact 3, and the connecting hole XS2 is connected with the contact 5;
the contact 2 is connected with a terminal Y3 of a high-voltage live detection unit GY, a terminal Y4 of the high-voltage live detection unit GY is connected with a contact 8, a terminal Y1 of the high-voltage live detection unit GY is connected with one end of a normally closed contact of a first relay K1, one end of a lamp HL and one end of a second switch S2, a terminal Y2 of the high-voltage live detection unit GY is connected with one end of a second relay K2, one end of a first switch S1, the negative pole of a power supply, a terminal X3 of a circuit detection unit, one end of a first relay K1, the positive pole of a second diode D2 and a contact 6 of a control switch KK;
the contact 4 is connected with one end of a fuse F1, the other end of the fuse F1 is connected with one end of a first resistor R1 and a terminal X1 of a circuit detection unit XS, the other end of a first resistor R1 is connected with the negative electrode of a first diode D1, the positive electrode of the first diode D1 is connected with the other end of a first relay K1 and the negative electrode of a second diode D2, the terminal X2 of the circuit detection unit XS is connected with one end of a normally open contact of a second relay K2, and the other end of the normally open contact of the second relay K2 is connected with the other end of a second switch S2 and the positive electrode of a power supply E.
Furthermore, a rotatable operating handle is arranged on the control switch KK.
Furthermore, the circuit detection unit is fixedly connected with a test wire for detecting the high-voltage switch cabinet test module according to a preset fixing mode.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) this application design high tension switchgear test module has functions such as circuit break-make measurement, alternating current-direct current voltage measurement, high voltage live detection, illumination, for making things convenient for the tester to look over the convenience, and circuit detecting element is in the same place with the test wire is installed, removes along with the test wire, guarantees all to be in operator visual range when the test, can effectively improve experimental convenience, improves experimental work efficiency.
(2) Through getting electric and cutting off the power supply of relay K1, realize that circuit break-make measurement and voltage measurement function can be according to external circuit automatic switch.
(3) The design comes the illumination function, and the convenience is debugged under the environment of light deficiency.
(4) The induction voltage judgment circuit is designed to solve the problem of induction voltage test of the control loop of the high-voltage switch cabinet.
(5) The high-voltage live detection circuit is designed, sinusoidal alternating voltage with the frequency of 50 Hz can be generated, and the debugging problem of the high-voltage live display product is solved.
(6) The operating handle of the control switch and the position of the wire inserting hole are arranged, so that the test wire can be effectively prevented from being mistakenly connected, and the test module is protected.
Drawings
FIG. 1 is a working system diagram of the high-voltage switch cabinet test module;
FIG. 2 is a schematic circuit diagram of the high voltage switchgear test module;
FIG. 3 is a circuit schematic of the circuit detection unit;
fig. 4 is a schematic circuit diagram of the high voltage electrification detecting unit.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Examples
A high-voltage switch cabinet test module comprises a control circuit and a control switch KK, and is characterized by further comprising a circuit detection unit XS and a high-voltage electrified detection unit GY; the circuit detection unit XS and the high-voltage electrified detection unit GY are electrically connected with the control circuit;
as shown in fig. 2, the high-voltage switch cabinet test module circuit is composed of a control switch KK, a circuit detection unit XS, a high-voltage electrified detection unit GY, and a control circuit.
The circuit detection unit XS is used for detecting a preset connection state of an external circuit of the high-voltage switch cabinet and measuring the voltage of a control loop of the high-voltage switch cabinet; as shown in fig. 3, the connection of the terminal X2, the buzzer HA, the light emitting diode D3, the relay coil K3 and the terminal X1 in the circuit detection unit can realize the detection of the preset connection state of the high-voltage switch cabinet control loop, including the preset short-circuit state, the preset open-circuit state and the preset load state; the terminal X3, the switch S3, the capacitor CX, the resistor RX, the voltage stabilizing diode DX, the relay K3 and the voltage gauge head V in the circuit detection unit can realize the measurement of the voltage of the control loop of the high-voltage switch cabinet.
The specific working principle is as follows:
as shown in fig. 1, the circuit detecting unit XS and the high voltage live detecting unit GY are both connected to the control circuit, wherein the circuit detecting unit XS and the testing wires connected to the wiring holes XS1 and XS2 are fixed together according to a preset fixing manner, wherein the circuit detecting unit XS and the testing wires can be fixed together by using a fixing clip or a wire, so that the circuit detecting unit and the testing wires are mounted together and move along with the testing wires to ensure that the circuit detecting unit and the testing wires are within the visual range of an operator during testing.
The function selection of the high-voltage switch cabinet test module is determined by a control switch KK, the control switch KK comprises a contact 1, a contact 2, a contact 3, a contact 4, a contact 5, a contact 6, a contact 7 and a contact 8, when a rotatable operating handle of the control switch KK is in a position shown in figure 1, the positions of wiring holes GY1 and GY2 are blocked by the operating handle, a test wire can only be inserted into the wiring holes XS1 and XS2, and a circuit detection unit XS is currently connected to the high-voltage switch cabinet test module; when the operating handle of the control switch KK is in a parallel position, the positions of the wiring holes XS1 and XS2 are blocked by the operating handle, the test wire can only be inserted into the wiring holes GY1 and GY2, the high-voltage switch cabinet test module is currently connected with the high-voltage live-line detection unit GY, and the error connection of the test wire can be avoided due to the design of the operating handle and the wiring hole.
According to the test requirement, a test circuit corresponding to the control switch KK is selected, as shown in FIG. 2, when an operating handle of the control switch is in a position 1, the contacts 3-4 and 5-6 are connected, the test module of the high-voltage switch cabinet can realize a circuit detection function, and the circuit can automatically complete circuit parameter test according to the conditions of external circuits connected with the contacts XS1 and XS 2.
In fig. 2, the coil rated voltage of the first relay K1 is 24V, and the coil rated voltage of the second relay K2 is direct current 9V; f1 is a fuse; r1 is a current limiting resistor; the first diode D1 and the second diode D2 are zener diodes, the voltage withstanding value of the first diode D1 is 12V, and the voltage withstanding value of the second diode D2 is 24V; the power supply E is a 9V battery; HL is an illuminating lamp, and the rated voltage is 9V; the first switch S1 is a lighting switch, the second switch S2 is a test switch, XS is a circuit detecting unit, and GY is a high voltage live detecting unit.
The circuit detection unit XS is used for detecting a connection state of a control loop of the high-voltage switch cabinet and measuring voltage of the control loop of the high-voltage switch cabinet, wherein the connection state of the control loop of the high-voltage switch cabinet comprises a preset short-circuit state, a preset open-circuit state and a preset load state.
For the circuit detection unit XS to detect the connection state of the high-voltage switch control loop, that is, to measure the on/off state of the high-voltage switch control loop and to measure the on/off state of the external circuits connected to XS1 and XS2, the specific circuit principle is as follows: the testing line is contacted with a circuit to be tested in the high-voltage switch cabinet through the wiring hole XS1 and the wiring hole XS2, the second switch S2 is closed for testing, the power supply E forms a loop with a coil of the second relay K2 through a normally closed contact of the first relay K1, after the power supply is powered on, the coil of the second relay K2 acts, the normally open contact of the second relay K2 is delayed to be closed, and the power supply is formed by an E positive electrode → a relay K2 contact → a circuit detection unit terminal X2 → a circuit detection unit terminal X1 → a fuse F1 → a control switch contact 4 → a control switch contact 3 → a wiring hole XS1 → a circuit to be tested → an XS2 → a control switch contact 5 → a control switch contact 6 → a power supply E negative electrode to form a measuring circuit of the circuit detection unit.
Further, as shown in fig. 3, the internal circuit of the circuit detecting unit is connected between the circuit detecting unit terminals X1 and X2, a zener diode DX is connected in parallel to both ends of the coil of the third relay K3, the light emitting diode D3 and the coil of the third relay K3 are connected in series and then connected to the terminal X2, and the other end of the coil of the third relay K3 is connected to the terminal X1.
The rated working voltage of the buzzer is 9V, the rated current of the light-emitting diode is 810mA, the rated voltage of a coil of the third relay K3 is 24V, and the coil resistance is 900 omega.
The current test circuit state can be determined based on the states of the buzzer HA and the light emitting diode D3 of the circuit detection unit XS, which are specifically as follows:
when the circuit to be tested is in a wire connection state (equivalent to short circuit), the voltage on the buzzer HA is 9V, and the current passing through the light emitting diode is
Figure GDA0003402922140000081
Therefore, the buzzer HA sounds, the light emitting diode D3 lights normally, and the tester can know that the circuit to be tested is in the direct connection state through the sound and the light.
When the circuit to be tested is in a lead disconnection state (equivalent to disconnection), at this time, the voltage on the buzzer HA is 0, and the current passing through the light-emitting diode D3 is 0, so that the buzzer HA cannot make a normal sound, the light-emitting diode D3 cannot light, and a tester can know that the circuit to be tested is in a disconnection state by no sound or no light.
When the circuit to be tested is in a loaded state, at the moment, due to the influence of load resistance, in a control loop of the high-voltage switch cabinet, the number of the loads is more than that of the relays, the resistance value of a coil of the high-voltage switch cabinet is between 1k omega and 10k omega, the low value of the coil is 1k omega, because the resistance value of a buzzer is 88 omega, most of power supply voltage is applied to the loads according to the circuit principle, and the voltage on the buzzer is applied to the load
Figure GDA0003402922140000082
The current through the LED is also reduced to
Figure GDA0003402922140000083
Therefore, the buzzer cannot sound, the light emitting diode D3 emits dark light, and the tester can know that the circuit to be tested is in the load connection state by the absence of sound and dark light.
According to the specific principle and the detection method for detecting the connection state of the control circuit of the high-voltage switch cabinet by the circuit detection unit XS, the circuit detection unit XS can realize the automatic switching of the on-off measurement (the connection state of the control circuit) and the voltage measurement function of the circuit according to the external circuit through the power on and power off of the first relay K1. The voltage measurement of the high-voltage switch cabinet control loop is alternating current voltage of the high-voltage switch cabinet control loop or direct current voltage of the high-voltage switch cabinet control loop or induction voltage of the high-voltage switch cabinet control loop.
The voltage measurement function is specifically as follows: the voltage of the external control loop of the XS1 and the XS2 is measured, the test line is contacted with the circuit to be tested, and the circuit detection unit terminal X1 → the fuse F1 → the control switch contact 4 → the control switch contact 3 → the wiring hole XS1 → the circuit to be tested → the wiring hole XS2 → the control switch contact 5 → the control switch contact 6 → the circuit detection unit terminal X3 form a circuit for measuring the voltage of the control loop.
As shown in fig. 3, the circuit detecting unit terminal X3 is connected to the junction of the zener diode DX and the led D3 through the first contact S31 of the third switch S3, the capacitor CX, and the resistor RX. The circuit detection unit end X3 is connected to the V1 end of the voltmeter head V through the second contact S32 of the switch S3, the V1 end is connected with the capacitor CX through the first contact K31 of the third relay K3, and the V2 end of the voltmeter head V is connected with the capacitor CX through the second contact K32 of the third relay K3. V3 of the voltmeter head V is connected with the circuit detection unit end X1, the withstand voltage value of the voltage stabilizing diode DX is 24V, and the rated voltage of the coil of the third relay K3 is 24V.
When the circuit to be tested is alternating-current voltage, at the moment, the external testing circuit forms a loop through a first contact S31 of a third switch S3, a capacitor CX, a resistor RX and a relay K3, a coil of a third relay K3 is electrified, a first contact K31 of a third relay K3 is closed, the voltage to be tested is added between a voltage meter head terminal V1 and a voltage meter head terminal V3, and the voltage meter head displays the alternating-current voltage value to be tested.
In a control loop of a high-voltage switch cabinet, induced voltage is generated sometimes, so that interference is caused to normal operation of a circuit, and the problem of how to judge whether the induced voltage is the circuit test is a difficult problem. In this example, when the voltmeter head V displays the measured ac voltage, the third switch S3 is pressed, the voltage to be measured is connected to the voltmeter head terminal V1 through the first contact S31 of the third switch S3, and the second contact S32 of the third switch S3 is disconnected from other circuits, because the induced voltage is characterized by a small capacity, and the voltage varies with the circuit load, so that the ac voltage measured twice changes greatly, and it can be determined that the voltage is the induced voltage if the difference between the measured values measured twice before and after the third switch S3 is large.
When the circuit to be tested is the direct current voltage, at this moment, because the direct current voltage can not pass through the external capacitor CX, the coil of the third relay K3 can not get power. The voltage to be measured is added between the voltage meter head terminals V2 and V3 through the second contact K31 of the third relay K3, and the voltage meter head displays the value of the direct-current voltage to be measured.
In order to prevent overvoltage and internal circuit short circuit during measurement, a fuse F1 is arranged in the circuit detection unit to protect the short circuit.
In the invention, if the voltage is suddenly added to the external circuit, the coil of the first relay K1 is electrified, the normally closed contact K1 corresponding to the first relay K1 is disconnected, the coil of the second relay K2 is electrified, the normally open contact corresponding to the second relay K2 is disconnected, the related circuits behind the normally closed contact K1 are disconnected, and the related circuits are protected from being damaged. Meanwhile, the circuit function is switched to a voltage measurement loop, and the automatic switching function of the measurement function is realized. Similarly, when the voltage of the external circuit is tested, the on-off test function of the circuit can be automatically switched. The voltage stabilizing diode D2 is used for ensuring the working voltage of a coil of the first relay K1, the voltage stabilizing diode D1 and the resistor R1 are used for preventing the power supply E from forming a loop through the coil of the first relay K1, the voltage of the power supply E is 9V, the voltage withstanding value of the voltage stabilizing diode D1 is 12V, the voltage of the power supply E is smaller than the voltage withstanding value of the voltage stabilizing diode D1, and the diode D1 cannot be conducted. Therefore, the power supply E cannot form a loop through the K1, and the accuracy of the on-off test of the circuit can be ensured.
And outputting a preset voltage to the high-voltage live detection circuit GY, and detecting whether the connection of the high-voltage live display circuit of the high-voltage switch cabinet is a preset correct connection or not under the preset voltage.
As shown in FIG. 2, when the rotary handle of the switch KK is at the 2 position, the contacts 1-2 and 7-8 are connected, and the test module can realize the circuit detection function. A second switch S2 is tested by pressing, the voltage of a power supply E is connected to terminals Y1 and Y2 of a high-voltage electrified detection unit GY, Y3 and Y4 of the high-voltage electrified detection unit work to generate sine-wave alternating voltage, the alternating voltage is connected to GY1 and GY2 wiring holes through control switch contacts, one end of a test wire is connected with GY1 and GY2 wiring holes, the other end of the test wire is connected with a corresponding wiring terminal of a product to be tested, and the simulation test of the high-voltage electrified display product can be realized. As shown in FIG. 4, the high-voltage electrification detecting unit consists of an operational amplifier U1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2. The terminal Y1 is connected to the 4 terminal of the operational amplifier U1, the terminal Y2 is connected to the 5 terminal of the operational amplifier U, and the operational amplifier U1 is provided with a working power supply; the resistor R2 and the resistor C1 are connected in series between the end 1 and the end 3 of the operational amplifier U1, the resistor R3 and the capacitor C2 are connected in parallel and are connected between the end 1 of the operational amplifier U1 and the terminal Y4, the resistor R4 is connected between the end 2 and the end 3 of the operational amplifier U1, and the resistor R5 is connected between the end 2 of the operational amplifier U1 and the terminal Y4. The values of the resistors R1 and R2 are 10k Ω, the values of the capacitors C1 and C2 are 0.32 μ F, the value of the resistor R4 is 4k Ω, and the value of the resistor R5 is 1.5k Ω.
The circuit working principle is that when the terminals Y1 and Y2 are connected with working power supply, the circuit works at the terminals Y3 and Y4 to generate sinusoidal alternating current voltage, and the frequency of the voltage is represented by the formula
Figure GDA0003402922140000111
It is determined that the voltage frequency can be obtained as
Figure GDA0003402922140000112
Therefore, the output voltage frequency is the same as the frequency of the power grid in China, and the real working condition can be simulated. The high-voltage live detection circuit is designed, sinusoidal alternating voltage with the frequency of 50 Hz can be generated, and the debugging problem of the high-voltage live display product is solved.
In the test process, due to the structure of a switch cabinet or on-site lighting, some circuits to be tested are in a dark environment, so that the test is inconvenient.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.

Claims (7)

1. A high-voltage switch cabinet test module comprises a control circuit and a control switch KK, and is characterized by further comprising a circuit detection unit XS and a high-voltage electrified detection unit GY; the circuit detection unit XS and the high-voltage electrified detection unit GY are electrically connected with the control circuit;
the circuit detection unit XS is used for detecting a preset connection state of a control loop of the high-voltage switch cabinet and measuring the voltage of an external circuit of the high-voltage switch cabinet;
the circuit detection unit XS comprises a terminal X1, a terminal X2, a terminal X3, a buzzer HA, a light emitting diode D3, a third relay K3, a zener diode DX, a resistor RX, a capacitor CX, a first contact K31 of the third relay K3, a second contact K32 of the third relay K3, a voltmeter header V, wherein the voltmeter header V comprises a V1 terminal, a V2 terminal, a V3 terminal and a third switch S3, and the third switch S3 comprises a first contact S31 of a third switch S3 and a second contact S32 of the third switch S3;
the terminal X2 is connected with one end of a buzzer HA and the anode of a light-emitting diode D3, and the other end of the buzzer HA is connected with one end of a relay K3, the anode of a voltage stabilizing diode DX, the V3 end of a voltage meter head V and a terminal X1;
the terminal X3 is connected to one end of the first contact S31 and one end of the second contact S32 of the third switch S3, the other end of the first contact S31 is connected to one end of the first contact K31 of the third relay K3, the second contact K32 of the third relay K3 and one end of the capacitor CX, the other end of the first contact K31 of the third relay K3 is connected to the V1 end of the voltmeter head V and the other end of the second contact S32 of the third switch S3, the other end of the second contact K32 of the third relay K3 is connected to the V2 end of the voltmeter head V, the other end of the capacitor CX is connected to one end of the resistor RX, and the other end of the resistor RX is connected to the negative electrode of the light emitting diode D3, one end of the third relay K3 and the negative electrode of the zener diode DX;
and the high-voltage live detection unit GY is used for outputting a preset voltage and detecting whether the connection of the high-voltage switch cabinet live display circuit is a preset correct connection or not under the preset voltage.
2. The high voltage switch cabinet test module as claimed in claim 1, wherein the circuit detection unit XS detects predetermined connection states of the high voltage switch cabinet control circuit including a predetermined short circuit state, a predetermined open circuit state and a predetermined load state.
3. The high voltage switch cabinet test module according to claim 1, wherein the circuit detection unit XS detects a voltage of the high voltage switch cabinet control loop as an ac voltage of the high voltage switch cabinet control loop or a dc voltage of the high voltage switch cabinet control loop or an induced voltage of the high voltage switch cabinet control loop.
4. The high-voltage switch cabinet test module as claimed in claim 1, wherein the high-voltage live-line detection unit GY comprises a terminal Y1, a terminal Y2, a terminal Y3 and a terminal Y4, an operational amplifier U1, a capacitor C1, a capacitor C2, a resistor R2, a resistor R3, a resistor R4 and a resistor R5;
the terminal Y3 is connected to the 3-terminal of the operational amplifier U1, the terminal Y1 is connected to the 4-terminal of the operational amplifier U1, the terminal Y2 is connected to the 5-terminal of the operational amplifier U1, the terminal Y4 is connected to one terminal of the resistor R5, one terminal of the capacitor C2, and one terminal of the resistor R3, the other terminal of the resistor R3 is connected to the 1-terminal of the operational amplifier, the other terminal of the capacitor C2 is connected to one terminal of the resistor R2, the other terminal of the resistor R2 is connected to one terminal of the capacitor C1, the other terminal of the capacitor C1 is connected to one terminal of the resistor R4, and the other terminal of the resistor R4 is connected to one terminal of the resistor R5 and the 2-terminal of the operational amplifier U1.
5. The high-voltage switch cabinet test module as claimed in claim 1, wherein the control circuit comprises a fuse F1, a first resistor R1, a first diode D1, a second diode D2, a first relay K1, a second relay K2, a power supply E, a lamp HL, a first switch S1, a second switch S2, a wiring hole XS1, a wiring hole XS2, a wiring hole GY1 and a wiring hole GY 2; the control switch KK comprises a contact 1, a contact 2, a contact 3, a contact 4, a contact 5, a contact 6, a contact 7 and a contact 8;
the connecting hole GY1 is connected with the contact 1, the connecting hole GY2 is connected with the contact 7, the connecting hole XS1 is connected with the contact 3, and the connecting hole XS2 is connected with the contact 5;
the contact 2 is connected with a terminal Y3 of a high-voltage live detection unit GY, a terminal Y4 of the high-voltage live detection unit GY is connected with a contact 8, a terminal Y1 of the high-voltage live detection unit GY is connected with one end of a normally closed contact of a first relay K1, one end of a lamp HL and one end of a second switch S2, a terminal Y2 of the high-voltage live detection unit GY is connected with one end of a second relay K2, one end of a first switch S1, the negative pole of a power supply, a terminal X3 of a circuit detection unit, one end of a first relay K1, the positive pole of a second diode D2 and a contact 6 of a control switch KK;
the contact 4 is connected with one end of a fuse F1, the other end of the fuse F1 is connected with one end of a first resistor R1 and a terminal X1 of a circuit detection unit XS, the other end of a first resistor R1 is connected with the negative electrode of a first diode D1, the positive electrode of the first diode D1 is connected with the other end of a first relay K1 and the negative electrode of a second diode D2, the terminal X2 of the circuit detection unit XS is connected with one end of a normally open contact of a second relay K2, and the other end of the normally open contact of the second relay K2 is connected with the other end of a second switch S2 and the positive electrode of a power supply E.
6. The high-voltage switch cabinet test module as claimed in claim 1, wherein the control switch KK is provided with a rotatable operating handle.
7. The high-voltage switch cabinet test module according to claim 1, wherein the circuit detection unit is fixedly connected with a test wire for detecting the high-voltage switch cabinet test module according to a preset fixing mode.
CN202010189704.3A 2020-03-18 2020-03-18 High tension switchgear test module Active CN111323664B (en)

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CH373467A (en) * 1957-12-23 1963-11-30 Siemens Ag Procedure for testing the stress on AC switching devices when interrupting currents and the arrangement for performing this procedure
JP2008252251A (en) * 2007-03-29 2008-10-16 Advantest Corp Switch circuit, signal output unit, and testing device
CN103543380B (en) * 2013-10-14 2016-07-13 广西三立科技发展有限公司 High-tension distribution box monitoring device
CN105676048B (en) * 2016-01-18 2018-11-02 国网山东省电力公司青岛供电公司 A kind of switch cabinet of converting station switch secondary circuit detection device
CN205753005U (en) * 2016-06-27 2016-11-30 吕晓平 A kind of auxiliary circuits in cabinet monitoring device
CN206270399U (en) * 2016-12-20 2017-06-20 国家电网公司 A kind of voltage circuit test circuit
CN206773133U (en) * 2017-04-27 2017-12-19 南宁市高照电器有限责任公司 Electric switch equipment combined test stand
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