CN103592578A - High-voltage insulation tester of cable - Google Patents

Abstract

The present invention discloses a high-voltage insulation testing device for a cable. The cable connector of the cable has odd-numbered terminals and even-numbered terminals. The testing device includes: a device connector with terminals corresponding to the odd-numbered terminals Odd-numbered interface, an even-numbered interface corresponding to the even-numbered terminal; several first wires, one end of which is respectively connected to the odd-numbered interface one by one, and the other end is collected at the first contact point; several second wires, One end is respectively connected to the even-numbered interface one by one, and the other end is collected at the second contact point; a DC power supply is selectively connected between the first contact point and the second contact point; a display unit is electrically connected between the first contact and the second contact; a high-voltage tester, which is selectively connected between the first contact and the second contact, the high-voltage tester has a current test unit and a resistance test unit, Test the leakage current and resistance of cables under high voltage respectively.

Description

High Voltage Insulation Tester for Cables

【Technical field】

The invention relates to a cable testing device, in particular to a cable high-voltage insulation testing device. the

【Background technique】

In the use of cables, it is often necessary to perform high voltage insulation tests on them. The high-voltage insulation test usually uses a high-voltage tester to test whether the leakage current of the cable is small enough to meet the standard and whether its impedance is large enough to meet the standard under high voltage conditions. the

At present, when carrying out high-voltage and insulation tests on cables, the shell of the connector of the cable is usually knocked open to expose the connector terminals, and a high-voltage tester is used to perform high-voltage insulation tests on adjacent connector terminals respectively. A cable with N terminal connectors needs to be tested N-1 times, which is cumbersome and time-consuming to test. the

In view of this, it is necessary to develop a cable high voltage insulation testing device to solve the above problems. the

【Content of invention】

Therefore, the object of the present invention is to provide a high-voltage insulation testing device for cables, which solves the problems of cumbersome testing methods, time-consuming and labor-intensive testing of cables in the prior art. the

In order to achieve the above object, the present invention provides a high-voltage insulation testing device for cables. One end of the cable has a cable connector, and the cable connector has odd-numbered terminals and even-numbered terminals. The testing device includes:

A device connector, which has an odd-numbered interface corresponding to the odd-numbered terminal, and an even-numbered interface corresponding to the even-numbered terminal;

A plurality of first wires, one end of which is respectively connected to the odd-numbered interface one by one, and the other end is collected at the first contact;

A plurality of second wires, one end of which is respectively connected to the even-numbered interface one by one, and the other end is collected at the second contact;

a DC power source selectively connected between the first contact and the second contact;

a display unit electrically connected between the first contact and the second contact;

A high-voltage tester is selectively connected between the first contact and the second contact. The high-voltage tester has a current test unit and a resistance test unit, which respectively test the leakage current and resistance value of the cable under high voltage. the

Optionally, the display unit is also connected in series with a switch. the

Optionally, the display unit is a light emitting diode. the

Optionally, the DC power supply voltage is 3-5V. the

Optionally, the high voltage used by the high voltage tester is selected from DC or AC power sources of 150V, 250V, 500V. the

Compared with the prior art, when testing, the DC power supply is connected between the first contact and the second contact, the switch is closed, and if the light-emitting diode lights up, it means that the device connector has an odd number. There is no short-circuit between the bit interface and the even-numbered bit interface, and then insert the cable connector into the device connector, if the light-emitting diode is still glowing, it means that there is no short-circuit between the odd-numbered bit terminals and the even-numbered bit terminals of the cable connector ; Then remove the DC power supply and replace it with a high-voltage tester connected between the first contact and the second contact, if the results tested by the current test unit and the resistance test unit all meet the standard, then High voltage insulation test passed. It can be seen that using the high-voltage insulation testing device for cables of the present invention, since the odd-numbered terminals and even-numbered terminals of the cable connector are finally collected at the first contact and the second terminal through the device connector Contacts, so the test is more convenient, and the number of tests is less, saving time. the

【Description of drawings】

FIG. 1 is a schematic diagram of a module structure of a manual switch battery circuit connected to a system and a battery according to the present invention. the

【Detailed ways】

In order to achieve the above object, the present invention provides a high-voltage insulation testing device for cables. One end of the cable 10 has a cable connector 20, and the cable connector 20 has an odd-numbered terminal 21 and an even-numbered terminal 22. The test Devices include:

A device connector 30, which has an odd-number interface 31 corresponding to the odd-number terminal 21, and an even-number interface 32 corresponding to the even-number terminal 22;

A plurality of first wires 40, one end of which is respectively connected to the odd-numbered interface 31 one by one, and the other end is collected at the first contact 50;

A plurality of second wires 60, one end of which is respectively connected to the even-numbered bit interface 32 one by one, and the other end is collected at the second contact point 70;

DC power supply 80, which is selectively connected between the first contact 50 and the second contact 70;

a display unit, which is electrically connected between the first contact 50 and the second contact 70;

A high-voltage tester 100, which is selectively connected between the first contact 50 and the second contact 70, the high-voltage tester 100 has a current test unit 101 and a resistance test unit 102, which test the voltage of the cable 10 under high voltage respectively. leakage current and resistance value. the

Wherein, the display unit may also be connected in series with a switch 110 for protecting the display unit. the

Wherein, the display unit may be a light emitting diode 90 . the

Wherein, the voltage of the DC power supply 80 may be 3-5V. the

Wherein, the high voltage used by the high voltage tester 100 can be selected from 150V, 250V, 500V DC or AC power supply. the

When testing, connect the DC power supply 80 between the first contact 50 and the second contact 70, close the switch 110, and if the LED 90 lights up, it means that the odd-numbered position of the device connector 30 is There is no short circuit between the interface 31 and the even-numbered interface 32, and then the cable connector 20 is inserted into the device connector 30, if the light-emitting diode 90 still glows, it means that the odd-numbered terminal 21 of the cable connector 20 is There is no short circuit with the even-numbered terminal 22; then the DC power supply 80 is removed, and the high voltage tester 100 is connected between the first contact 50 and the second contact 70 instead, if the current test unit 101, If all the test results of the resistance test unit 102 meet the standard, the high voltage insulation test is passed. the

The standard of the high voltage insulation test requires that the leakage current is less than a first preset value (for example, 1mA), and the resistance thereof is greater than a second preset value (for example, 20MΩ). Because this method is compared with the previous two adjacent odd-numbered terminals 21 and even-numbered terminals 22, it is equivalent to connecting more resistors in parallel, and the voltage at both ends remains unchanged, so its leakage current is greater than that in single-measurement Leakage current, if the leakage current measured at this time is still less than the first preset value, the single test must pass. In the same way, for the resistance test, since more resistors are connected in parallel, its resistance value must be smaller than the resistance in the single test. If the resistance at this time is still greater than the second preset value, the single test must pass. the

When using the test device of the present invention to actually test the cable 10, the leakage current is 0.034mA, and the test is passed, and the corresponding leakage current is 0.021mA in a single test, and it can pass naturally; the resistance value of the resistor is 13.5GΩ , the resistance value of the corresponding single-measurement resistance is 26GΩ, so it can be passed naturally. 

It can be seen that using the high-voltage insulation testing device for cables of the present invention, since the odd-numbered terminals 21 and even-numbered terminals 22 of the cable connector 20 are finally collected at the first contact 50 through the device connector 30 and the second contact 70, so the test is more convenient, and the number of tests is less, so as to save time. the

Claims (5)

1. A high-voltage insulation testing device for a cable, one end of the cable has a cable connector, and the cable connector has an odd-numbered terminal and an even-numbered terminal, it is characterized in that the testing device includes: a device connector having odd-numbered interfaces corresponding to the odd-numbered terminals and even-numbered interfaces corresponding to the even-numbered terminals; A plurality of first wires, one end of which is respectively connected to the odd-numbered interface one by one, and the other end is collected at the first contact; A plurality of second wires, one end of which is respectively connected to the even-numbered interface one by one, and the other end is collected at the second contact; a DC power source selectively connected between the first contact and the second contact; a display unit electrically connected between the first contact and the second contact; A high-voltage tester is selectively connected between the first contact and the second contact. The high-voltage tester has a current test unit and a resistance test unit, which respectively test the leakage current and resistance value of the cable under high voltage. 2 . The high-voltage insulation testing device for cables according to claim 1 , wherein a switch is connected in series to the display unit. 3 . 3. The high-voltage insulation testing device for cables according to claim 1, wherein the display unit is a light emitting diode. 4 . The high-voltage insulation testing device for cables according to claim 1 , wherein the DC power supply voltage is 3-5V. 5. The high-voltage insulation testing device for cables according to claim 1, wherein the high voltage used by the high-voltage tester is selected from DC or AC power sources of 150V, 250V, and 500V.