CN115219807A - Lightning protection test and insulation test compatible circuit and electronic equipment - Google Patents
Lightning protection test and insulation test compatible circuit and electronic equipment Download PDFInfo
- Publication number
- CN115219807A CN115219807A CN202110425771.5A CN202110425771A CN115219807A CN 115219807 A CN115219807 A CN 115219807A CN 202110425771 A CN202110425771 A CN 202110425771A CN 115219807 A CN115219807 A CN 115219807A
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- relay
- resistor
- input terminal
- piezo
- lightning protection
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a compatible circuit for lightning protection test and insulation test and electronic equipment, wherein the compatible circuit comprises a first input terminal, a second input terminal, a first piezoresistor, a second piezoresistor, a third piezoresistor, a relay and a power module, one pole of the input end of the power module is connected to the first input terminal, the other pole of the input end of the power module is connected to the second input terminal, one pole of the output end of the power module is connected to one end of a coil of the relay, the other pole of the output end of the power module is connected to the other end of the coil of the relay, the first input terminal is also connected with one end of the first piezoresistor and one end of the second piezoresistor, the second input terminal is also connected with the other end of the first piezoresistor and one end of the third piezoresistor, the other end of the second piezoresistor and the other end of the third piezoresistor are also respectively connected with a normally open contact/common contact of the relay, and the common contact/normally open contact of the relay is grounded. Compared with the prior art, the invention can meet the requirements of lightning protection and insulation test at the same time without dismounting components through the relay.
Description
Technical Field
The invention relates to the field of circuit communication equipment testing, in particular to a lightning protection testing and insulation testing compatible circuit and electronic equipment.
Background
The TB/T3498 lightning protection test requires that 1KV is applied to the line of the power port of the device, the device can normally work when 2KV is applied between the line and the ground, the TB/T1447 insulation resistance test requires that 500V dc or ac is applied between all the ports of the device and the ground after all the ports are connected together, the resistance is greater than 25M Ω, the TB/T1448 insulation withstand voltage test requires that 1000V ac or dc is applied between all the ports of the device and the ground after all the ports are connected together, the device should not be subjected to insulation breakdown, surface flashover or a sudden drop in voltmeter reading of an access circuit, and so on, so the lightning protection test and the insulation test are in conflict with each other, i.e., the device should pass the lightning protection test, the lightning protection device adopted in the device will cause the insulation test not to pass, at present, most manufacturers adopt the device for the lightning protection circuit to remove the device to meet the insulation test, and when the lightning protection test is carried out, the circuit device should be installed again, thus increasing the complexity of the device test.
Disclosure of Invention
The invention aims to provide a lightning protection test and insulation test compatible circuit and electronic equipment, and a relay can meet the requirements of lightning protection and insulation test at the same time without dismounting components
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a lightning protection test and insulation test compatible circuit, includes first input terminal, second input terminal, first piezo-resistor, second piezo-resistor, third piezo-resistor, relay and power module, the one utmost point of power module's input is connected to first input terminal, and another utmost point is connected to the second input terminal, and one utmost point of output is connected to the one end of the coil of relay, and another utmost point is connected to the other end of the coil of relay, first input terminal still connects the one end of first piezo-resistor and the one end of second piezo-resistor, the other end of first piezo-resistor and the one end of third piezo-resistor are still connected to the second input terminal, the normally open contact/the common contact of relay are still connected respectively to the other end of second piezo-resistor and the other end of third piezo-resistor, the common contact/the normally open contact ground connection of relay.
The relay is a direct current relay, and the power supply module is an AC-DC module.
And a normally open contact of the relay is connected with the second voltage dependent resistor and the third voltage dependent resistor, and the normally open contact is grounded.
The first input terminal and the second input terminal are equipment power supply input ends.
And a current-limiting resistor is also arranged between the coil of the relay and the power supply module.
An electronic device comprises a device body, a first input terminal and a second input terminal, wherein the first input terminal and the second input terminal are arranged on the device body.
Compared with the prior art, the invention has the following beneficial effects:
1) The lightning protection and insulation test requirements can be met simultaneously without dismounting components through the relay.
2) The circuit is realized through a full hardware circuit, and is simple, few in peripheral circuits, low in cost and high in reliability.
3) Can be applied to the test of other similar equipment and similar standards by changing the device selection
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A lightning protection test and insulation test compatible circuit is applied to railway communication equipment, for example, interstation safety signal transmission equipment which needs to simultaneously meet the TB/T3498 lightning protection test standard and the TB/T1447 and TB/T1448 insulation test standards and cannot be allowed or is inconvenient to dismantle by a lightning protection circuit. As shown in fig. 1, the power supply device comprises a first input terminal V +, a second input terminal V-, a first piezoresistor R1, a second piezoresistor R2, a third piezoresistor R3, a relay K1 and a power module U1, wherein one pole of an input end of the power module U1 is connected to the first input terminal V +, the other pole is connected to the second input terminal V-, one pole of an output end is connected to one end of a coil of the relay K1, the other pole is connected to the other end of the coil of the relay K1, the first input terminal V + is also connected to one end of the first piezoresistor R1 and one end of the second piezoresistor R2, the second input terminal is also connected to the other end of the second piezoresistor R1 and one end of the second piezoresistor R3, the other end of the second piezoresistor R2 and the other end of the second piezoresistor R3 are also respectively connected to a normally open contact/common contact of the relay, the common contact/normally open contact of the relay K1 is grounded, and the first input terminal and the second input terminal are power supply input end of the device.
The lightning protection and insulation test requirements can be met simultaneously without dismounting components through the relay K1.
In some embodiments, the relay K1 is a DC relay, the power module U1 is an AC-DC module, and the power conversion module is an input power to DC power module U1, for example, the input power is 220V AC, and the relay K1 selects a 24V DC relay, and then the power conversion module selects a 220VAC to 24VDC module.
In some embodiments, the normally open contact of the relay K1 is connected to the second voltage dependent resistor R2 and the second voltage dependent resistor R3, and the normally open contact is grounded, so that the circuit reliability is better.
In some embodiments, a current-limiting resistor is further arranged between the coil of the relay K1 and the power module U1, so that safety is improved.
The resistance values of the three piezoresistors can be selected according to the rated voltage value of the input power supply, for example, the piezoresistor with 380V is selected from a 220V alternating current power supply, and the relay K1 can be selected from a direct current relay with large current capacity, for example, a 24V direct current relay or a 5V direct current relay.
The insulation test comprises an insulation resistance test and an insulation voltage withstand test, wherein the insulation resistance and the insulation voltage withstand test are performed by applying voltage between a power supply port of the equipment and the ground in a short-circuit mode under the condition that the equipment is not powered on, the K1 relay K1 coil is not powered on, the switch of K1 is in a disconnected state, the power supply input V +, V-of the equipment and the ground PE are in a disconnected state, and therefore the test requirements can be met when the insulation resistance and the insulation voltage withstand test are performed.
The lightning protection test is carried out under the condition that the equipment is powered on, after the equipment supplies power, the output power supply of the module U1 is electrified for the K1 relay K1 coil, the switch of the K1 is in a closed state, when V + is tested on the ground, the lightning protection test signal can be discharged through the R2, when V-is tested on the ground, the lightning protection test signal can be discharged through the R3, when V + is tested on the V-is tested, the lightning protection test signal can be discharged through the R1, and therefore the requirement of the lightning protection test is met.
Claims (10)
1. The utility model provides a lightning protection test and insulation test compatible circuit, its characterized in that includes first input terminal, second input terminal, first piezo-resistor, second piezo-resistor, third piezo-resistor, relay and power module, power module's the input one utmost point is connected to first input terminal, and another utmost point is connected to second input terminal, and one utmost point of output is connected to the one end of the coil of relay, and another utmost point is connected to the other end of the coil of relay, first input terminal still connects the one end of first piezo-resistor and the one end of second piezo-resistor, the other end of first piezo-resistor and the one end of third piezo-resistor are still connected to the second input terminal, the normally open contact/the public contact of relay are still connected respectively to the other end of second piezo-resistor and the other end of third piezo-resistor, the public contact/the normally open contact ground connection of relay.
2. The lightning protection test and insulation test compatible circuit of claim 1, wherein the relay is a DC relay and the power module is an AC-DC module.
3. The lightning protection test and insulation test compatible circuit according to claim 1, wherein the normally open contact of the relay is connected to the second varistor and the third varistor, and the normally open contact is grounded.
4. The lightning protection test and insulation test compatible circuit of claim 1, wherein the first input terminal and the second input terminal are device power inputs.
5. The lightning protection test and insulation test compatible circuit according to claim 1, wherein a current limiting resistor is further disposed between the coil of the relay and the power module.
6. The utility model provides an electronic equipment, includes the equipment body and locates first input terminal, the second input terminal on the equipment body, its characterized in that still includes first piezo-resistor, second piezo-resistor, third piezo-resistor, relay and power module, the one utmost point of power module's input is connected to first input terminal, and another utmost point is connected to the second input terminal, and one utmost point of output is connected to the one end of the coil of relay, and another utmost point is connected to the other end of the coil of relay, first input terminal still connects the one end of first piezo-resistor and the one end of second piezo-resistor, the other end of first piezo-resistor and the one end of third piezo-resistor are still connected to the second input terminal, the normally open contact/the common contact of relay are still connected respectively to the other end of second piezo-resistor and the other end of third piezo-resistor, the common contact/the normally open contact ground connection of relay.
7. An electronic device according to claim 6, wherein the relay is a direct current relay and the power module is an AC-DC module.
8. The electronic device of claim 6, wherein the normally open contact of the relay is connected to the second voltage dependent resistor and the third voltage dependent resistor, and the normally open contact is connected to ground.
9. An electronic device according to claim 6, wherein the first input terminal and the second input terminal are device power supply input terminals.
10. The electronic device of claim 6, wherein a current limiting resistor is further disposed between the coil of the relay and the power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425771.5A CN115219807A (en) | 2021-04-20 | 2021-04-20 | Lightning protection test and insulation test compatible circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425771.5A CN115219807A (en) | 2021-04-20 | 2021-04-20 | Lightning protection test and insulation test compatible circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115219807A true CN115219807A (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110425771.5A Pending CN115219807A (en) | 2021-04-20 | 2021-04-20 | Lightning protection test and insulation test compatible circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN115219807A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230064503A1 (en) * | 2021-08-25 | 2023-03-02 | Hamilton Sundstrand Corporation | Circuit testing and diagnosis |
| CN116106731A (en) * | 2022-09-08 | 2023-05-12 | 深圳深爱半导体股份有限公司 | Relay testing device |
-
2021
- 2021-04-20 CN CN202110425771.5A patent/CN115219807A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230064503A1 (en) * | 2021-08-25 | 2023-03-02 | Hamilton Sundstrand Corporation | Circuit testing and diagnosis |
| US11879931B2 (en) * | 2021-08-25 | 2024-01-23 | Hamilton Sundstrand Corporation | Circuit testing and diagnosis |
| CN116106731A (en) * | 2022-09-08 | 2023-05-12 | 深圳深爱半导体股份有限公司 | Relay testing device |
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