Electronic voltage sensor lightning impulse and withstand voltage test circuit

Abstract

The utility model discloses an electronic voltage sensor lightning impulse and withstand voltage test circuit, the tail ends of a voltage sensor A, a voltage sensor B and a voltage sensor C are connected and then electrically connected with an adjusting circuit for output, the primary high-voltage end of the circuit is pressurized, the secondary signal end is suspended, and the secondary grounding end is grounded. The adjusting circuit comprises a secondary resistance adjusting circuit or a secondary capacitance adjusting circuit or a secondary capacitance and isolation coil parallel adjusting circuit. According to the electronic voltage sensor lightning impulse and withstand voltage test circuit, the problems of virtual circuit connection and unqualified electrical components can be effectively solved, and the qualified rate of products after the products are installed on a switch cabinet can be improved. Compared with a conventional test circuit, the electronic voltage sensor product of the test circuit is more reliable, and the qualified rate is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system measurement protection device technical field, concretely relates to the electronic voltage sensor lightning impact and withstand voltage test circuit for the primary and secondary fusion pole circuit breaker of state grid. BACKGROUND

[0002] With the development of smart grid industry, the smart grid construction puts forward new requirements to switch miniaturization, high reliability, automation and intelligence. At present, the voltage sensor running in the primary and secondary fusion system of distribution network is an electronic transformer, which is usually used with the conventional ZW28 pole circuit breaker. At present, the transformer manufacturer only produces the transformer according to the standard without specific test circuit requirements. The electronic voltage sensor test circuit is provided, which can meet the technical requirements of switch cabinet manufacturers. SUMMARY

[0003] The utility model provides a kind of electronic voltage sensor lightning impact and withstand voltage test circuit, which can meet the technical requirements of various new miniaturization pole circuit breakers.

[0004] The technical scheme adopted by the utility model is an electronic voltage sensor lightning impact and withstand voltage test circuit, which is connected to the end of voltage sensor A, voltage sensor B and voltage sensor C, and then connected to the output of the adjustment circuit. The primary high-voltage end of the circuit is pressurized, the secondary signal end is suspended, and the secondary grounding end is grounded. The adjustment circuit includes a secondary resistance adjustment circuit, a secondary capacitor adjustment circuit, or a secondary capacitor and isolation coil parallel adjustment circuit.

[0005] Preferably, when the secondary resistance adjustment circuit is adjusted, the secondary output signal line da is suspended, and the dn and ground line are grounded together.

[0006] Preferably, when the secondary capacitor adjustment circuit is adjusted, the secondary output signal line da is suspended, and the dn is grounded.

[0007] Preferably, when the secondary capacitor and isolation coil parallel adjustment circuit is adjusted, the secondary output signal lines a b c da are suspended, and the an bn cn dn are grounded.

[0008] Advantages: This electronic voltage sensor lightning impact and withstand voltage test circuit can effectively eliminate the problems of line virtual connection and unqualified electrical components, and can improve the qualification rate of products installed in the switch cabinet. Compared with the conventional test circuit, the electronic voltage sensor product of the utility model test circuit is more reliable and has a higher qualification rate. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a secondary resistance adjustment circuit of the utility model.

[0010] Figure 2 The secondary capacitor adjustment circuit is used for the utility model.

[0011] Figure 3 The secondary capacitor and isolation coil parallel adjustment circuit is used for the utility model. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0013] A kind of electronic voltage sensor lightning impact and withstand voltage test circuit. When doing lightning impact test and withstand voltage test, once high voltage end is pressurized, secondary signal end is grounded, and secondary ground end is grounded. The test circuit of the utility model is that once high voltage end is pressurized, secondary signal end is suspended, and secondary ground end is grounded. A kind of electronic voltage sensor lightning impact and withstand voltage test circuit, voltage sensor A, voltage sensor B, voltage sensor C end is connected after output after being connected to adjusting circuit, once high voltage end of the circuit is pressurized, secondary signal end is suspended, and secondary ground end is grounded, and the adjusting circuit includes secondary resistance adjustment circuit or secondary capacitor adjustment circuit or secondary capacitor and isolation coil parallel adjustment circuit.

[0014] As shown in Figure 1 Three independent A, B, C phase individuals (i.e. voltage sensor A, voltage sensor B, voltage sensor C) end is connected together, and output voltage signal da dn is output by secondary resistance adjustment. When doing lightning impact and withstand voltage test, A, B, C are simultaneously applied high voltage. Secondary output signal line da is suspended, and dn and ground line are grounded together. The original wiring method is that da dn and ground line are grounded together.

[0015] As shown in Figure 2 Three independent A, B, C phase individuals (i.e. voltage sensor A, voltage sensor B, voltage sensor C) end is connected together, and output voltage signal da dn is output by secondary capacitor adjustment. When doing lightning impact and withstand voltage test, A, B, C are simultaneously applied high voltage. Secondary output signal line da is suspended, and dn is grounded. The original wiring method is that da dn and ground line are grounded together.

[0016] As shown in Figure 3As shown, three independent A, B, C phase individuals (namely voltage sensor A, voltage sensor B, voltage sensor C) are connected together at the end, and the output phase voltage signal a an, b bn, c cn, and the output zero sequence voltage signal da dn are adjusted through the secondary capacitor and the isolation coil. When doing lightning impulse and withstand voltage test, A, B, and C are simultaneously applied with high voltage. The secondary output signal lines a b c da are floating, and an bn cn dn are grounded. The original wiring method is a an b bn c cn da dn and the ground wire is grounded together.

[0017] The electronic voltage sensor test circuit of the utility model is suitable for ZW28 pole-mounted circuit breaker, compared with the original test method, the electronic voltage sensor product of the utility model test method is more reliable, the qualified rate is high, and no quality problem is ensured after the product is installed to the switch cabinet.

[0018] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The skilled person in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electronic voltage sensor lightning impulse and withstand voltage test circuit, characterized by: The terminals of voltage sensor A, voltage sensor B, and voltage sensor C are connected and electrically connected to the regulation circuit for output. The primary high-voltage terminal of the circuit is pressurized, the secondary signal terminal is suspended, and the secondary ground terminal is grounded. The regulation circuit includes a secondary resistance regulation circuit, a secondary capacitance regulation circuit, or a secondary capacitance and isolation coil parallel regulation circuit.

2. The electronic voltage sensor lightning impulse and withstand voltage test circuit according to claim 1, characterized in that: When the secondary resistance adjustment circuit is adjusted, the secondary output signal line da is suspended, and dn and the ground line are grounded together.

3. The electronic voltage sensor lightning impulse and withstand voltage test circuit according to claim 1, characterized in that: When the secondary capacitance adjustment circuit is adjusted, the secondary output signal line da is suspended and dn is grounded.

4. The electronic voltage sensor lightning impulse and withstand voltage test circuit according to claim 1, characterized in that: When the secondary capacitor and the isolation coil are adjusted in parallel, the secondary output signal lines abc da are suspended and anbn cn dn are grounded.

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