CN112415236A - A kind of cable transfer pre-test test method - Google Patents
A kind of cable transfer pre-test test method Download PDFInfo
- Publication number
- CN112415236A CN112415236A CN202011288497.3A CN202011288497A CN112415236A CN 112415236 A CN112415236 A CN 112415236A CN 202011288497 A CN202011288497 A CN 202011288497A CN 112415236 A CN112415236 A CN 112415236A
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- China
- Prior art keywords
- test
- cable
- transfer device
- push
- pull
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Classifications
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
一种电缆转接预试试验方法，包括：将敞开式手车开关拉出至柜体外，将电缆预试转接装置的每个触头外侧接线桩用短接线相互短接，并与开关柜接地桩连接，将转接装置推至试验位置；将电缆预试转接装置推至工作位置，放尽电缆剩余电荷，再将电缆预试转接装置拉至试验位置；将被试相电缆对应的电缆预试转接装置接线桩接试验设备，其他相接线桩接地，再将电缆预试转接装置推至工作位置，对试验相加预试电压，试验完再将电缆预试转接装置拉至试验位置；解开试验线，将电缆预试转接装置推至工作位置，将电缆剩余电荷放尽，再将电缆预试转接装置拉至试验位置。本发明保证了作业人员与带电体的安全。A cable transfer pre-test test method, comprising: pulling an open handcart switch out of the cabinet, short-circuiting the outer wiring posts of each contact of the cable pre-test transfer device with short wires, and connecting it with the switch cabinet. Connect the grounding stake, push the transfer device to the test position; push the cable pre-test transfer device to the working position, discharge the remaining charge of the cable, and then pull the cable pre-test transfer device to the test position; The cable pre-test transfer device is connected to the test equipment, and the other phases are grounded. Then push the cable pre-test transfer device to the working position, add the pre-test voltage to the test phase, and then put the cable pre-test transfer device after the test. Pull to the test position; untie the test wire, push the cable pre-test transfer device to the working position, discharge the remaining charge of the cable, and then pull the cable pre-test transfer device to the test position. The present invention ensures the safety of the operator and the charged body.
Description
Technical Field
The invention belongs to the field of power supply application.
Background
Open-type 35kV handcart-type circuit breaker, its structure is: the upper static contact is connected with the bus, the lower static contact is connected with electric equipment such as a cable, and the middle part adopts a movable handcart breaker. When the power failure operation is carried out, the circuit breaker is disconnected, the handcart is pulled to a test position, and the movable contact and the static contact are separated. The distance between the upper contact and the lower contact is 0.7 m, the upper static contact is connected with the bus, power failure is difficult to occur, when cable maintenance, pre-test and other operations are required to be carried out at the lower contact, personnel cannot guarantee that the safety distance with a live part is enough constantly in the operation process, and the danger of electric shock caused by operation behaviors exists. Therefore, a special switching device is designed, and various pre-test projects of the connected cable are completed on the basis of ensuring the safe distance between the special switching device and a charged body in construction operation through continuous use of different wiring forms.
Disclosure of Invention
The invention solves the problem that after a 35kV open-type handcart switch is pulled out, an upper contact is electrified, and the safe distance between the upper contact and the electrified part can not be ensured at any time when the upper contact is overhauled and connected with a cable test operation at a lower contact.
A cable switching pre-test method comprises the following steps:
(1) pulling out the open handcart switch to the outside of the cabinet body, and using short wires (not less than 25 mm) for wiring piles at the outer side of each contact of the cable pre-test switching device2) The short circuits are mutually connected and are connected with the grounding pile of the switch cabinet, and the switching device is pushed to a test position;
(2) respectively testing the three phases of the lower static contact of the switch, pushing the cable pre-test switching device to a working position after the voltage is ensured to be absent, discharging the residual charge of the cable, and pulling the cable pre-test switching device to a test position;
(3) when the cable is pretested, connecting a wiring pile of the cable pretest switching device corresponding to the tested phase cable to test equipment, grounding other phase wiring piles, pushing the cable pretest switching device to a working position, adding pretest voltage to the test, and pulling the cable pretest switching device to the test position after the test is finished;
(4) and (4) unfastening the test wire, connecting the grounding wire, pushing the cable pre-test switching device to a working position, discharging the residual charge of the cable, and pulling the cable pre-test switching device to a test position.
(5) Repeating the step 3 and the step 4 until the cable test of each phase is finished;
(6) and pulling the cable pre-test switching device out of the cabinet body, pushing the open-type handcart switch to a test position, and recovering the state before the test.
The cable pre-test switching device comprises a base, a contact and an insulating porcelain bottle, wherein the base is a rectangular box body, the insulating porcelain bottle is arranged between the base and the contact, an insulator is arranged above the contact, and a 5mm insulating partition plate is fixedly arranged above the insulator. And a wiring pile is reserved on the outer side of each contact and can be used for leading a grounding wire and feeding test voltage.
According to the invention, on the premise of ensuring that the safety distance between an operator and a charged body is kept, the cable safety qualification test is realized through wiring the cable pre-test switching device under different test items, and the benefit is obvious.
Detailed Description
A cable switching pre-test method comprises the following steps:
(1) pulling out the open handcart switch to the outside of the cabinet body, and using short wires (not less than 25 mm) for wiring piles at the outer side of each contact of the cable pre-test switching device2) The short circuits are mutually connected and are connected with the grounding pile of the switch cabinet, and the switching device is pushed to a test position;
(2) respectively testing the three phases of the lower static contact of the switch, pushing the cable pre-test switching device to a working position after the voltage is ensured to be absent, discharging the residual charge of the cable, and pulling the cable pre-test switching device to a test position;
(3) when the cable is pretested, connecting a wiring pile of the cable pretest switching device corresponding to the tested phase cable to test equipment, grounding other phase wiring piles, pushing the cable pretest switching device to a working position, adding pretest voltage to the test, and pulling the cable pretest switching device to the test position after the test is finished;
(4) and (4) unfastening the test wire, connecting the grounding wire, pushing the cable pre-test switching device to a working position, discharging the residual charge of the cable, and pulling the cable pre-test switching device to a test position.
(5) Repeating the step 3 and the step 4 until the cable test of each phase is finished;
(6) and pulling the cable pre-test switching device out of the cabinet body, pushing the open-type handcart switch to a test position, and recovering the state before the test.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011288497.3A CN112415236A (en) | 2020-11-17 | 2020-11-17 | A kind of cable transfer pre-test test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011288497.3A CN112415236A (en) | 2020-11-17 | 2020-11-17 | A kind of cable transfer pre-test test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112415236A true CN112415236A (en) | 2021-02-26 |
Family
ID=74831665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011288497.3A Pending CN112415236A (en) | 2020-11-17 | 2020-11-17 | A kind of cable transfer pre-test test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112415236A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203301007U (en) * | 2013-05-17 | 2013-11-20 | 山西太钢不锈钢股份有限公司 | Compact high-voltage switch cabinet safety protection device |
| CN104348107A (en) * | 2014-11-28 | 2015-02-11 | 湖南长高高压开关集团股份公司 | All condition intelligent armored moving-type alternating current metal closed switch equipment |
| CN204190234U (en) * | 2014-10-30 | 2015-03-04 | 国家电网公司 | High-tension switch cabinet ground connection and Test Integrated dolly |
| CN205141497U (en) * | 2015-11-17 | 2016-04-06 | 江苏省水利勘测设计研究院有限公司 | Commutation isolated wheelbarrow |
| CN105974229A (en) * | 2016-05-06 | 2016-09-28 | 国网山东省电力公司青州市供电公司 | Disconnection-free testing method for high voltage electric equipment in transformer substation |
| CN107732732A (en) * | 2017-10-19 | 2018-02-23 | 山西太钢不锈钢股份有限公司 | A kind of portable grounding test apparatus and test for ground method |
-
2020
- 2020-11-17 CN CN202011288497.3A patent/CN112415236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203301007U (en) * | 2013-05-17 | 2013-11-20 | 山西太钢不锈钢股份有限公司 | Compact high-voltage switch cabinet safety protection device |
| CN204190234U (en) * | 2014-10-30 | 2015-03-04 | 国家电网公司 | High-tension switch cabinet ground connection and Test Integrated dolly |
| CN104348107A (en) * | 2014-11-28 | 2015-02-11 | 湖南长高高压开关集团股份公司 | All condition intelligent armored moving-type alternating current metal closed switch equipment |
| CN205141497U (en) * | 2015-11-17 | 2016-04-06 | 江苏省水利勘测设计研究院有限公司 | Commutation isolated wheelbarrow |
| CN105974229A (en) * | 2016-05-06 | 2016-09-28 | 国网山东省电力公司青州市供电公司 | Disconnection-free testing method for high voltage electric equipment in transformer substation |
| CN107732732A (en) * | 2017-10-19 | 2018-02-23 | 山西太钢不锈钢股份有限公司 | A kind of portable grounding test apparatus and test for ground method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |
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| RJ01 | Rejection of invention patent application after publication |