CN202049199U - Circuit for routine experiments without removing high-voltage leads - Google Patents
Circuit for routine experiments without removing high-voltage leads Download PDFInfo
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- CN202049199U CN202049199U CN2010206396870U CN201020639687U CN202049199U CN 202049199 U CN202049199 U CN 202049199U CN 2010206396870 U CN2010206396870 U CN 2010206396870U CN 201020639687 U CN201020639687 U CN 201020639687U CN 202049199 U CN202049199 U CN 202049199U
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Abstract
The utility model discloses a circuit for routine experiments without removing high-voltage leads, comprising a tested object CVT (Constant-Voltage Transformer). The tg Delta of an upper joint C1 of the CVT and a capacitance testing terminal are reversely connected; the upper-end lead A of the C1 is grounded; the lower-end lead B of the C1 is connected with a high-voltage core wire; the lower-end lead C of a middle joint C2 is connected with a high-voltage shielding wire; the Delta of the CVT is grounded; and an XL is split. The lower joint C1 of the CVT is positively connected. The middle joint of the CVT is positively connected; and a tested power supply bears the current of two capacitors that are arranged in parallel. By adopting the circuit, without removing the high-voltage leads, the measurement results of the middle joint and the lower joint of phases A, B and C are basically the same with the testing results obtained after the leads are removed; furthermore, the dielectric loss of the upper joint is grown relatively; within the standard scope, the capacitance is slightly changed and is also qualified; and the test is convenient and safe, manpower and material resources are saved, the working efficiency is greatly improved, and the shutdown time is shortened.
Description
Technical field
The utility model belongs to electrical equipment and carries out the day to day tests technical field, is specifically related to a kind of circuit that high-voltage connection carries out day to day tests of not tearing open.
Background technology
High voltage electric equipment carries out all will disconnecting the high-voltage connection of tested device before and after the day to day tests.The 500kV electrical equipment is because its volume is big, device height, and high-voltage connection height, thick, long, heavy needs more time and manpower, and will have certain plant equipment to cooperate just to disconnect high-voltage connection, also is individual hidden danger to the person and device security when disconnecting lead-in wire.And 500KV electrical equipment electrical equipment power off time one is long, and the stabilization of power grids is also constituted the bigger danger side of body.So short at power off time, under personnel's condition of limited, removing high-voltage connection, to carry out day to day tests be impossible at all.For increasing work efficiency, use manpower and material resources sparingly, reduce power off time, the current research electrical equipment that needs is not being torn the method for carrying out day to day tests under the high-voltage connection situation open.
The utility model content
The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provide a kind of convenient and safe, use manpower and material resources sparingly, the efficient height, reduce power off time do not tear the circuit that high-voltage connection carries out day to day tests open.
A kind ofly do not tear the circuit that high-voltage connection carries out day to day tests open, comprise that by test object CVT described CVT goes up tg δ and the electric capacity test of joint C1 and wants reversal connection, C1 upper end lead-in wire A ground connection, lower end B connects the high pressure heart yearn, and middle joint C2 lower end C connects the high-tension shielding line, the δ ground connection of CVT, XL takes apart.
Described CVT joint C1 employing down just connects.
Joint adopts and just connects among the described CVT, and experiment power supply will be born two joints capacitance current in parallel.
Utilize the utility model, adopt do not tear high-voltage connection open after, A, B, C mutually in, to save measurement result down the same substantially with the lead-in wire test result of dismantling, and on save dielectric loss and compare certain growth is arranged, in critical field, but the electric capacity tip changes, also in acceptability limit.Therefore when last joint is measured the dielectric loss test, propose not add the method for shielding, decrease and electric capacity by calculating the medium of trying to achieve joint.The employing of not tearing the high-voltage connection method open satisfied fully " rules " and equipment itself the technical requirement that should reach, convenient and safe, use manpower and material resources sparingly, improved work efficiency greatly, shortened power off time.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is a circuit diagram of the present utility model,
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
As Fig. 1, shown in Figure 2: the CVT that described CVT goes up this mode of connection of joint test goes up tg δ and the electric capacity test of joint C1 will measure as shown in Figure 1 C1 upper end lead-in wire A ground connection with opposition method, lower end B connects the high pressure heart yearn, middle joint C2 lower end C connects the high-tension shielding line, the δ ground connection of CVT, and XL takes apart; Joint can adopt positive connection or opposition method under CVT saved down and tests, and generally used positive connection; Save and can directly adopt positive connection as shown in Figure 2 in the joint test among the CVT, experiment power supply will be born two joints capacitance current in parallel.
Utilize the utility model, adopt do not tear high-voltage connection open after, A, B, C mutually in, to save measurement result down the same substantially with the lead-in wire test result of dismantling, and on save dielectric loss and compare certain growth is arranged, in critical field, but the electric capacity tip changes, also in acceptability limit.Therefore when last joint is measured the dielectric loss test, propose not add the method for shielding, decrease and electric capacity by calculating the medium of trying to achieve joint.The employing of not tearing the high-voltage connection method open satisfied fully " rules " and equipment itself the technical requirement that should reach, convenient and safe, use manpower and material resources sparingly, improved work efficiency greatly, shortened power off time.
Claims (3)
1. do not tear the circuit that high-voltage connection carries out day to day tests open for one kind, comprise by test object CVT, it is characterized in that: described CVT goes up the tg δ and the electric capacity test of joint (C1) and wants reversal connection, (C1) upper end lead-in wire (A) ground connection, (B) connects the high pressure heart yearn in the lower end, middle joint (C2) lower end (C) connects the high-tension shielding line, the δ ground connection of CVT, and XL takes apart.
2. as claimed in claim 1ly do not tear the circuit that high-voltage connection carries out day to day tests open, it is characterized in that: CVT joint (C1) down adopts and just connects.
3. as claimed in claim 1ly do not tear the circuit that high-voltage connection carries out day to day tests open, it is characterized in that: joint adopts and just connects among the CVT, and experiment power supply will be born two joints capacitance current in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206396870U CN202049199U (en) | 2010-11-26 | 2010-11-26 | Circuit for routine experiments without removing high-voltage leads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206396870U CN202049199U (en) | 2010-11-26 | 2010-11-26 | Circuit for routine experiments without removing high-voltage leads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049199U true CN202049199U (en) | 2011-11-23 |
Family
ID=44989504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206396870U Expired - Fee Related CN202049199U (en) | 2010-11-26 | 2010-11-26 | Circuit for routine experiments without removing high-voltage leads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049199U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064651A (en) * | 2017-06-07 | 2017-08-18 | 国家电网公司 | It is a kind of adding for without disconnecting power lead test more piece high-voltage capacitor to shield dielectric loss device |
| CN107807282A (en) * | 2017-10-31 | 2018-03-16 | 国网福建省电力有限公司 | The method of tested media loss factor and capacitance under transformer non-dismantle high voltages fuse |
| CN108169575A (en) * | 2018-01-16 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | The test device and method of a kind of CVT capacitances dielectric loss and capacitance |
| CN111239671A (en) * | 2020-03-12 | 2020-06-05 | 国电大渡河检修安装有限公司 | Method for measuring capacitance and dielectric loss value of upper-node coupling capacitor of CVT (constant-Voltage Transformer) |
-
2010
- 2010-11-26 CN CN2010206396870U patent/CN202049199U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064651A (en) * | 2017-06-07 | 2017-08-18 | 国家电网公司 | It is a kind of adding for without disconnecting power lead test more piece high-voltage capacitor to shield dielectric loss device |
| CN107807282A (en) * | 2017-10-31 | 2018-03-16 | 国网福建省电力有限公司 | The method of tested media loss factor and capacitance under transformer non-dismantle high voltages fuse |
| CN108169575A (en) * | 2018-01-16 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | The test device and method of a kind of CVT capacitances dielectric loss and capacitance |
| CN108169575B (en) * | 2018-01-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Method for testing dielectric loss and capacitance of CVT capacitor |
| CN111239671A (en) * | 2020-03-12 | 2020-06-05 | 国电大渡河检修安装有限公司 | Method for measuring capacitance and dielectric loss value of upper-node coupling capacitor of CVT (constant-Voltage Transformer) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20121126 |