CN108508327A - A kind of test apparatus and its method of inspection of the cross interconnected service check of cable - Google Patents
A kind of test apparatus and its method of inspection of the cross interconnected service check of cable Download PDFInfo
- Publication number
- CN108508327A CN108508327A CN201810574164.3A CN201810574164A CN108508327A CN 108508327 A CN108508327 A CN 108508327A CN 201810574164 A CN201810574164 A CN 201810574164A CN 108508327 A CN108508327 A CN 108508327A
- Authority
- CN
- China
- Prior art keywords
- cable
- test
- current
- cross interconnected
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of test apparatus of the cross interconnected service check of cable, is connect with A, B, C three phase mains；Including three groups of test units；The input terminal of three groups of test units is connect with A, B, C three phase mains respectively, and output end is connect with one end of cable core A, B, C three-phase respectively；Every group of test unit includes sequentially connected automatic coupling voltage regulator, current lifting device and ammeter, and the automatic coupling voltage regulator of every group of test unit is connect with A, B, C three phase mains respectively, and the ammeter of every group of test unit is connected with cable core A, B, C tri- respectively；It is grounded after the other end connection of cable core A, B, C three-phase.The present invention also provides a kind of methods of inspection of the cross interconnected performance tests instrument of cable.The test apparatus and its method of inspection of the present invention can carry out effective, quick and reliable inspection to the performance of cable metal sheath crossbonding earthed system, to ensure reliability and the safety of power supply.
Description
Technical field
The present invention relates to power equipment inspection technology fields, are examined more specifically to a kind of cross interconnected performance of cable
The test apparatus and its method of inspection tested.
Background technology
With the development and transformation of the rapid development of China's power industry, especially urban distribution network, high pressure and extra-high voltage
Power cable is used widely.At this stage, the extra-high-tension cable of 110kV or more, cable metal sheath are mutual frequently with intersecting
Join earthing mode.
Cable metal sheath crossbonding is that earthing mode is that cable is divided into several big sections, is divided into length in principle per big section
Three equal segments are spent, are connected with insulating joint between every segment；At insulating joint coaxial cable is used between protective metal shell three-phase
(the cross interconnected connecting line of three-phase) carries out transposition connection through cross interconnected indirect earthed case (and at transposition case), at insulating joint
The case that replaces is interior to install one group of sheath protector, and the both ends sheath per big section is interconnected and is grounded respectively.It can using this connection type
To reduce circulation on protective metal shell.Cross interconnected connection is equivalent to delta connection, and grounding circulation is largely cancelled out each other, and generates
Circulation it is smaller.
The defects of this cable metal sheath crossbonding earthed system is extremely important, wrong line or poor contact may lead
Cause cable breakdown.Therefore, it is necessary to effectively be examined to the performance of cable metal sheath crossbonding earthed system.So
And since in power equipment at this stage, reviewer lacks when examining the performance of cable metal sheath crossbonding earthed system
Few corresponding test apparatus and test method, cause the performance of cable metal sheath crossbonding earthed system in cable application
It can not implement to examine, often influence reliability and the safety of power supply.
Therefore, it now needs to provide a kind of test apparatus and its method of inspection of the cross interconnected service check of cable, for ensureing
Electrical network economy stable operation is particularly significant, and has important value and meaning to the development of intelligent grid.
Invention content
It is an object of the invention to overcome shortcoming and deficiency in the prior art, a kind of cross interconnected performance inspection of cable is provided
The test apparatus and its method of inspection tested, the test apparatus and the method for inspection can be to cable metal sheath crossbonding earthed systems
Performance carry out effective, quick and reliable inspection, to ensure reliability and the safety of power supply.
In order to achieve the above object, the technical scheme is that：A kind of cross interconnected performance of cable
The test apparatus of inspection, for cable metal sheath crossbonding earthed system carry out service check, and with A, B, C three-phase electricity
Source connects；It is characterized in that：Including three groups of test units；The input terminal of three groups of test units connects with A, B, C three phase mains respectively
It connects, output end is connect with one end of cable core A, B, C three-phase respectively；Every group of test unit includes sequentially connected self-coupling
The automatic coupling voltage regulator of device, current lifting device and ammeter, every group of test unit is connect with A, B, C three phase mains respectively, every group of test sheet
The ammeter of member is connected with cable core A, B, C tri- respectively；The other end connection of cable core A, B, C three-phase is followed by
Ground.
In the above scheme, test apparatus of the invention is simple in structure, by three groups of test units respectively with cable core
A, B, C tri- is connected, and it is an integrated equipment to be equivalent to the tester, is not only convenient for carrying and construction site uses, Er Qiebian
Operation and wiring when examining.Have to the performance of cable metal sheath crossbonding earthed system by the test apparatus
Effect quickly and is reliably examined, to ensure reliability and the safety of power supply.In addition, cable core A, B, C three-phase is another
It is grounded after the connection of end, test apparatus power of the present invention can be greatly reduced so that the tester is easy to remove and carries, to improve
The convenience and practicability for using and examining.
In three groups of test units, the first winding of each automatic coupling voltage regulator is just held to be connected with A, B, C three phase mains respectively
It connects, first winding tail end links together ground connection.
In three groups of test units, the secondary winding of each automatic coupling voltage regulator just hold respectively with current lifting device first winding at the beginning of
End connection；Each automatic coupling voltage regulator secondary winding tail end links together and is grounded with current lifting device first winding tail end.
The power of each automatic coupling voltage regulator is 2KVA~5KVA.
In three groups of test units, the secondary winding of each current lifting device just hold respectively by ammeter and cable core A,
B, C tri- is connected, the secondary coil tail end ground connection of current lifting device.
The power of each current lifting device is 2KVA~5KVA.
The present invention considers other losses, the optional 2KVA~3KVA of power of automatic coupling voltage regulator and current lifting device, it is contemplated that
The power needed when the cross-section of cable is smaller is larger, and maximum is it is contemplated that 5KVA.And the secondary winding coil of current lifting device can change, root
According to core section and length, the number of turns of current lifting device secondary winding is adjusted, the output voltage of winding is increased or decreased, to meet test
Needs.
A kind of method of inspection of the cross interconnected performance tests instrument of cable, it is characterised in that：Three groups of test sheets are set
Member carries out cable metal sheath crossbonding earthed system to change the test current of service check, and to cable metal sheath
Electric current and voltage in cross connection grounding system measure judgement, realize to cable metal sheath crossbonding earthed system
Performance test；
The input terminal of three groups of test units is connect with A, B, C three phase mains respectively, output end respectively with cable core
A, one end connection of B, C three-phase；Every group of test unit includes sequentially connected automatic coupling voltage regulator, current lifting device and ammeter, every group
The automatic coupling voltage regulator of test unit is connect with A, B, C three phase mains respectively, the ammeter of every group of test unit respectively with cable
Core A, B, C tri- is connected；It is grounded after the other end connection of cable core A, B, C three-phase.
In the above scheme, which can efficiently and quickly change test current by three groups of test units, to
The electric current and voltage in cable metal sheath crossbonding earthed system can quickly be measured and judge its performance, to improve detection
Efficiency and speed.
Three groups of test units of the setting carry out service check to change to cable metal sheath crossbonding earthed system
Test current refer to：Adjust the voltage value of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter, it is real
The core electric current for now changing simultaneously cable core A, B, C three-phase, with change to cable metal sheath crossbonding earthed system into
The test current of row service check.Which of the present invention is quickly direct, and can guarantee the core electricity of cable core A, B, C three-phase
It flows identical, the voltage value of automatic coupling voltage regulator is directly adjusted according to ammeter.
Three groups of test units of the setting carry out service check to change to cable metal sheath crossbonding earthed system
Test current, and in cable metal sheath crossbonding earthed system electric current and voltage measure judgement, realize pair
It refers to including the following steps that the performance of cable metal sheath crossbonding earthed system, which is tested,：
The connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system is in correct connection by the first step
Position, and the voltage value of each automatic coupling voltage regulator is adjusted according to the numerical value change of each ammeter simultaneously so that cable
The core of core A, B, C three-phase is simultaneously by balanced electric current I, using as test current；
Second step measures the metallic sheath electric current I at the cross interconnected case1With voltage-to-ground V1；After measurement, according to every
The numerical value change of a ammeter is come while adjusting the voltage value of each automatic coupling voltage regulator so that and test current is reduced to zero, and
Cut off A, B, C three phase mains；
Third walks, by the company of the connection sheet simulation mistake of cross interconnected case in cable metal sheath crossbonding earthed system
The mode of connecing connects, and adjusts the voltage value of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter so that
The core of cable core A, B, C three-phase is simultaneously by balanced electric current I, using as test current；
4th step measures the metallic sheath electric current I at the cross interconnected case2With voltage-to-ground V2；After measurement, according to every
The numerical value change of a ammeter is come while adjusting the voltage value of each automatic coupling voltage regulator so that and test current is reduced to zero, and
Cut off A, B, C three phase mains；
5th step restores the connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system to correctly connecting
Position is connect, come further according to the numerical value change of each ammeter while adjusting the voltage value of each automatic coupling voltage regulator so that cable
The core of core A, B, C three-phase is simultaneously by balanced electric current I, using as test current, and measures at other cross interconnected casees
Metallic sheath electric current I3With voltage-to-ground V3；
6th step thinks that the performance of cable metal sheath crossbonding earthed system is good if meeting following Rule of judgment：
(1) metallic sheath electric current I1With metallic sheath electric current I3It is identical, and no more than the 3% of test current I；
(2) metallic sheath electric current I3It is less than I less than metallic sheath electric current2；
(3) if done safeguard procedures, voltage kV1And kV3It is identical, it is below 200V；Otherwise, voltage kV1And kV3It is identical,
It is below 50V；Wherein,I4For core rated current.
The test current I is 100A.
Above-mentioned second Rule of judgment is metallic sheath electric current I3It is less than I significantly less than metallic sheath electric current2。
Compared with prior art, the invention has the advantages that and advantageous effect：A kind of cross interconnected property of cable of the present invention
The test apparatus and its method of inspection that can be examined can carry out the performance of cable metal sheath crossbonding earthed system effectively, soon
Speed and reliable inspection, to ensure reliability and the safety of power supply.
Description of the drawings
Fig. 1 is the schematic diagram of the test apparatus and power supply and cable connection of the cross interconnected service check of cable of the present invention；
Fig. 2 is the schematic diagram of the technology of the present invention test apparatus power；
Wherein, 1 it is automatic coupling voltage regulator, 2 be current lifting device, 3 be A phases cable, 4 be B phases cable, 5 be C phases cable, 6 is electric current
Table.
Specific implementation mode
The present invention is described in further detail with specific implementation mode below in conjunction with the accompanying drawings.
Embodiment
As shown in Figure 1, the test apparatus of the cross interconnected service check of cable of the present invention, is for cable metal sheath
Cross connection grounding system carries out service check, and is connect with A, B, C three phase mains, which includes three groups of test sheets
The input terminal of member, three groups of test units is connect with A, B, C three phase mains respectively, output end respectively with A phases cable 3, B phases cable 4
It is connected with one end of C phases cable 5；Every group of test unit includes sequentially connected automatic coupling voltage regulator 1, current lifting device 2 and ammeter 6,
The automatic coupling voltage regulator 1 of every group of test unit is connect with A, B, C three phase mains respectively, the ammeter 6 of every group of test unit respectively with A
Phase cable 3, B phases cable 4 and C phases cable 5 connect, and A phases cable 3, B phases cable 4 are grounded after being connected with the other end of C phases cable 5.
Wherein, in three groups of test units, the first winding of each automatic coupling voltage regulator 1 just hold respectively with A, B, C three phase mains
Connection, first winding tail end link together ground connection.The secondary winding of each automatic coupling voltage regulator 1 just hold respectively with current lifting device 2 one
Secondary winding just holds connection, 1 secondary winding tail end of each automatic coupling voltage regulator to link together and connect with 2 first winding tail end of current lifting device
Ground.And each the power of automatic coupling voltage regulator 1 is 2KVA~5KVA.
In three groups of test units, the secondary winding of each current lifting device 2 is just held passes through ammeter 6 and A phases cable 3, B phases respectively
Cable 4 and C phases cable 5 connect, the secondary coil tail end ground connection of current lifting device 2.And the power of each current lifting device 2 be 2KVA~
5KVA。
A kind of method of inspection of the cross interconnected performance tests instrument of cable of the present invention is such：Three groups of experiments are set
Unit carries out cable metal sheath crossbonding earthed system to change the test current of service check, and is protected to cable metal
Electric current and voltage in layer cross connection grounding system measure judgement, realize and are grounded system to cable metal sheath crossbonding
The performance of system is tested；
Wherein, the input terminal of three groups of test units is connect with A, B, C three phase mains respectively, output end respectively with A phase cables
3, B phases cable 4 is connected with one end of C phases cable 5；Every group of test unit includes sequentially connected automatic coupling voltage regulator 1, current lifting device 2
It is connect respectively with A, B, C three phase mains with the automatic coupling voltage regulator 1 of ammeter 6, every group of test unit, the electric current of every group of test unit
Table 6 is connect with A phases cable 3, B phases cable 4 and C phases cable 5 respectively, A phases cable 3, B phases cable 4 and C phases cable 5 the other end
It is grounded after connection.
The above-mentioned three groups of test units of setting of the present invention are to change to cable metal sheath crossbonding earthed system progressive
Can examine test current refer to：Adjust the voltage number of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter
Value realizes the core electric current for changing simultaneously A phases cable 3, B phases cable 4 and C phases cable 5, is intersected to cable metal sheath with changing
Interconnect the test current that earthed system carries out service check.
The method of inspection specifically includes following steps：
The connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system is in correct connection by the first step
Position, and the voltage value of each automatic coupling voltage regulator 1 is adjusted according to the numerical value change of each ammeter 6 simultaneously so that A phase is electric
The core of cable 3, B phases cable 4 and C phases cable 5 is simultaneously by balanced electric current I, using as test current；
Second step measures the metallic sheath electric current I at the cross interconnected case1With voltage-to-ground V1；After measurement, according to every
The numerical value change of a ammeter 6 is come while adjusting the voltage value of each automatic coupling voltage regulator 1 so that and test current is reduced to zero,
And cut off A, B, C three phase mains；
Third walks, by the company of the connection sheet simulation mistake of cross interconnected case in cable metal sheath crossbonding earthed system
The mode of connecing connects, and adjusts the voltage value of each automatic coupling voltage regulator 1 simultaneously according to the numerical value change of each ammeter 6, makes
A phases cable 3, B phases cable 4 and C phases cable 5 core simultaneously by balanced electric current I, using as test current；
4th step measures the metallic sheath electric current I at the cross interconnected case2With voltage-to-ground V2；After measurement, according to every
The numerical value change of a ammeter 6 is come while adjusting the voltage value of each automatic coupling voltage regulator 1 so that and test current is reduced to zero,
And cut off A, B, C three phase mains；
5th step restores the connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system to correctly connecting
Position is connect, come further according to the numerical value change of each ammeter 6 while adjusting the voltage value of each automatic coupling voltage regulator 1 so that A phases
The core of cable 3, B phases cable 4 and C phases cable 5 is simultaneously by balanced electric current I, using as test current, and measures other friendships
Pitch the metallic sheath electric current I at mutual header3With voltage-to-ground V3；
6th step thinks that the performance of cable metal sheath crossbonding earthed system is good if meeting following Rule of judgment：
(1) metallic sheath electric current I1With metallic sheath electric current I3It is identical, and no more than the 3% of test current I；
(2) metallic sheath electric current I3It is less than I significantly less than metallic sheath electric current2；
(3) if done safeguard procedures, voltage kV1And kV3It is identical, it is below 200V；Otherwise, voltage kV1And kV3It is identical,
It is below 50V；Wherein,I4For core rated current.
Test current I in the present embodiment is 100A.
The power calculation of tester is such in the present embodiment：Due to A phases cable 3, B phases cable 4 and C phases cable 5
Length is identical with structure, the core of A phases cable 3, B phases cable 4 and C phases cable 5 by be again three-phase euqalizing current, this
Sample IA+IB+IC=0.
The electric current for so flowing through ground resistance RJ is theoretically zero, as shown in Figure 2, that is to say, that the power of test apparatus
Heating power when predominantly 100A test currents pass through cable core, the impedance Rz of cable be mainly Rz=R (D.C. resistance)+
R1 (kelvin effect resistance)+R2 (approach effect resistance), since added electric current is smaller (100A), and 800 squares are with upper section
Milliken conductor, therefore kelvin effect very little, can be ignored；Single-core cable lays the minimum 250mm of spacing, and spacing is relatively
Greatly, also unobvious, the influence of approach effect also can be neglected approach effect, therefore the resistance of cable can be come by D.C. resistance
It calculates.
(1000 squares of 110kV cables are more common), cable core conductor direct current by taking 1000 squares of cross-sections of cable as an example
Resistance is 0.0176 ohm/kilometer, and line length is by 10 kilometers of calculating (cable run be typically not greater than 10 kilometers), then A phases
In cable 3, B phases cable 4 and C phases cable 5, the power of single-phase cable loss is：
P=I2* R=100*100*0.0176*10=1760VA
It can be seen that the present invention is grounded after connecting A phases cable 3, B phases cable 4 with the other end of C phases cable 5, it can be significantly
Reduce test apparatus power of the present invention so that the tester is easy to remove and carries, to improve the convenience for using and examining
And practicability.
The secondary winding coil of the current lifting device 2 of the present embodiment can change, and according to core section and length, adjust current lifting device
The number of turns of 2 secondary windings increases or decreases the output voltage of winding, to meet the needs of test.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of test apparatus of the cross interconnected service check of cable, for cable metal sheath crossbonding earthed system into
Row service check, and connect with A, B, C three phase mains；It is characterized in that：Including three groups of test units；Three groups of test units it is defeated
Enter end to connect with A, B, C three phase mains respectively, output end is connect with one end of cable core A, B, C three-phase respectively；Every group of experiment
Unit includes sequentially connected automatic coupling voltage regulator, current lifting device and ammeter, the automatic coupling voltage regulator of every group of test unit respectively with A,
B, C three phase mains connects, and the ammeter of every group of test unit is connected with cable core A, B, C tri- respectively；The cable core
A, it is grounded after the other end connection of B, C three-phase.
2. the test apparatus of the cross interconnected service check of cable according to claim 1, it is characterised in that：Three groups of test sheets
In member, the first winding of each automatic coupling voltage regulator is just held to be connect with A, B, C three phase mains respectively, the connection of first winding tail end
It is grounded together.
3. the test apparatus of the cross interconnected service check of cable according to claim 1, it is characterised in that：Three groups of test sheets
In member, the secondary winding of each automatic coupling voltage regulator, which just holds just to hold with current lifting device first winding respectively, to be connect；Described in each certainly
Coupling pressure regulator secondary winding tail end links together and is grounded with current lifting device first winding tail end.
4. the test apparatus of the cross interconnected service check of cable according to claim 2, it is characterised in that：Described in each certainly
The power of coupling pressure regulator is 2KVA~5KVA.
5. the test apparatus of the cross interconnected service check of cable according to claim 1, it is characterised in that：Three groups of test sheets
In member, the secondary winding of each current lifting device is just held to be connected by ammeter with cable core A, B, C tri- respectively, current lifting device
Secondary coil tail end ground connection.
6. the test apparatus of the cross interconnected service check of cable according to claim 5, it is characterised in that：Each liter
The power for flowing device is 2KVA~5KVA.
7. a kind of method of inspection of the cross interconnected performance tests instrument of cable, it is characterised in that：Three groups of test units are set
To change the test current for carrying out service check to cable metal sheath crossbonding earthed system, and cable metal sheath is handed over
Electric current and voltage in fork interconnection earthed system measure judgement, realize to cable metal sheath crossbonding earthed system
Performance is tested；
The input terminal of three groups of test units is connect with A, B, C three phase mains respectively, output end respectively with cable core A, B, C
One end of three-phase connects；Every group of test unit includes sequentially connected automatic coupling voltage regulator, current lifting device and ammeter, every group of test sheet
The automatic coupling voltage regulator of member is connect with A, B, C three phase mains respectively, the ammeter of every group of test unit respectively with cable core A, B, C
Three are connected；It is grounded after the other end connection of cable core A, B, C three-phase.
8. the method for inspection of the cross interconnected performance tests instrument of cable according to claim 7, it is characterised in that：Institute
Three groups of test units of setting are stated to change the test current for carrying out service check to cable metal sheath crossbonding earthed system
Refer to：Adjust the voltage value of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter, realization changes simultaneously
The core electric current of cable core A, B, C three-phase carries out service check to change to cable metal sheath crossbonding earthed system
Test current.
9. the method for inspection of the cross interconnected performance tests instrument of cable according to claim 7, it is characterised in that：Institute
State setting three groups of test units with change to cable metal sheath crossbonding earthed system carry out service check test current,
And in cable metal sheath crossbonding earthed system electric current and voltage measure judgement, realize to cable metal sheath
It refers to including the following steps that the performance of cross connection grounding system, which is tested,：
The connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system is in correct connection position by the first step
It sets, and adjusts the voltage value of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter so that cable core
A, the core of B, C three-phase is simultaneously by balanced electric current I, using as test current；
Second step measures the metallic sheath electric current I at the cross interconnected case1With voltage-to-ground V1；After measurement, according to each electricity
The numerical value change of flow table is come while adjusting the voltage value of each automatic coupling voltage regulator so that test current is reduced to zero, and cuts off
A, B, C three phase mains；
Third walks, by the connection side of the connection sheet simulation mistake of cross interconnected case in cable metal sheath crossbonding earthed system
Formula connects, and adjusts the voltage value of each automatic coupling voltage regulator simultaneously according to the numerical value change of each ammeter so that cable
The core of core A, B, C three-phase is simultaneously by balanced electric current I, using as test current；
4th step measures the metallic sheath electric current I at the cross interconnected case2With voltage-to-ground V2；After measurement, according to each electricity
The numerical value change of flow table is come while adjusting the voltage value of each automatic coupling voltage regulator so that test current is reduced to zero, and cuts off
A, B, C three phase mains；
5th step restores the connection sheet of cross interconnected case in cable metal sheath crossbonding earthed system to correct connection position
It sets, come further according to the numerical value change of each ammeter while adjusting the voltage value of each automatic coupling voltage regulator so that cable core
A, the core of B, C three-phase is simultaneously by balanced electric current I, using as test current, and measures the gold at other cross interconnected casees
Belong to set electric current I3With voltage-to-ground V3；
6th step thinks that the performance of cable metal sheath crossbonding earthed system is good if meeting following Rule of judgment：
(1) metallic sheath electric current I1With metallic sheath electric current I3It is identical, and no more than the 3% of test current I；
(2) metallic sheath electric current I3It is less than I less than metallic sheath electric current2；
(3) if done safeguard procedures, voltage kV1And kV3It is identical, it is below 200V；Otherwise, voltage kV1And kV3It is identical, it is low
In 50V；Wherein,I4For core rated current.
10. the method for inspection of the cross interconnected performance tests instrument of cable according to claim 9, it is characterised in that：
The test current I is 100A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574164.3A CN108508327A (en) | 2018-06-06 | 2018-06-06 | A kind of test apparatus and its method of inspection of the cross interconnected service check of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574164.3A CN108508327A (en) | 2018-06-06 | 2018-06-06 | A kind of test apparatus and its method of inspection of the cross interconnected service check of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108508327A true CN108508327A (en) | 2018-09-07 |
Family
ID=63402960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810574164.3A Withdrawn CN108508327A (en) | 2018-06-06 | 2018-06-06 | A kind of test apparatus and its method of inspection of the cross interconnected service check of cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108508327A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881804A (en) * | 2021-01-18 | 2021-06-01 | 国网浙江省电力有限公司电力科学研究院 | Impedance spectrum measuring method and device for three-core cable |
| CN113219369A (en) * | 2021-05-13 | 2021-08-06 | 广东威恒输变电工程有限公司 | Test method for testing cross-connection performance of cables in laying site |
| CN113884815A (en) * | 2021-10-25 | 2022-01-04 | 国网江苏省电力有限公司电力科学研究院 | Device and method for testing maximum operation induction voltage of single-ended grounding system of high-voltage cable line |
-
2018
- 2018-06-06 CN CN201810574164.3A patent/CN108508327A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881804A (en) * | 2021-01-18 | 2021-06-01 | 国网浙江省电力有限公司电力科学研究院 | Impedance spectrum measuring method and device for three-core cable |
| CN112881804B (en) * | 2021-01-18 | 2023-08-15 | 国网浙江省电力有限公司电力科学研究院 | Impedance spectrum measurement method and device for three-core cable |
| CN113219369A (en) * | 2021-05-13 | 2021-08-06 | 广东威恒输变电工程有限公司 | Test method for testing cross-connection performance of cables in laying site |
| CN113884815A (en) * | 2021-10-25 | 2022-01-04 | 国网江苏省电力有限公司电力科学研究院 | Device and method for testing maximum operation induction voltage of single-ended grounding system of high-voltage cable line |
| CN113884815B (en) * | 2021-10-25 | 2024-04-16 | 国网江苏省电力有限公司电力科学研究院 | Method for testing maximum operation induction voltage of single-end grounding system of high-voltage cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108508327A (en) | A kind of test apparatus and its method of inspection of the cross interconnected service check of cable | |
| CN104246522A (en) | A method and an apparatus for detecting a fault in an hvdc power transmission system | |
| CN107807282A (en) | The method of tested media loss factor and capacitance under transformer non-dismantle high voltages fuse | |
| CN101403779A (en) | Parameter measuring apparatus and system for high tension power line | |
| CN111638423B (en) | Positioning method for ground faults of power cable sheath layer and armor layer | |
| CN102128983A (en) | Method for measuring phase of power transmission and distribution line | |
| CN110108943A (en) | Drainage thread measuring transformer dielectric loss, the method for capacitance and insulation resistance are not disassembled | |
| CN115436839A (en) | High-voltage single-core cable sheath circulating current testing method | |
| CN106451220A (en) | Bypass equipment and method for live replacement of equipment on same-tower multi-loop pole tower | |
| CN113219369A (en) | Test method for testing cross-connection performance of cables in laying site | |
| CN208580172U (en) | One kind being grounded situation device for fast detecting for power system device | |
| CN205429680U (en) | Cable cross -bonding case | |
| CN109283421A (en) | A kind of rail traction substation low-voltage is powered detection test method and device | |
| CN111257794B (en) | Transformer substation grounding device thermal stability checking method based on conduction test | |
| CN113109662A (en) | Method and system for determining relative aging degree of cable based on interphase relative dielectric loss | |
| CN110045188A (en) | A kind of system and method for not removing high-side lead measuring transformer insulation resistance | |
| CN108845183B (en) | Multi-electric aircraft cable impedance measurement method | |
| CN107271775B (en) | electric power overhead line phase detection method | |
| Guo et al. | A method of 20 kV cable line fault location based on sheath grounding current | |
| CN208283500U (en) | A kind of test apparatus of the cross interconnected service check of cable | |
| Palmer-Buckle et al. | Characteristics of transformer parameters during internal winding faults based on experimental measurements | |
| CN111537797B (en) | System and method for measuring insulation resistance of transformer substation without disassembling lead | |
| CN113156276B (en) | Method for checking and debugging secondary voltage loop of bus alternating-current withstand voltage test of switching equipment | |
| CN103983853A (en) | Phase position check method of high voltage cable frogging interconnected system | |
| CN107449987A (en) | Based on the test method of transferring the files for not tearing 750 kv transformer high pressure lead technologies open |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180907 |
|
| WW01 | Invention patent application withdrawn after publication |