CN105823936B - A kind of extension type current transformer ratio test device - Google Patents
A kind of extension type current transformer ratio test device Download PDFInfo
- Publication number
- CN105823936B CN105823936B CN201610303342.XA CN201610303342A CN105823936B CN 105823936 B CN105823936 B CN 105823936B CN 201610303342 A CN201610303342 A CN 201610303342A CN 105823936 B CN105823936 B CN 105823936B
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- China
- Prior art keywords
- base
- throat
- trigger
- gun barrel
- hole
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
-
- 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
-
- 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
- G01R1/0425—Test clips, e.g. for IC's
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Insulating Bodies (AREA)
Abstract
The present invention relates to power test equipment subtest field, and in particular to a kind of extension type current transformer ratio reference test bar.Including more than one insulating bar, crocodile clip, the gun body of control crocodile clip linkage, pull rope, insulation annealed copper wire, binding post, it is characterised in that：Described insulating bar carries inner sleeve and outer sleeve, and the base of described crocodile clip and its axis angle at 45 °, described gun body include gun barrel, and rifle is held, trigger, and one end of trigger enters in gun barrel and in the end end set lacing hole through trigger hole；Compared with prior art, the present invention meets ergonomics, is held when people holds rifle on the other hand, when the other hand is held insulating bar and forward extended out, the insulating bar angle at 45 ° substantially with ground, therefore the crocodile clip on head of the present invention arranges that manipulation is accurate with 45 degree of inclined directions.And the present invention intends rifle design, moulding uniqueness.
Description
Technical field
This invention is related to power test equipment subtest field, and in particular to a kind of extension type current transformer ratio
Test device.
Background technology
Protection test personnel are in Current Transformer tester to parameters such as current transformer ratios in switch cabinet of converting station
When being tested, because switch cubicle hyperbaric chamber is more narrow and small, and current transformer is in hyperbaric chamber depths, in current transformer one
Wiring is more difficult on secondary copper bar.All it is to creep into switch cubicle internal wiring using the personnel of slight of stature at present, it is bothersome laborious, if for difficulty
With the small switch cubicle of entrance often by substation field insulating bar, testing wire clamp is bound and is sent to current transformer flat copper line
On, but this method is lost time, while contact bad influence test result.
Publication No. CN203909260U Chinese utility model patent discloses a kind of transformer substation current transformer no-load voltage ratio
Plug-in type junction pole, including conductive hook are used in test, and conductive elastic card is fixed in the hook portion of hook,
Bolt is fixed with hook；The section of the hook is groove-like structure, and one is provided with the coupler body of a termination of hook
Individual bar hole；It is plugged with the bar hole of the hook with linking up with the plug-in type insulation bar matched, the plug-in type insulation bar wraps again
Include at least two connecting rods；There is bar hole in the connecting rod, pass through spiral shell at bar hole after being mutually inserted between connecting rod
Bolt is fixed as one to form plug-in type insulation bar；Connecting rod close to hook after hook grafting with causing bar hole and the connecting rod
On bar hole fitting after be integrated by being bolted.Although the technical scheme can remotely carry out current transformer change
Than test, but due to being to hold plug-in type insulation bar by operating personnel to lift hook to Current Mutual Inductance respectively in test process
At the connecting wire of device both sides, it is stuck in by elastic card on wire, realizes that strong current generator turns on progress with current transformer
Test.But because elasticity and wire are snap-fit relationships, jitter phenomenon inevitably occurs in operation, so as to cause electricity
Rheology, influence test result.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of survey of scalable formula current transformer ratio
Trial assembly is put, and conveniently can deftly be connected primary line, is easy to measure and ensure the accuracy of measurement result.
Therefore, the present invention adopts the technical scheme that：
A kind of extension type current transformer ratio test device, including more than one insulating bar 1, crocodile clip 2, control
The gun body 3 of crocodile clip linkage, pull rope 4, insulation annealed copper wire 5, binding post 6, it is characterised in that：
The female inner sleeve 12 of the affixed band in one end of described insulating bar 1, the other end are affixed with externally threaded outer
Sleeve 13, in addition the inner sleeve of an insulating bar can be screwed with the outer sleeve of this root insulating bar, opened up on the body of rod 11 of insulating bar
The fairlead 14 that insulation annealed copper wire 5 passes can be held；
Described crocodile clip is cut with scissors including base 21, the lower clamping part 22 being fixed together with base 21, with lower clamping part 22
The upper clamping part connect 23, two leaf springs 24, bearing pins 25；The internal thread that described base one end carries can revolve with insulating bar outer sleeve
Close, the other end of base sets the oblong-shaped ramps 211 with its axis angle at 45 °, in the short-axis direction of oblong-shaped ramps
The upper notch 212 set perpendicular to the inclined-plane, set in the side wall of base and hold the square hole 213 that binding post 6 passes through；Lower clamping part 22
Including oval throat 220 corresponding with the oblong-shaped ramps shape of base 21, throat sets the pipe with the oblong-shaped ramps of base 21
The throat 221 of the corresponding ellipse of chamber shape, throat lower section set the boss coordinated with the notch 212 of base along short-axis direction
222, plate 223 is cut with scissors under being set in throat side, throat's opposite side oliquely downward extends to form lower rhynchodaenm 224；Upper clamping part 23 wraps
Maxilla portion 230 is included, the one end in maxilla portion, which is set, cuts with scissors plate 231, and maxilla portion extends to form rhynchodaenm 232 obliquely upward, maxilla portion
The upper chute 234 that the cord hole 233 held pull rope 4 and passed through is also set up corresponding to throat center, holds leaf spring activity in it；Lower hinge plate
223 joined with upper hinge plate 231 by bearing pin 25 together with, leaf spring 24 is arranged on bearing pin 25, one end of leaf spring 24, which is set, is against larynx
On hole 221, the other end is against in chute 234；
One end of described pull rope 4 passes through the tube chamber of base 21, the throat 221 of lower clamping part 22, the cord hole 233 in maxilla portion
An affixed latch segment 41 afterwards；
One end of described insulation annealed copper wire 5 passes through the tube chamber of base 21 and passes through binding post 6 and base 21 in tube chamber
Link together；
Described binding post 6 includes baffle plate 61, quadrangular that is being connected as a single entity with baffle plate and coordinating with the square hole on base
62, the wiring hole 63 for setting on quadrangular 62 insulation annealed copper wire the end of a thread after holding peeling to penetrate, the spiral shell being connected as a single entity with quadrangular
Bar 64, the nut 65 coordinated with screw rod；
Described gun body 3 includes gun barrel 31, and rifle holds 32, and trigger 33, one end of the gun barrel 31 carries and insulating bar inner sleeve
The external screw threads 311 that screw of cylinder 12, sets a pair laterally to perforation and longitudinal trigger hole 312 in the side wall of gun barrel 31, in perforation
A bolt 34 is penetrated, pulley 35 is arranged on the bolt in gun barrel, is arranged support 36, support 36 on the bolt of both sides outside gun barrel
It is fixed in by nut 37 on gun barrel, support 36 extends to form trigger housing 38 to gun barrel external screw thread direction, and the lower section of support 36 is affixed
Rifle holds 32, and trigger 33 is hinged on trigger housing 38, and one end of trigger 33 enters in gun barrel through trigger hole 312 and set in the end end
Put lacing hole；
The other end of described pull rope 4 penetrates after the lacing hole on trigger admittedly after passing through gun barrel after the steering of pulley 35
It is fixed.
Further, there is 200 ° -210 ° of angle, the lower surface of upper rhynchodaenm with plane in throat in the upper plane of lower rhynchodaenm
200 ° -210 ° of angle be present with the lower surface in maxilla portion.
Further, the upper surface of lower rhynchodaenm, the lower surface of upper rhynchodaenm set sawtooth tooth 235.
Compared with prior art, the present invention meets ergonomics, is held when people holds rifle on the other hand, the other hand holds insulating bar
And when forward extending out, the insulating bar angle at 45 ° substantially with ground, therefore the crocodile clip on head of the present invention is inclined with 45 degree
Direction arranges that manipulation is accurate.And the present invention intends rifle design, moulding uniqueness.
Brief description of the drawings
Fig. 1 is the structural representation after present invention assembling.
Fig. 2 is the structural representation of insulating bar of the present invention.
Fig. 3 is the structural representation of crocodile clip of the present invention.
Fig. 4 is the structural representation at another visual angle of crocodile clip of the present invention.
Fig. 5 is the enlarged drawing at Fig. 4 dashed boxes.
Fig. 6 is the explosive view of crocodile clip of the present invention.
Fig. 7 is the structure front view of gun body of the present invention.
Fig. 8 is the structural representation at another visual angle of gun body of the present invention.
Fig. 9 is Fig. 8 sectional view.
Embodiment
Referring to Fig. 1-9, a kind of extension type current transformer ratio test device, including more than one insulating bar 1, crocodile
Fish folder 2, the gun body 3 of control crocodile clip linkage, pull rope 4, insulation annealed copper wire 5, binding post 6, it is characterised in that：
The female inner sleeve 12 of the affixed band in one end of described insulating bar 1, the other end are affixed with externally threaded outer
Sleeve 13, in addition the inner sleeve of an insulating bar can be screwed with the outer sleeve of this root insulating bar, opened up on the body of rod 11 of insulating bar
The fairlead 14 that insulation annealed copper wire 5 passes can be held；
Described crocodile clip is cut with scissors including base 21, the lower clamping part 22 being fixed together with base 21, with lower clamping part 22
The upper clamping part connect 23, two leaf springs 24, bearing pins 25；The internal thread that described base one end carries can revolve with insulating bar outer sleeve
Close, the other end of base sets the oblong-shaped ramps 211 with its axis angle at 45 °, in the short-axis direction of oblong-shaped ramps
The upper notch 212 set perpendicular to the inclined-plane, set in the side wall of base and hold the square hole 213 that binding post 6 passes through；Lower clamping part 22
Including oval throat 220 corresponding with the oblong-shaped ramps shape of base 21, throat sets the pipe with the oblong-shaped ramps of base 21
The throat 221 of the corresponding ellipse of chamber shape, throat lower section set the boss coordinated with the notch 212 of base along short-axis direction
222, plate 223 is cut with scissors under being set in throat side, throat's opposite side oliquely downward extends to form lower rhynchodaenm 224；Upper clamping part 23 wraps
Maxilla portion 230 is included, the one end in maxilla portion, which is set, cuts with scissors plate 231, and maxilla portion extends to form rhynchodaenm 232 obliquely upward, maxilla portion
The upper chute 234 that the cord hole 233 held pull rope 4 and passed through is also set up corresponding to throat center, holds leaf spring activity in it；Lower hinge plate
223 joined with upper hinge plate 231 by bearing pin 25 together with, leaf spring 24 is arranged on bearing pin 25, one end of leaf spring 24, which is set, is against larynx
On hole 221, the other end is against in chute 234；
One end of described pull rope 4 passes through the tube chamber of base 21, the throat 221 of lower clamping part 22, the cord hole 233 in maxilla portion
An affixed latch segment 41 afterwards；
One end of described insulation annealed copper wire 5 passes through the tube chamber of base 21 and passes through binding post 6 and base 21 in tube chamber
Link together；
Described binding post 6 includes baffle plate 61, quadrangular that is being connected as a single entity with baffle plate and coordinating with the square hole on base
62, the wiring hole 63 for setting on quadrangular 62 insulation annealed copper wire the end of a thread after holding peeling to penetrate, the spiral shell being connected as a single entity with quadrangular
Bar 64, the nut 65 coordinated with screw rod；
Described gun body 3 includes gun barrel 31, and rifle holds 32, and trigger 33, one end of the gun barrel 31 carries and insulating bar inner sleeve
The external screw threads 311 that screw of cylinder 12, sets a pair laterally to perforation and longitudinal trigger hole 312 in the side wall of gun barrel 31, in perforation
A bolt 34 is penetrated, pulley 35 is arranged on the bolt in gun barrel, is arranged support 36, support 36 on the bolt of both sides outside gun barrel
It is fixed in by nut 37 on gun barrel, support 36 extends to form trigger housing 38 to gun barrel external screw thread direction, and the lower section of support 36 is affixed
Rifle holds 32, and trigger 33 is hinged on trigger housing 38, and one end of trigger 33 enters in gun barrel through trigger hole 312 and set in the end end
Put lacing hole；
The other end of described pull rope 4 penetrates after the lacing hole on trigger admittedly after passing through gun barrel after the steering of pulley 35
It is fixed.
205 ° of angle, the lower surface of upper rhynchodaenm and the following table in maxilla portion with plane in throat be present in the upper plane of lower rhynchodaenm
205 ° of angle be present in face.
The upper surface of lower rhynchodaenm, the lower surface of upper rhynchodaenm set sawtooth tooth 235.
Each several part is fitted together during use, according to the far and near selection one being devices under or more with insulating bar, and
So that pull rope is in tensioning state, and insulation annealed copper wire is connected on current transformer calibrator, then holds insulation on the other hand
Bar, rifle is held on the other hand and holds and forefinger is buckled on trigger, crocodile clip is protracted so that upper and lower retaining part is in being devices under
Upper and lower, the index finger pull trigger action of flat copper line, the upper and lower clamping part occlusion of crocodile clip so that insulation annealed copper wire is fully taken with flat copper line
Connect, electric current and potential conduction verify to completion on current transformer calibrator.
Claims (3)
1. a kind of extension type current transformer ratio test device, including more than one insulating bar（1）, crocodile clip（2）, control
The gun body of crocodile clip linkage processed（3）, pull rope（4）, insulation annealed copper wire（5）, binding post（6）, it is characterised in that：
Described insulating bar（1）The female inner sleeve of the affixed band in one end（12）, the other end is affixed to be carried outside externally threaded
Sleeve（13）, in addition the inner sleeve of an insulating bar can be screwed with the outer sleeve of this root insulating bar, the body of rod of insulating bar（11）On
Insulation annealed copper wire can be held by opening up（5）The fairlead passed（14）；
Described crocodile clip includes base（21）With base（21）The lower clamping part being fixed together（22）And lower clamping part
（22）Be hinged upper clamping part（23）, two leaf springs（24）, bearing pin（25）；The internal thread that described base one end carries can be with insulation
Bar outer sleeve screws, and the other end of base sets the oblong-shaped ramps with its axis angle at 45 °（211）, oval oblique
Notch perpendicular to the inclined-plane is set on the short-axis direction in face（212）, set in the side wall of base and hold binding post（6）The side passed through
Hole（213）；Lower clamping part（22）Including with base（21）Oblong-shaped ramps shape oval throat accordingly（220）, throat sets
Put and base（21）The throat of the corresponding ellipse of the lumen shape of oblong-shaped ramps（221）, throat lower section is set along short-axis direction
Put the notch with base（212）The boss of cooperation（222）, plate is cut with scissors under being set in throat side（223）, throat it is another it is lateral tiltedly under
Fang Yanshen forms lower rhynchodaenm（224）；Upper clamping part（23）Including maxilla portion（230）, the one end in maxilla portion, which is set, cuts with scissors plate
（231）, maxilla portion extends to form rhynchodaenm obliquely upward（232）, appearance pull rope is also set up corresponding to throat center in maxilla portion
（4）The cord hole passed through（233）, hold the chute of leaf spring activity in it（234）；Lower hinge plate（223）With upper hinge plate（231）Pass through pin
Axle（25）Join together, bearing pin（25）On be arranged leaf spring（24）, leaf spring（24）One end set be against throat（221）On, separately
One end is against chute（234）It is interior；
Described pull rope（4）One end pass through base（21）Tube chamber, lower clamping part（22）Throat（221）, maxilla portion rope
Hole（233）An affixed latch segment afterwards（41）；
Described insulation annealed copper wire（5）One end pass through base（21）Tube chamber and pass through binding post in tube chamber（6）With base
（21）Link together；
Described binding post（6）Including baffle plate（61）, quadrangular that is being connected as a single entity with baffle plate and coordinating with the square hole on base
（62）, quadrangular（62）The wiring hole that upper insulation annealed copper wire the end of a thread set after holding peeling penetrates（63）, one is linked as with quadrangular
The screw rod of body（64）, the nut with screw rod cooperation（65）；
Described gun body（3）Including gun barrel（31）, rifle holds（32）, trigger（33）, the gun barrel（31）One end carry and insulation
Bar inner sleeve（12）The external screw thread screwed（311）, gun barrel（31）Side wall on set a pair laterally to perforation and trigger hole
（312）, to penetrating a bolt in perforation（34）, pulley is arranged on the bolt in gun barrel（35）, the bolt of both sides outside gun barrel
On be arranged support（36）, support（36）Pass through nut（37）It is fixed on gun barrel, support（36）Extend to gun barrel external screw thread direction
Form trigger housing（38）, support（36）The affixed rifle in lower section is held（32）, trigger housing（38）Upper be hinged trigger（33）, trigger（33）One
Hold through trigger hole（312）In into gun barrel and in the end end set lacing hole；
Described pull rope（4）The other end pass through gun barrel after around pulley（35）Penetrated after steering after the lacing hole on trigger admittedly
It is fixed.
A kind of 2. extension type current transformer ratio test device according to claim 1, it is characterised in that：Lower rhynchodaenm
Upper plane and throat on plane 200 ° -210 ° of angle be present, the lower surface of upper rhynchodaenm exists with the lower surface in maxilla portion
200 ° -210 ° of angle.
A kind of 3. extension type current transformer ratio test device according to claim 1, it is characterised in that：Lower rhynchodaenm
Upper surface, upper rhynchodaenm lower surface set sawtooth tooth（235）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610303342.XA CN105823936B (en) | 2016-05-10 | 2016-05-10 | A kind of extension type current transformer ratio test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610303342.XA CN105823936B (en) | 2016-05-10 | 2016-05-10 | A kind of extension type current transformer ratio test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105823936A CN105823936A (en) | 2016-08-03 |
| CN105823936B true CN105823936B (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610303342.XA Expired - Fee Related CN105823936B (en) | 2016-05-10 | 2016-05-10 | A kind of extension type current transformer ratio test device |
Country Status (1)
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| CN (1) | CN105823936B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841692A (en) * | 2016-12-16 | 2017-06-13 | 国网北京市电力公司 | Subtest component |
| CN107677871B (en) * | 2017-07-11 | 2020-09-18 | 国网浙江义乌市供电公司 | Adjustable clamp type ammeter with display |
| CN108594154A (en) * | 2018-04-12 | 2018-09-28 | 广东电网有限责任公司 | A kind of binding clip of verification transformer station direct current system leakage current mutual inductor |
| CN109188172B (en) * | 2018-09-18 | 2024-03-15 | 国家电网有限公司 | Portable transformer wire gun |
| CN112666377A (en) * | 2020-12-31 | 2021-04-16 | 国网河南省电力公司南阳供电公司 | Cubical switchboard three-phase generating line current measuring device |
| CN114994516B (en) * | 2022-08-03 | 2022-10-11 | 深圳市速德瑞科技有限公司 | Portable waterproof circuit pulse signal detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0000367A1 (en) * | 1977-07-14 | 1979-01-24 | HERM. SPRENGER GmbH & Co. KG | Safety hook |
| CN203365482U (en) * | 2013-07-25 | 2013-12-25 | 国家电网公司 | Live-line test rod for internal lightning arrester of gas insulated metallic enclosing switch |
| CN204008724U (en) * | 2014-08-04 | 2014-12-10 | 国家电网公司 | Converting equipment dielectric voltage withstand test connection bar |
| CN204065312U (en) * | 2014-08-05 | 2014-12-31 | 国家电网公司 | Bus current mutual inductor special no-load voltage ratio detector |
| CN105116172A (en) * | 2015-08-18 | 2015-12-02 | 国网山西省电力公司检修分公司 | A junction pole specially used for live tests of 35kV lighting arrester leakage currents |
| CN205608097U (en) * | 2016-05-10 | 2016-09-28 | 国网山东省电力公司莱州市供电公司 | Retractable current transformer transformation ratio testing arrangement |
-
2016
- 2016-05-10 CN CN201610303342.XA patent/CN105823936B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0000367A1 (en) * | 1977-07-14 | 1979-01-24 | HERM. SPRENGER GmbH & Co. KG | Safety hook |
| CN203365482U (en) * | 2013-07-25 | 2013-12-25 | 国家电网公司 | Live-line test rod for internal lightning arrester of gas insulated metallic enclosing switch |
| CN204008724U (en) * | 2014-08-04 | 2014-12-10 | 国家电网公司 | Converting equipment dielectric voltage withstand test connection bar |
| CN204065312U (en) * | 2014-08-05 | 2014-12-31 | 国家电网公司 | Bus current mutual inductor special no-load voltage ratio detector |
| CN105116172A (en) * | 2015-08-18 | 2015-12-02 | 国网山西省电力公司检修分公司 | A junction pole specially used for live tests of 35kV lighting arrester leakage currents |
| CN205608097U (en) * | 2016-05-10 | 2016-09-28 | 国网山东省电力公司莱州市供电公司 | Retractable current transformer transformation ratio testing arrangement |
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| Publication number | Publication date |
|---|---|
| CN105823936A (en) | 2016-08-03 |
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