CN209432881U - A kind of current transformer charging actual measurement electric capacitance change - Google Patents

Abstract

The utility model relates to current transformer fields, specifically a kind of current transformer that can charge actual measurement electric capacitance change, including a body and cabinet, one time body is set in cabinet, one time body includes Primary Conductor, end shield and vice screen, end shield is enclosed on the outside of the U-shaped end of Primary Conductor, vice screen is enclosed on the outside of end shield, and isolated insulation layer is equipped between Primary Conductor and end shield and between end shield and vice screen, the whole outside of body is enclosed with external insulation layer, end shield is connected by end shield lead with a capacitance measuring tester, and the capacitance measuring tester ground connection, vice screen is directly grounded by vice screen lead, it is corresponding with end shield and vice screen connected to pass through route respectively for body socket there are two setting on a body, in end shield lead and terminal pin is equipped with vice screen wire ends is connected with corresponding body socket.The utility model is by the variation of end shield electric current come the variation of real-time monitoring mutual inductor major insulation capacitance, and when capacitor breaks down, operating personnel can early prepare and repair processing.

Description

A kind of current transformer charging actual measurement electric capacitance change

Technical field

The utility model relates to current transformer field, specifically a kind of electric current that can charge actual measurement electric capacitance change Mutual inductor.

Background technique

Current transformer in the prior art at runtime, sometimes due to mutual inductor can occur for mutual inductor Insulation Problems itself Failure, such as insulation breakdown, and be no any sign before current transformer breaks down, it is not see mutually from surface Sensor itself whether there is problem, if mutual inductor occurs, when shelf depreciation is larger or dielectric loss is larger, insulating layer will be by one layer Layer electrical breakdown eventually leads to mutual inductor tolerance and does not live voltage and explode, and in addition network system overtension can also make electricity Current transformer is destroyed.But when current transformer is in operating status, itself it is electrification, can not be tested and Prove whether mutual inductor is problematic.

In addition as shown in figure 9, in the prior art, U-typed body of current transformer is stood in cabinet, and body bottom end is set On body seat on the upside of one in cambered surface, and body center bottom is fixed with a fixed plate, and user is in use, P1 is connected Terminal is coupled with conducting wire respectively with P2 connection terminal, thus make P1 connection terminal with P2 connection terminal respectively by phase outside Pulling force F1 and F2, it is generally the case that the conductor length on both sides is different, or be on one side conducting wire connection, be pipe on one side Mother connects, and the pulling force F2 that the pulling force F1 and P2 connection terminal that such P1 connection terminal is subject to is subject to is different, it is easy to be led The side inclination that a body is big to pulling force is caused, because fixing fixation plate thickness used in a body bottom end usually only 1.0mm, stress is limited, and current transformer at runtime, just must be at horse back power failure if it find that there is body inclination conditions Reason, certain economic loss is caused to substation.

Again as shown in Figure 10, in the prior art, set on cabinet there are two watt seat, a U-typed body it is vertical it is good after, open Two ends of mouthful side are each passed through corresponding watt of seat, and are fixed with certain thickness tile, are then withstood watt with bolt Piece, but certain alignment watt seat center, meeting can not be completely secured since tile thickness cannot change, when erecting a body There are certain deviations, allow for that the position that body has is too tight, and some positions are too loose in this way, firmly uneven to a body, It is easy to make a body to generate screen sliding phenomenon in this way, and watt has certain gap between seat and tile, rainwater is also easy to lead to Gap is crossed to enter in cabinet.

Utility model content

The purpose of this utility model is to provide the current transformers that one kind can charge actual measurement electric capacitance change, pass through end shield The variation of electric current carrys out the variation of real-time monitoring mutual inductor major insulation capacitance, and when capacitor breaks down, operating personnel can early do standard Standby to repair processing, in addition the utility model fixes a body using casting fixed form, guarantees a body fix tightly It leans on and uniform force, while guaranteeing that rainwater may not flow into cabinet.

The purpose of this utility model is achieved through the following technical solutions:

A kind of current transformer charging actual measurement electric capacitance change, including a body and cabinet, a body setting In in cabinet, a body includes Primary Conductor, end shield and vice screen, is enclosed on the outside of the U-shaped end of the Primary Conductor End shield, the end shield outside is enclosed with vice screen, and is equipped between the Primary Conductor and end shield and between end shield and vice screen Isolated insulation layer, the whole outside of a body are enclosed with external insulation layer, and the end shield passes through end shield lead and a capacitor Tester is connected, and the capacitance measuring tester is grounded, and the vice screen is directly grounded by vice screen lead, on a body If passing through respectively there are two body socket, route is corresponding with the end shield and vice screen to be connected, and draws in the end shield lead and with vice screen Thread end is equipped with terminal pin and is connected with corresponding body socket.

The body socket includes shell, sliding sleeve and spring, and the shell is fixedly arranged on a body, in the shell Equipped with plug mounting base, plug mounting base front end is equipped with the first connection terminal, and the sliding sleeve and spring are set to shell It is interior, and sliding sleeve is sheathed in the plug mounting base, spring pocket is set on the sliding sleeve, and the terminal pin front end is equipped with Second connection end and outer sleeve, and second connection end is set in the outer sleeve, when connection, the sliding sleeve passed through The outer sleeve promotion moves back and compresses the spring, and second connection end is connected with the first connection terminal grafting.

The housing forward end is equipped with baffle, and the baffle is articulated on shell by hinged shaft, and the hinged shaft is equipped with and turns round Spring.

The baffle is equipped with a folded plate portion, and when baffle closure, the folded plate portion is placed on the outside of housing forward end.

It is equipped with body seat in the bottom of box, a body bottom end is placed on the body seat and fixes by a fixed plate In the bottom of box, it is equipped with fixed casting portion in the bottom of box, and the body seat and fixed plate are all set in the fixation In casting portion.

Body seat upper surface is in cambered surface, and one time body bottom end is placed in the cambered surface.

Set on the upside of the box roof there are two watt seat, and two ends on the upside of a body be each passed through it is corresponding Watt seat, a body upper side end with connection pouring layer is equipped between corresponding watt of seat.

Two ends of side opening are connected after being each passed through corresponding watt of seat with corresponding terminal post on body.

The cabinet includes upper box and lower box, and the lower box internal diameter is less than upper box, in the lower box upper end Outside is equipped with pivot flange, and the tank wall lower end of the upper box is bolted on the pivot flange outer end, fixed casting Portion is set to lower box bottom.

The advantages of the utility model and good effect are as follows:

1, the utility model is realized by the variation of end shield electric current come the variation of real-time monitoring mutual inductor major insulation capacitance Mutual inductor charges real-time monitoring, and when capacitor breaks down, operating personnel can early prepare and repair processing.

2, it is corresponding with end shield and vice screen to pass through route respectively for body socket there are two setting on a body of the utility model It is connected, is equipped with terminal pin in end shield lead and with vice screen wire ends, when needing to test, terminal pin is inserted into corresponding The connection that end shield lead and end shield and vice screen lead and vice screen can be realized on body socket, in addition sets on the body socket There are the safeguard structures such as shell, sliding sleeve, baffle, avoid the first connection terminal in body socket exposed, guarantees equipment operation peace Entirely.

3, the utility model is equipped with fixed casting portion in the bottom of box and a body is auxiliarily fixed, though P1 connection terminal and P2 connection terminal under tension has a certain difference, body will not run-off the straight, while also increasing cabinet base intensity.

4, the utility model casting epoxy resin in watt seat forms connection pouring layer and fixes a body end, both guarantees Body end uniform force, and there is no gaps, and rainwater to be allowed to flow into cabinet between watt seat and a body end, Tile structure is also eliminated simultaneously, reduces processing cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model,

Fig. 2 is a body U-shaped bottom end partial enlargement diagram in Fig. 1,

Fig. 3 is the body socket and terminal pin structural schematic diagram in Fig. 2,

Fig. 4 is the schematic diagram when body socket in Fig. 3 is connect with terminal pin,

Fig. 5 is not connected with schematic diagram when terminal pin for the body socket in Fig. 3,

Fig. 6 is the connection terminal schematic diagram on capacitance measuring tester,

Fig. 7 is the fixed schematic diagram of a body of the utility model,

Fig. 8 is enlarged drawing at the A in Fig. 7,

Fig. 9 is the fixed schematic diagram of a body in the prior art,

Figure 10 is enlarged drawing at the B in Fig. 9.

Wherein, 1 is a body, and 101 be end shield lead, and 102 be capacitance measuring tester, and 103 be vice screen lead, and 104 be outer Insulating layer, 105 be Primary Conductor, and 106 be end shield, and 107 be vice screen, and 108 be body socket, and 1081 be shell, and 1082 be plug Mounting base, 1083 be sliding sleeve, and 1084 be the first connection terminal, and 1085 be spring, and 1086 be baffle, and 1087 be hinged shaft, 1088 It is terminal pin for folded plate portion, 109,1091 be second connection end, and 1092 be outer sleeve, and 110 be isolated insulation layer, and 2 be case Body, 201 be upper box, and 202 be lower box, and 203 be pivot flange, and 3 be fixed plate, and 4 be body seat, and 5 be tile, and 6 be bolt, 7 be watt seat, and 8 be fixed casting portion, and 9 be connection pouring layer, and 10 be connection terminal.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

As shown in Fig. 1~5, the utility model includes a body 1 and cabinet 2, and one time body 1 is set in cabinet 2, such as Shown in Fig. 2, a body 1 includes Primary Conductor 105, end shield 106 and vice screen 107, in the U-shaped of the Primary Conductor 105 End outside is enclosed with end shield 106, is enclosed with vice screen 107 on the outside of the end shield 106, and the Primary Conductor 105 and end shield 106 it Between and end shield 106 and vice screen 107 between be equipped with isolated insulation layer 110, the whole outside of a body 1 be enclosed with it is outer absolutely Edge layer 104, the end shield 106 is connected by end shield lead 101 with a capacitance measuring tester 102, and the capacitance measuring tester 102 Ground connection, the vice screen 107 are directly grounded by vice screen lead 103, set that there are two body sockets 108 on a body 1 It is connected respectively by the way that route is corresponding with the end shield 106 and vice screen 107, as seen in figures 3-5, the end shield lead 101 and and pair Screen 103 end of lead is equipped with terminal pin 109 and is connected with corresponding body socket 108.In the present embodiment, the end shield 106 It is aluminium foil with 107 material of vice screen, the isolated insulation layer 110 and 104 material of external insulation layer are polytetrafluoroethylene tape.

The major insulation of the utility model uses capacitance plate cascaded structure, as long as there is sub-fraction capacitance plate to puncture, meeting Major insulation capacitance is caused to become larger, so as to cause once becoming larger to earth-current, wherein end shield 106 passes through capacitance measuring tester 102 again Ground connection, the capacitance measuring tester 102 can monitor the change of mutual inductor major insulation capacitance by the variation of 106 electric current of end shield Change, if some capacitor of mutual inductor breaks down, capacitance measuring tester 102 can make prompt, and operating personnel can early do standard It is standby, processing is repaired to mutual inductor.The capacitance measuring tester 102 is techniques well known and is commercial products.

As seen in figures 3-5, the body socket 108 includes shell 1081, sliding sleeve 1083 and spring 1085, the shell Body 1081 is fixedly arranged on a body 1, is equipped with plug mounting base 1082 in the shell 1081, before the plug mounting base 1082 End is equipped with the first connection terminal 1084, and the sliding sleeve 1083 and spring 1085 are set in shell 1081, and sliding sleeve 1083 It is sheathed in plug mounting base 1082, spring 1085 is sheathed on the sliding sleeve 1083, and 1085 rear end of spring is fixedly arranged on In shell 1081,1085 front end of spring and the 1083 front end outer of sliding sleeve are connected, and the first connection terminal 1084 is set In the sliding sleeve 1083,109 front end of terminal pin is equipped with second connection end 1091 and outer sleeve 1092, and described Second connection end 1091 is set in the outer sleeve 1092, as shown in figure 4, the outer sleeve 1092 enters body inserts when connection It offsets in the shell 1081 of seat 108 and with the sliding sleeve 1083, and then sliding sleeve 1083 is pushed to move back compressed spring 1085, together When outer sleeve 1092 in second connection end son 1091 Forward realize with body socket 108 in 1084 grafting of the first connection terminal Be connected, thus realize end shield lead 101 or vice screen lead 103 in a body 1 end shield 106 or vice screen 107 be connected, when drawing When line plug 109 is extracted, as shown in figure 5, the sliding sleeve 1083 automatically resets under the effect of spring 1085.

In addition as seen in figures 3-5, it is equipped with baffle 1086 in 1081 front end of shell, the baffle 1086 passes through hinged shaft 1087 are articulated on shell 1081, and the hinged shaft 1087 is equipped with torsional spring, and operating personnel opens baffle 1086, grafting when grafting Baffle 1086 is unclamped afterwards, and the baffle 1086 is taken under the effect of torsion spring is put in the certain protection work of 109 back-end realization of terminal pin With, and when terminal pin 109 is extracted, baffle 1086 closes automatically in torsional spring effect blocks 108 front opening of body socket.For Convenient working personnel open baffles 1086, and folded plate portion 1088 is equipped on the baffle 1086, and manpower nail clasps institute The i.e. openable baffle 1086 in folded plate portion 1088 is stated, as shown in figure 5, the folded plate portion 1088 is placed in outside 1081 front end of shell when closure Side.

It is equipped with words identification on described two body sockets 108 and indicates that end shield connection is connected with vice screen, to prevent lead Wrong plug.

Since a body 1 is usually provided in outdoor, the structures such as the shell 1081, sliding sleeve 1083, baffle 1086 are used for First connection terminal, 1084 closed protective guarantees mutual inductor safe operation, the shell to avoid the entrance such as dust, rainwater 1081 and sliding sleeve 1083 sufficient length should be set according to mutual inductor model to guarantee protection effect, in the present embodiment, the shell Outer sleeve 1092 on body 1081, sliding sleeve 1083, baffle 1086 and terminal pin 109 is all made of the insulating materials systems such as plastics At.Do not need connecting lead wire when the utility model is mobile or installation, with guarantee it is mobile or installation go on smoothly, when test, will be last Screen lead 101 and vice screen lead 103 respectively with corresponding 108 grafting of body socket and make mutual inductor be powered realization live detection.Such as Shown in Fig. 6, the capacitance measuring tester 102 be equipped with connection terminal 11,101 other end of end shield lead be equipped with inserting terminal with it is described Connection terminal 11 is connected, this is techniques well known.

As shown in Fig. 7~8, one time body 1 is set in cabinet 2, and is equipped with the device that upper surface is in cambered surface in 2 bottom of cabinet Body seat 4, one time 1 bottom end of body is placed in the cambered surface of the body seat 4, and 1 center bottom of a body is solid by one Fixed board 3 is fixed on the bottom plate of the cabinet 2, is equipped with fixed casting portion 8 in 2 bottom of cabinet, and the body seat 4 and solid Fixed board 3 is all set in the fixed casting portion 8, is respectively equipped with P1 connection terminal column and the connecting pin P2 on the upside of the cabinet 2 Sub- column, on a body 1 two ends of side opening pass through 2 top plate of cabinet and respectively with P1 connection terminal column and P2 Connection terminal column is connected, and is set on the upside of 2 top plate of cabinet there are two watt seat 7, and as shown in figure 8,1 upside of a body Two ends be each passed through after corresponding watt of seat 7 and be correspondingly connected with terminal post and be connected, 1 upper side end of body with it is corresponding Watt seat 7 between be equipped with connection pouring layer 9.In the present embodiment, the fixed casting portion 8 and connection pouring layer 9 are casting epoxy Cooled and solidified is formed after resin.

As shown in fig. 7, the cabinet 2 of the utility model is in inverted convex, the cabinet 2 includes upper box 201 and nowel Body 202, and 202 internal diameter of the lower box is less than upper box 201, and pivot flange is equipped on the outside of 202 upper end of lower box 203, the tank wall lower end of the upper box 201 is bolted on 203 outer end of pivot flange, and fixed casting portion 8 is poured In lower box 202, guarantee 2 barycentre steadiness of cabinet, so that the support of cabinet 2 is more firm, the dismounting of cabinet 2 is also very convenient, convenient Poured with epoxy resin in lower box 202 forms fixed casting portion 8 and a body 1 is stood up, and can also reduce epoxy resin and pour Fluence reduces cost.

The working principle of the utility model are as follows:

The major insulation of the utility model uses capacitance plate cascaded structure, as long as there is sub-fraction capacitance plate to puncture, meeting Major insulation capacitance is caused to become larger, so as to cause once becoming larger to earth-current, wherein end shield 106 passes through capacitance measuring tester 102 again Ground connection, electrovolumetric analysis 102 can monitor the variation of mutual inductor major insulation capacitance by the variation of 106 electric current of end shield, such as Some capacitor of fruit mutual inductor breaks down, and operating personnel can early prepare, and repairs processing to mutual inductor.

Body socket 108 passes through route and the end shield 106 and vice screen 107 respectively there are two setting on body 1 It is corresponding to be connected, as seen in figures 3-5, the end shield lead 101 and it is equipped with terminal pin 109 with 103 end of vice screen lead, needed When testing, terminal pin 109 is inserted on corresponding body socket 108 can be realized end shield lead 101 and end shield 106 and The connection of vice screen lead 103 and vice screen 107, in addition the body socket 108 is equipped with shell 1081, sliding sleeve 1083, baffle 1086 equal safeguard structures, avoid the first connection terminal in body socket 108 exposed, guarantee equipment operational safety.

As shown in figure 9,1 bottom of a body in the prior art is usually only fixed by a fixed plate 3, when P1 connection Terminal and when the P2 connection terminal pulling force F1 and F2 of different sizes by two sides, one time body 1 is easy to happen inclination, in addition as schemed Shown in 10, tile 5 is typically provided between 1 upper side end of body and watt seat 7, the tile 5 is fixed on a watt seat by bolt 6 Certain alignment 7 center of watt seat can not be completely secured in 7, when erecting a body 1, there can be certain deviation, so that 1 unbalance stress of body, is easy to produce screen sliding phenomenon, and have certain gap between watt seat 7 and tile 5, and rainwater is also very It is easy to enter in cabinet by gap.

As shown in fig. 7, the utility model is using traditional fixed plate 3 and 4 structure of body seat simultaneously, to 2 bottom of cabinet Be poured a certain amount of epoxy resin and form fixed casting portion 8 for a body 1 to be auxiliarily fixed, accordingly even when P1 connection terminal and Even if P2 connection terminal under tension has a certain difference, body 1 will not run-off the straight, while also increasing 2 bottom of cabinet Seat intensity.In addition as shown in figure 8, the utility model casting epoxy resin in watt seat 7, which forms connection pouring layer 9, fixes a device 1 end of body had both guaranteed 1 end uniform force of a body, and there is no gaps between watt seat 7 and 1 end of body It allows rainwater to flow into cabinet 2, while also eliminating 5 structure of tile.

Claims (9)

1. the current transformer that one kind can charge actual measurement electric capacitance change, it is characterised in that: including a body (1) and cabinet (2), a body (1) is set in cabinet (2), and a body (1) includes Primary Conductor (105), end shield (106) and pair Shield (107), be enclosed with end shield (106) on the outside of the U-shaped end of the Primary Conductor (105), is enclosed on the outside of the end shield (106) Vice screen (107), and be all provided between the Primary Conductor (105) and end shield (106) and between end shield (106) and vice screen (107) Have isolated insulation layer (110), the whole outside of a body (1) is enclosed with external insulation layer (104), and the end shield (106) is logical It crosses end shield lead (101) to be connected with a capacitance measuring tester (102), and the capacitance measuring tester (102) is grounded, the vice screen (107) it is directly grounded by vice screen lead (103), sets on a body (1) and lead to respectively there are two body socket (108) Cross route it is corresponding with the end shield (106) and vice screen (107) be connected, the end shield lead (101) and with vice screen lead (103) End is equipped with terminal pin (109) and is connected with corresponding body socket (108).

2. the current transformer according to claim 1 for charging actual measurement electric capacitance change, it is characterised in that: the body Socket (108) includes shell (1081), sliding sleeve (1083) and spring (1085), and the shell (1081) is fixedly arranged on a body (1) on, plug mounting base (1082) are equipped in the shell (1081), plug mounting base (1082) front end is equipped with first and connects Connecting terminal (1084), the sliding sleeve (1083) and spring (1085) are set in shell (1081), and sliding sleeve (1083) covers On the plug mounting base (1082), spring (1085) is sheathed on the sliding sleeve (1083), the terminal pin (109) front end is equipped with second connection end sub (1091) and outer sleeve (1092), and the second connection end sub (1091) is set to institute State in outer sleeve (1092), when connection the sliding sleeve (1083) pushed by the outer sleeve (1092) move back and compress it is described Spring (1085), second connection end (1091) are connected with the first connection terminal (1084) grafting.

3. the current transformer according to claim 2 for charging actual measurement electric capacitance change, it is characterised in that: the shell (1081) front end is equipped with baffle (1086), and the baffle (1086) is articulated on shell (1081) by hinged shaft (1087), and institute Hinged shaft (1087) are stated equipped with torsional spring.

4. the current transformer according to claim 3 for charging actual measurement electric capacitance change, it is characterised in that: the baffle (1086) it is equipped with a folded plate portion (1088), and when baffle (1086) closure, the folded plate portion (1088) is placed in shell (1081) front end outer side.

5. the current transformer according to claim 1 for charging actual measurement electric capacitance change, it is characterised in that: in cabinet (2) bottom is equipped with body seat (4), and body (1) bottom end is placed on the body seat (4) and passes through a fixed plate (3) admittedly It is scheduled on cabinet (2) bottom, is equipped with fixed casting portion (8) in the cabinet (2) bottom, and the body seat (4) and fixed plate (3) It is all set in the fixed casting portion (8).

6. the current transformer according to claim 5 for charging actual measurement electric capacitance change, it is characterised in that: the body Seat (4) upper surface is in cambered surface, and one time body (1) bottom end is placed in the cambered surface.

7. the current transformer according to claim 1 for charging actual measurement electric capacitance change, it is characterised in that: in the case There are two setting on the upside of body (2) top plate watt seat (7), and two ends on the upside of a body (1) are each passed through corresponding watt of seat (7), connection pouring layer (9) is equipped between a body (1) upper side end and corresponding watt of seat (7).

8. the current transformer according to claim 7 for charging actual measurement electric capacitance change, it is characterised in that: described primary Two ends of side opening are each passed through corresponding watt of seat (7) and are connected afterwards with corresponding terminal post on body (1).

9. the current transformer according to claim 1 for charging actual measurement electric capacitance change, it is characterised in that: the cabinet It (2) include upper box (201) and lower box (202), lower box (202) internal diameter is less than upper box (201), in the nowel Pivot flange (203) are equipped on the outside of body (202) upper end, the tank wall lower end of the upper box (201) is bolted on described Pivot flange (203) outer end, fixed casting portion (8) are set to lower box (202) bottom.