CN214623013U

CN214623013U - PT secondary pressure drop and load tester

Info

Publication number: CN214623013U
Application number: CN202120646662.1U
Authority: CN
Inventors: 赵荣青; 王贵宝
Original assignee: Shijiazhuang Rongwei Electronic Technology Co ltd
Current assignee: Shijiazhuang Rongwei Electronic Technology Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-11-05
Anticipated expiration: 2031-03-30

Abstract

The utility model provides a PT secondary voltage drop and load tester, belonging to the technical field of electric power measuring equipment, comprising a detection device for receiving voltage signals of a PT secondary side and one side of an electric energy meter; the cable is wound on the wire trolley; one end of the lead is connected with the detection device, and the other end of the lead is connected with a terminal box electrically connected with a PT secondary side metering voltage terminal; the clip comprises a first clip body, a second clip body hinged on the first clip body and an elastic piece: the two clamping blocks are respectively connected to the inner sides of the first clamping head and the second clamping head, the inner sides of the clamping blocks are provided with conical surfaces, and the two conical surfaces form clamping parts used for clamping bolt heads of the electric energy meter and the PT. The utility model provides a PT secondary pressure drop and load tester, clip are under the effect of elastic component, and on the bolt head of the online nose of centre gripping, the lower part space of bolt head was blocked to the less one end of conical surface size, has guaranteed that the centre gripping is stable difficult for deviating from, makes test data stable.

Description

PT secondary pressure drop and load tester

Technical Field

The utility model belongs to the technical field of the electric power test, specifically speaking are PT secondary pressure drop and load tester.

Background

In factory charging, secondary voltage drop on the PT side is a main factor causing less charging of an energy meter, and workers need to frequently compare voltages on the PT side and the electric energy meter side to reduce the voltage within a qualified range. At secondary pressure measurement in-process, often need to carry out the terminal wiring to PT side outage, but actual conditions often do not allow operation like this, can influence continuous production to secondary side disconnection can be more troublesome, and the screw is not screwed up just to have the wire virtual phenomenon of connecing and lead to measuring inaccurate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PT secondary pressure drop and load tester aims at solving the technical problem that PT secondary side wiring process is loaded down with trivial details and connect virtual easily.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a PT secondary pressure drop and load tester, includes:

the detection device is used for receiving voltage signals of a PT secondary side and one side of the electric energy meter;

the winding trolley is wound with a cable, one end of the cable is connected to the detection device, and the other end of the cable is connected to a terminal strip connected with the electric energy meter;

one end of the lead is connected to the detection device, and the other end of the lead is connected to a terminal box electrically connected with a PT secondary side metering voltage terminal;

the other ends of the cable and the wire are respectively and electrically connected to the electric energy meter and the PT through the clamp, the clamp comprises a first clamp body, a second clamp body hinged to the first clamp body and an elastic piece arranged between the first clamp body and the second clamp body, the first clamp body comprises a first clamp handle and a first chuck, the second clamp body comprises a second clamp handle and a second chuck, and the first clamp handle or the second clamp handle is used for electrically connecting the cable or the wire; the elastic piece is used for driving the first chuck and the second chuck to approach each other by pushing the first clamp handle and the second clamp handle to move away from each other:

the clamping blocks are respectively connected to the inner sides of the first chuck and the second chuck, the inner sides of the clamping blocks are provided with conical surfaces, and the two conical surfaces form clamping parts used for clamping bolt heads of the electric energy meter and the PT.

As another embodiment of the application, the materials of the first clamp body, the second clamp body and the clamp block are all pure copper or copper-chromium alloy.

As another embodiment of this application, the elastic component is the cover establish first clamp with the epaxial torsional spring of second clamp pivot.

As another embodiment of the present application, the elastic member is a compression spring disposed between the first clamp holder and the second clamp holder.

As another embodiment of the present application, the clamping block is connected to the first clamping head and the second clamping head by bolts.

As another embodiment of the present application, the clamping blocks are welded to the first and second clamps, respectively.

As another embodiment of the present application, the first clip handle and the second clip handle are respectively connected to the wire nose by bolts.

As another embodiment of the present application, the first clamp holder or the second clamp holder is welded to the wire and the cable, respectively.

As another embodiment of this application, the mixing chamber inner wall is to the arcwall face of discharge gate shrink.

The utility model provides a PT secondary pressure drop and load tester's beneficial effect lies in: connecting one side of a cable on the winding vehicle into the detection device, and connecting the other side of the cable on the winding vehicle to a corresponding voltage terminal of the electric energy meter through a clamp; one end of a lead is connected into the detection device, and the other end of the lead is connected to a voltage terminal of the PT secondary side through a clamp; the clamp is divided into a first clamp body and a second clamp body, the first clamp body is provided with a first clamp handle and a first clamp head, and the second clamp body is provided with a second clamp handle and a second clamp head; the elastic piece is located between first clamp holder and the second clamp holder, is equipped with the clamp splice of conical surface on first chuck and the second chuck respectively, and the less one end of two conical surface sizes is under the effort of elastic piece with the voltage terminal nut of PT side and the voltage terminal nut of electric energy meter step up, makes the clip electricity connect stably, does not deviate from easily.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic wiring diagram of a PT secondary voltage drop and load tester provided in an embodiment of the present invention;

fig. 2 is a schematic view of the operation of the clamp of the PT secondary voltage drop and load tester provided in the embodiment of the present invention;

fig. 3 is a perspective view of the clamp of the PT secondary voltage drop and load tester provided by the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100. a detection device; 200. winding vehicles; 210. a cable; 220. a wire; 300. an electric energy meter; 400. PT; 500. a clip; 510. a first clamp body; 511. a first clamp handle; 512. a first chuck; 520. a second clip body; 521. a second clamp handle; 522. a second chuck; 600. an elastic member; 700. a clamping block; 710. a conical surface; 800. and a wire nose.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3, a PT secondary voltage drop and load tester according to the present invention will now be described. The PT secondary voltage drop and load tester comprises a detection device 100, a voltage detection unit and a load detection unit, wherein the detection device is used for receiving voltage signals of a PT400 secondary side and an electric energy meter 300 side; a cable 210 is wound on the winding vehicle 200, one end of the cable 210 is connected to the detection device 100, and the other end of the cable 210 is connected to a terminal block connected with the electric energy meter 300; one end of the lead 220 is connected to the detection device 100, and the other end is connected to a terminal box electrically connected with a secondary side metering voltage terminal of the PT 400; the other ends of the cable 210 and the wire 220 are electrically connected to the electric energy meter 300 and the PT400 through the clamp 500, respectively, the clamp 500 includes a first clamp body 510, a second clamp body 520 hinged to the first clamp body 510, and an elastic member 600 disposed between the first clamp body 510 and the second clamp body 520, the first clamp body 510 includes a first clamp handle 511 and a first clamp 512, the second clamp body 520 includes a second clamp handle 521 and a second clamp head 522, and the first clamp handle 511 or the second clamp handle 521 is used for electrically connecting the cable 210 or the wire 220; the elastic member 600 is used for driving the first collet 512 and the second collet 522 to approach each other by pushing the first collet 511 and the second collet 521 away from each other: the two clamping blocks 700 are respectively connected to the inner sides of the first and

second clamps

512 and 522, the inner sides of the clamping blocks 700 are provided with tapered surfaces 710, and the two tapered surfaces 710 form clamping portions for clamping bolt heads of the electric energy meter 300 and the PT 400.

Compared with the prior art, the PT secondary voltage drop and load tester provided by the utility model has the advantages that one side of the cable 210 on the winding vehicle 200 is connected to the detection device 100, and the other side is connected to the corresponding voltage terminal of the electric energy meter 300 through the clamp 500; one end of a lead 220 is connected to the detection device 100, and the other end of the lead is connected to a voltage terminal on the secondary side of the PT400 through a clamp 500; the clamp 500 is divided into a first clamp body 510 and a second clamp body 520, wherein the first clamp body 510 is provided with a first clamp handle 511 and a first clamping head 512, and the second clamp body 520 is provided with a second clamp handle 521 and a second clamping head 522; the elastic member 600 is located between the first clamping handle 511 and the second clamping handle 521, the clamping blocks 700 with tapered surfaces 710 are respectively arranged on the first clamping head 512 and the second clamping head 522, and the smaller size ends of the two tapered surfaces 710 clamp the voltage terminal nut on the PT400 side and the voltage terminal nut of the electric energy meter 300 under the action force of the elastic member 600, so that the clamp 500 is electrically connected stably and is not easy to be disengaged.

Referring to fig. 1 and 2, as a specific embodiment of the PT secondary pressure drop and load tester provided by the present invention, the materials of the first clamp 510, the second clamp 520 and the clamp block 700 are pure copper or copper-chromium alloy.

In the embodiment, the pure copper alloy has good conductivity, and can effectively avoid pressure drop. The copper-chromium alloy can ensure good conductivity, increase wear resistance and strength, and ensure service life.

As another example, the first collet 510, the second collet 520, and the clamp block 700 may be made of an aluminum alloy.

Referring to fig. 2, as a specific embodiment of the PT secondary voltage drop and load tester provided by the present invention, the elastic member 600 is a torsion spring sleeved on the rotating shafts of the first clamp 510 and the second clamp 520.

In this embodiment, the torsion spring pushes the first clamp body 510 and the second clamp body 520 away from each other to drive the first collet 512 and the second collet 522 to abut against each other. The elastic member 600 is a compression spring.

Referring to fig. 2, as an embodiment of the PT secondary pressure drop and load tester of the present invention, the elastic member 600 is a compression spring disposed between the first clamp handle 511 and the second clamp handle 521.

In this embodiment, the compression spring pushes the first clamp body 510 and the second clamp body 520 away from each other to drive the first collet 512 and the second collet 522 to abut against each other.

In this embodiment, the axis of the tapered surface 710 is parallel to the length direction of the clip 500, so that the end of the clip 500 can directly clamp the screws, thereby facilitating the clamping of a plurality of screws side by side and reducing the occupied space of the clip 500.

In this embodiment, the clamp 500 may be used to tighten the screw laterally across the tapered surface 710 of the clamp block 700, making the operation of the clamp 500 more flexible.

In this embodiment, the clamp 500 is clamped on the bolt head under the action of the elastic member 600, and the smaller end of the tapered surface 710 blocks the lower gap of the bolt head, so that the clamping is stable and is not easy to disengage, and the test data is stable.

Referring to fig. 1, as an embodiment of the PT secondary voltage drop and load tester of the present invention, two clamping blocks 700 are respectively connected to the first clamping head 512 and the second clamping head 522 by bolts.

In this embodiment, the bolted connection mode is convenient for carry out the change and the maintenance of circuit, swiftly handles the trouble that produces in the use.

Referring to fig. 2, as an embodiment of the PT secondary voltage drop and load tester of the present invention, two clamping blocks 700 are welded to the first clamping head 512 and the second clamping head 522, respectively.

In this embodiment, the welding mode can guarantee the connection effect between the two and reduce contact resistance, reduces the voltage drop of secondary circuit, improves measurement accuracy.

In this embodiment, the cable 210 and the lead 220 are connected to the wire nose 800 by crimping, and then the wire nose 800 is connected to the clip 500, which facilitates the replacement and maintenance of the wire and quickly handles the fault generated during the use.

Referring to fig. 2, as a specific embodiment of the PT secondary pressure drop and load tester of the present invention, the first clamp handle 511 and the second clamp handle 521 are respectively connected to the wire nose 800 through bolts.

In this embodiment, the end of the wire nose 800 is provided with a connecting hole, the first clamp handle 511 and the second clamp handle 521 are respectively provided with an opening, and a bolt passes through the two holes to firmly connect the wire nose 800 with the first clamp handle 511 and the second clamp handle 521 respectively

Referring to fig. 2, as an embodiment of the PT secondary voltage drop and load tester of the present invention, the first clamp handle 511 or the second clamp handle 521 is respectively connected to the conducting wire 220 and the cable 210.

In this embodiment, the wire 220 and the cable 210 are welded to the clip 500, which can ensure the reliability of the electrical connection, reduce the loop resistance of the wire 220, and improve the accuracy of the measurement.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a PT secondary pressure drop and load tester which characterized in that includes:

2. The PT secondary pressure drop and load tester of claim 1 wherein the first collet, the second collet and the clamp block are all pure copper or a copper chromium alloy.

3. The PT secondary pressure drop and load tester of claim 1, wherein the resilient member is a torsion spring disposed about the pivot of the first collet and the second collet.

4. The PT secondary pressure drop and load tester of claim 1 wherein the resilient member is a compression spring disposed between the first clamp holder and the second clamp holder.

5. The PT secondary pressure drop and load tester of claim 1 wherein the clamp block is bolted to the first and second clamps respectively.

6. The PT secondary pressure drop and load tester of claim 1 wherein the clamp blocks are welded to the first and second clamps, respectively.

7. The PT secondary pressure drop and load tester of claim 1 wherein the first clamp holder and the second clamp holder are each bolted to a wire nose.

8. The PT secondary pressure drop and load tester of claim 1 wherein the first clamp holder or the second clamp holder is welded to the wire and the cable, respectively.