CN206057373U - A kind of special electric power secondary circuit short circuit p-wire - Google Patents

Abstract

The utility model relates to a special electric power secondary circuit short-circuit test line. During the electrical test, according to the needs of the test, it is often necessary to connect, change lines, etc., connect the voltage, signal and other circuits with the device, and connect the electrical circuits on the terminal block of the device, which is time-consuming and labor-intensive. The utility model is characterized in that it consists of one and only one metal connecting wire and two magnetic test plugs, the magnetic test plug includes a plug conduction joint, a magnetic ring, a plug sleeve, a conductive spring, a plug base and a limiter , the plug base is fixed on one end of the plug sleeve, the magnetic ring is fixed on the other end of the plug sleeve, the limiter is located in the plug sleeve, one end of the conductive spring is on the plug base, and the other end is on the limiter At the bottom of the , both ends of the metal connecting wire are connected to a magnetic test plug. The utility model does not need to connect test lines outside the terminal row or to be assisted by test coordinators, thereby improving work efficiency and reducing labor intensity of testers.

Description

A special power secondary circuit short circuit test line

technical field

The utility model relates to a special-purpose electric secondary circuit short-circuit test line.

Background technique

When developing, testing, testing and maintaining power and electrical secondary equipment (generator-transformer protection devices, fault recorders and excitation, etc.), power test lines are often used to add current and voltage to the terminals of the equipment, or short-circuit the terminals. At present, most of the phoenix terminal blocks (current) used by secondary equipment can be inserted with the plug of the DDC test line (mostly banana plugs) and can be in good contact, and the electrical continuity meets the test requirements. The terminal blocks for voltage, signal and partial current cannot be inserted and connected by the special plug of the test line, but need to be manually assisted by the tester or connected with the test line outside the terminal block.

During the electrical test, according to the needs of the test, frequent connections, wire changes, etc., voltage, signal and other circuits are connected to the device, and the connection between the electrical circuits on the terminal block of the device requires the cooperation of special test wiring personnel and test personnel. Time-consuming and labor-intensive, the work efficiency is relatively low.

Utility model content

The utility model aims at the troublesome problem of the short-circuit connection between the voltage terminal rows or the connection between the terminal row and the ground network, and provides a special power secondary circuit short-circuit test line with a reasonable structure design. You only need to put the magnetic test plug at one end of the short wire close to the terminal block, and the special plug for the short wire is connected to the fastening screw of the terminal block by magnetic force, so that the conductor of the plug is connected with the circuit of the terminal block. The same is true for the other end. It is necessary to connect the test line outside the terminal block or to assist the test personnel to improve work efficiency and reduce the labor intensity of the test personnel. If the test requires the circuit of the terminal block of the device to be short-circuited with the equipotential bar of the device, the casing, etc., then the other end is magnetically shorted to the equipotential grounding bar of the device, the casing, etc., so as to achieve the purpose of the test, and it is very flexible to use.

The technical scheme adopted by the utility model to solve the above-mentioned problems is: the structural feature of the special electric power secondary circuit short circuit test line is that it consists of one and only one metal connecting line and two magnetic test plugs, and the magnetic test plugs include Plug conducting joint, magnetic ring, plug sleeve, conductive spring, plug base and limiter, the plug base is fixed at one end of the plug sleeve, the magnetic ring is fixed at the other end of the plug sleeve, The limiting member is located in the plug sleeve, the diameter of the limiting member is larger than the inner diameter of the magnetic ring, the plug conducting joint is fixed on the top of the limiting member, the conductive spring is located in the plug sleeve, and the conductive One end of the spring is pressed against the plug base, and the other end of the conductive spring is pressed against the bottom of the limiter. The plug sleeve is a cylindrical structure, and the outer wall of the plug sleeve is flush with the outer wall of the magnetic ring. , the inner diameter of the plug sleeve is larger than the inner diameter of the magnetic ring, and the center lines of the plug conducting joint, the magnetic ring and the plug sleeve overlap; both ends of the metal connecting wire are respectively connected to a magnetic test plug.

Preferably, in the present invention, when the magnetic test plug is in the initial state, the stopper is pressed against the bottom of the magnetic ring under the force of the conductive spring, and the top of the plug connection joint is higher than the top of the magnetic ring.

Preferably, the magnetic ring of the present invention is made of ferromagnetic material.

As a preference, the plug base of the present invention is provided with a ring of bosses, and the distance between the top of the magnetic ring and the bosses of the plug base is 16mm.

Preferably, the plug conducting joint of the utility model is made of copper material, the plug sleeve is made of strong magnet stainless steel, and the conductive spring is made of gold-plated/copper stainless steel.

Compared with the prior art, the utility model has the following advantages and effects: the structure is simple, the use is convenient, and the magnetic test plug is selected. The plug has magnetism, and the strength of the magnetism meets the reliable connection between the plug and the fastening screws of the terminal row. The electrical connection with the fastening screws of the terminal block is reliable and meets the requirements of contact resistance. The length and diameter of the connecting copper wire are designed according to the needs of the test, and the wires of various specifications are designed. The utility model has the advantages of convenient use, safe use process, simple structure and high efficiency of test provision. When shorting the circuit between the terminal blocks or shorting the circuit between the terminal blocks and the power grid, it is only necessary to touch the magnetic test plug.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the special power secondary circuit short circuit test line in the embodiment of the utility model.

Fig. 2 is a schematic structural diagram of the magnetic test plug in the embodiment of the present invention, and the magnetic test plug is in the initial position at this time.

Fig. 3 is a schematic structural diagram of the magnetic test plug in the embodiment of the present invention, and the magnetic test plug is in the working position at this time.

Fig. 4 is a top view structural diagram between the plug conducting joint and the magnetic ring in the embodiment of the utility model.

In the figure: 1. Magnetic test plug; 2. Metal connection wire; 11. Plug conduction joint; 12. Magnetic ring; 13. Plug sleeve; 14. Conductive spring; 15. Plug base; 16. Limiting piece .

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Example.

Referring to FIG. 1 to FIG. 4 , the dedicated power secondary circuit short-circuit test line in this embodiment consists of one and only one metal connecting line 2 and two magnetic test plugs 1 .

The magnetic test plug 1 in this embodiment includes a plug conducting joint 11, a magnetic ring 12, a plug sleeve 13, a conductive spring 14, a plug base 15 and a stopper 16, and the plug base 15 is fixed on the plug sleeve 13. One end of the magnetic ring 12 is fixed on the other end of the plug sleeve 13, the stopper 16 is located in the plug sleeve 13, the diameter of the stopper 16 is larger than the inner diameter of the magnetic ring 12, and the plug conducting joint 11 is fixed at the limit On the top of the member 16, the conductive spring 14 is located in the plug sleeve 13, one end of the conductive spring 14 is pushed against the plug base 15, and the other end of the conductive spring 14 is pushed against the bottom of the limiting member 16. The plug sleeve 13 has a cylindrical structure, and the outer wall surface of the plug sleeve 13 is flush with the outer wall surface of the magnetic ring 12, which is conducive to more effective connection with the terminal block. The inner diameter of the plug sleeve 13 is larger than the inner diameter of the magnetic ring 12 , so that the magnetic ring 12 has a better resistance to the limiting member 16 and ensures that the limiting member 16 is always located in the plug sleeve 13 . The centerlines of the plug conduction joint 11 , the magnetic ring 12 and the plug sleeve 13 overlap, so that the magnetic test plug 1 can be connected to the terminal block more stably and firmly, and the force is more uniform. Both ends of the metal connecting wire 2 are respectively connected with a magnetic test plug 1 .

In this embodiment, when the magnetic test plug 1 is in the initial state, the stopper 16 is pressed against the bottom of the magnetic ring 12 under the force of the conductive spring 14, and the top of the plug conducting joint 11 is higher than the top of the magnetic ring 12 . One end of the conductive spring 14 is fixed on the plug base 15 . The magnetic ring 12 is made of ferromagnetic material. The upper part of the plug conducting joint 11 has a hemispherical structure, and the lower part of the plug conducting joint 11 has a cylindrical structure. The outer diameter G of the magnetic ring 12 is 4 mm, and the diameter g of the plug lead-through joint 11 is 2 mm. The plug base 15 is provided with a ring of bosses, and the distance H between the top of the magnetic ring 12 and the bosses of the plug base 15 is 16mm. The plug conducting joint 11 is made of copper, the plug sleeve 13 is made of strong magnet stainless steel, and the conductive spring 14 is made of gold-plated/copper stainless steel.

The steps of the test method of the magnetic test plug 1 in the present embodiment are as follows: the diameter of the magnetic test plug 1 is smaller than the inner diameter of the terminal block, the magnetic test plug 1 is inserted into the terminal row hole, and the magnetic ring 12 relies on magnetic force to connect the magnetic ring 12 with the terminal block. The fastening screws of the terminal block are sucked together, and the plug conducting joint 11 is reliably connected to the terminal block fastening screw due to the magnetic force and the action of the conductive spring 14, so that the internal circuit of the terminal block is in harmony with the magnetic The external circuit connected to the test plug 1 is conducted, which improves the test efficiency.

Both ends of the special power secondary circuit short-circuit test line are equipped with a magnetic test plug 1, which can be connected with the fastening screw of the terminal block, the casing of the device or the equipotential grounding bar of the device by means of the magnetic test plug 1 to achieve simple connection , Improve test efficiency and reduce labor intensity. Select the magnetic test plug 1, which has a magnetic connection, and the conduction capacity of the electrical circuit meets the test requirements. Metal connecting wires 2 of different lengths, diameters, and materials are configured according to test requirements to realize short-circuit test wires of different specifications.

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field of the utility model can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or go beyond the scope defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (5)

1. A special-purpose power secondary circuit short-circuit test line, characterized in that: it is composed of and only one metal connecting line and two magnetic test plugs, and the magnetic test plug includes a plug conduction joint, a magnetic ring, and a plug cover tube, a conductive spring, a plug base and a stopper, the plug base is fixed at one end of the plug sleeve, the magnetic ring is fixed at the other end of the plug sleeve, and the stopper is located in the plug sleeve, The diameter of the limiting member is larger than the inner diameter of the magnetic ring, the plug conducting joint is fixed on the top of the limiting member, the conductive spring is located in the plug sleeve, and one end of the conductive spring is supported on the plug base, The other end of the conductive spring is pushed against the bottom of the stopper, the plug sleeve is a cylindrical structure, the outer wall of the plug sleeve is flush with the outer wall of the magnetic ring, and the inner diameter of the plug sleeve is larger than the magnetic ring. The inner diameter of the ring, the center line of the plug conducting joint, the magnetic ring and the plug sleeve overlap; the two ends of the metal connecting wire are respectively connected with a magnetic test plug. 2. The special power secondary circuit short-circuit test line according to claim 1, characterized in that: when the magnetic test plug is in the initial state, the limiter is pressed against the magnetic ring under the force of the conductive spring. Bottom, the top of the plug lead-through connector is higher than the top of the magnetic ring. 3. The special power secondary circuit short-circuit test line according to claim 1, characterized in that: the magnetic ring is made of strong magnetic material. 4. The special power secondary circuit short-circuit test line according to claim 1, characterized in that: the plug base is provided with a ring of bosses, and the distance between the top of the magnetic ring and the bosses of the plug base is The distance is 16mm. 5. The special power secondary circuit short circuit test line according to claim 1, characterized in that: the plug conducting joint is made of copper material, the plug sleeve is made of strong magnetic stainless steel, and the conductive spring Gold/copper plated stainless steel.