Single-phase electric energy meter wire holder and installation method thereof

Abstract

The invention relates to a single-phase electric energy meter wire holder and an installation method thereof.The wire holder comprises a wire holder shell, a secondary pressing rubber head nut is arranged above the wire holder shell, and a rubber head long screw is arranged in the secondary pressing rubber head nut in a matched mode; a phase line inlet wiring terminal, a phase line outlet wiring terminal and a zero line inlet wiring terminal are arranged on the front face of the wire holder shell, a weak current wiring terminal is further arranged on the front face of the wire holder shell, and a phase line inlet binding post, a phase line outlet binding post and a zero line inlet binding post are arranged at the bottom of the wire holder shell. And the bottom of the wire holder shell is also provided with a limiting guide and weak current binding post. According to the invention, checking personnel do not need to hold a clamp to clamp strong current, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of power facility technology, and in particular to a single-phase electricity meter terminal block and its installation method. Background Technology

[0002] When power supply metering departments conduct on-site verification of single-phase electricity meters, the calibrator must be connected to the single-phase electricity meter while it is powered on. The commonly used method is: without disconnecting the power to the single-phase electricity meter, one end of the test lead is connected to the calibrator, and the other end is a common alligator clip used to clamp the high-voltage and low-voltage screws of the single-phase electricity meter. This method presents two problems: 1. There is a risk of short circuit between the live and neutral wires; 2. With multiple high-voltage and low-voltage wires (voltage, pulse, 485, clock pulse, etc.), incorrect clamping may occur; 3. New employees are not proficient, leading to low efficiency. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a single-phase energy meter terminal block and its installation method, which can enable the safe, simple and quick connection of the single-phase energy meter and the calibrator using the single-phase terminal block without power interruption during on-site calibration of the single-phase energy meter.

[0004] The present invention is achieved by the following technical solution: a single-phase energy meter terminal block, comprising a terminal block housing, a secondary clamping rubber head nut provided on the top of the terminal block housing, a rubber head long screw provided inside the secondary clamping rubber head nut, a phase wire in terminal, a phase wire out terminal and a neutral wire in terminal provided on the front of the terminal block housing, a low-voltage terminal provided on the front of the terminal block housing, a phase wire in post, a phase wire out post and a neutral wire in post provided on the bottom of the terminal block housing, and a limit guide and a low-voltage post provided on the bottom of the terminal block housing.

[0005] The terminal block housing contains a fuse and a safety partition. In the event of a short circuit, the fuse will disconnect the circuit to protect operational safety, and the safety partition will isolate the wiring of each phase of the high-voltage power supply.

[0006] The limiting guide includes a left limiting guide and a right limiting guide for the terminal block. The left limiting guide and the right limiting guide for the terminal block enable the terminal block to be quickly and smoothly aligned with the various strong and weak current contacts of the single-phase energy meter.

[0007] The left and right sides of the terminal block housing are provided with left and right side guides at the rear position, and the back of the terminal block housing is provided with a rear side guide. The left and right side guides and the rear side guide are used to realize the vertical connection between the terminal block and the energy meter.

[0008] Anti-slip strips are also provided on the left and right sides of the terminal block housing.

[0009] A single-phase electric energy meter terminal block mounting method, comprising the following steps:

[0010] Hold the terminal block shell, pinch the anti-slip strip of the terminal block shell with fingers, align the single-phase electric energy meter, and press down vertically against the lower wiring position of the single-phase electric energy meter with the left and right side guides and the rear side guide of the shell;

[0011] Use the left and right limiting guides of the terminal block to quickly and smoothly align the strong and weak electrical contact connections of the single-phase electric energy meter;

[0012] Press and shake the rubber head long screw, the rubber head long screw is guided to slide into the nut at the corresponding position of the single-phase electric energy meter, and the rubber head long screw is screwed clockwise, the terminal block and the electric energy meter are connected together in a semi-solid state;

[0013] Then, secondary compression is carried out, the secondary compression rubber nut is twisted by hand, the terminal block is slowly compressed, and the bottom of the terminal block is in complete contact with the electric energy meter, indicating that the compression is in place;

[0014] The strong and weak electrical terminals are connected to the matching test instrument with corresponding test lines, and the single-phase electric energy meter can be tested and verified.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] The single-phase electric energy meter field verification terminal base replaces the field clamps with elastic terminal posts for voltage sampling, electric energy pulse, clock pulse, and 485 interface wiring; the present calibration personnel do not need to hold the clamps to clamp the strong current, improving safety; the terminal posts and the metering terminal posts correspond one by one and will never be clamped incorrectly; one-time compression is enough, eliminating the steps of clamping voltage, clamping pulse, 485, etc., and improving efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a schematic diagram of the overall structure of the present application;

[0018] Fig. 2 It is a schematic diagram of the bottom structure of the present application;

[0019] Fig. 3 It is a schematic diagram of the internal structure of the present application. DETAILED DESCRIPTION

[0020] In the following, the present application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined arbitrarily to form new embodiments without conflict.

[0021] Embodiment:

[0022] Please combine Figs. 1-3The single-phase electric energy meter terminal block of the embodiment comprises a terminal block shell 1, a secondary compression rubber head nut 3 arranged above the terminal block shell 1, a rubber head long screw 2 arranged in the secondary compression rubber head nut 3, a phase line in terminal 4, a phase line out terminal 5 and a zero line in terminal 6 arranged on the front of the terminal block shell 1, a weak current terminal 10 also arranged on the front of the terminal block shell 1, a phase line in terminal post 7, a phase line out terminal post 8 and a zero line in terminal post 9 arranged at the bottom of the terminal block shell 1, and a limiting guide and a weak current terminal post 12 also arranged at the bottom of the terminal block shell 1.

[0023] The inside of the terminal block shell 1 is connected with a fuse tube 13 and a safety partition 14, the fuse tube 13 will disconnect the circuit to protect the operation safety when short circuit occurs, and the safety partition 14 separates the connection of each phase of strong current.

[0024] The limiting guide comprises a terminal block left limiting guide 11a and a terminal block right limiting guide 11b, which make the terminal block quickly and smoothly align with each strong and weak current contact electric connection of the single-phase electric energy meter.

[0025] The left and right side of the terminal block shell 1 is provided with a shell left and right side guide 1a, and the back of the terminal block shell 1 is provided with a shell back side guide 1c, which are used to realize the vertical connection of the terminal block and the electric energy meter.

[0026] The left and right side of the terminal block shell 1 is also provided with an anti-skid strip 1b.

[0027] The terminal block shell of the single-phase electric energy meter is made of insulating material, when the single-phase electric energy meter terminal block is used, first hold the terminal block shell 1 with the right hand, pinch the shell left and right anti-skid strips 1b with fingers, align the single-phase electric energy meter in the middle, and press vertically against the lower connection position of the single-phase electric energy meter with the shell left and right side guide 1a and the shell back side guide 1c. The terminal block left limiting guide 11a and the terminal block right limiting guide 11b can make the terminal block quickly and smoothly align with each strong and weak current contact electric connection of the single-phase electric energy meter. Then press with the left hand, and shake the rubber head long screw 2 with the right hand, feel the screw guide 2a sliding into the nut corresponding to the position of the single-phase electric energy meter, then turn the rubber head long screw 2 clockwise for 6-10 turns, at this time the rubber head long screw 2 is screwed into the nut for 5-8 mm deep, the terminal block and the electric energy meter are connected together in a semi-firm state, but the terminal block will not fall off, and the hand can be released. The rebound force of the spring of the phase line in terminal post 7, the phase line out terminal post 8, the zero line in terminal post 9 and the weak current terminal post 12 and the rubber head long screw 2 form a semi-clamping structure.

[0028] If the electric energy meter is high in position, it is difficult to press the operation, or the operator is small in strength, it is difficult to press down, so the secondary compression structure is specially designed, the first time is only to press the half with small force, and then the secondary compression structure is pressed tightly and firmly.

[0029] Then the secondary compression is carried out. The second compression glue head nut 3 is twisted by hand, the terminal block is slowly compressed, and the bottom of the terminal block and the electric energy meter are in complete contact, which indicates that the compression is in place.

[0030] Finally, the strong current wiring terminal: phase-in terminal 4, phase-out terminal 5, zero-in terminal 6, and weak current wiring terminal: weak current wiring terminal 10 are respectively connected to the corresponding test instrument, and the single-phase electric energy meter can be tested and checked.

[0031] In order to prevent the test line from being inserted into the wrong position and short-circuited, the fuse 13 is connected in the terminal block, which will break the circuit to protect the operation safety when short-circuit occurs. The safety partition plate 14 is arranged in the terminal block, which separates the wiring of each phase of strong current, so that even if the wiring of a certain phase of strong current is aged and falls off, it will not roll to other positions to cause short-circuit, thereby protecting the operation safety.

[0032] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A single-phase electric energy meter terminal block, characterized in that, Including the terminal block shell (1), the upper part of the terminal block shell (1) is provided with a secondary compression rubber head nut (3), the secondary compression rubber head nut (3) is matched with a rubber head long screw (2), the front of the terminal block shell (1) is provided with a phase line in terminal (4), a phase line out terminal (5) and a zero line in terminal (6), the front of the terminal block shell (1) is also provided with a weak current terminal (10), the bottom of the terminal block shell (1) is provided with a phase line in terminal post (7), a phase line out terminal post (8) and a zero line in terminal post (9), the bottom of the terminal block shell (1) is also provided with a limit guide and a weak current terminal post (12).

2. A single-phase electric energy meter terminal block as claimed in claim 1, characterized in that, The fuse tube (13) and the safety partition (14) are connected inside the terminal block shell (1), when short circuit occurs, the fuse tube (13) will disconnect the circuit to protect the operation safety, and the safety partition (14) separates the strong current connection of each phase of electricity.

3. A single-phase electric energy meter terminal block as claimed in claim 1, characterized in that, The limit guide includes a terminal block left limit guide (11a) and a terminal block right limit guide (11b), the terminal block left limit guide (11a) and the terminal block right limit guide (11b) make the terminal block quickly and smoothly align with each strong and weak current contact electric connection of the single-phase electric energy meter.

4. A single-phase electric energy meter terminal block as claimed in claim 1, characterized in that, The left and right side edges of the terminal block shell (1) are provided with shell left and right side edge guides (1a), the back of the terminal block shell (1) is provided with a shell back side edge guide (1c), the shell left and right side edge guides (1a) and the shell back side edge guide (1c) are used to realize the vertical connection of the terminal block and the electric energy meter.

5. A single-phase electric energy meter terminal block as claimed in claim 1, characterized in that, The left and right side edges of the terminal block shell (1) are also provided with anti-skid strips (1b).

6. A method of installing a single-phase electricity meter terminal block, characterized by, The steps include: Hold the terminal block shell (1), pinch the anti-skid strips (1b) of the terminal block shell (1) with fingers, align the single-phase electric energy meter, and press vertically against the lower connection position of the single-phase electric energy meter with the shell left and right side edge guides (1a) and the shell back side edge guide (1c); Use the terminal block left limit guide (11a) and the terminal block right limit guide (11b) to make the terminal block quickly and smoothly align with each strong and weak current contact electric connection of the single-phase electric energy meter; Press and shake the rubber head long screw (2) at the same time, the screw guide slides into the nut of the corresponding position of the single-phase electric energy meter, and the rubber head long screw (2) is screwed clockwise, the terminal block and the electric energy meter are connected together in a semi-solid state; Then, secondary compression is carried out, the secondary compression rubber head nut (3) is twisted by hand, the terminal block is slowly compressed, and the complete contact between the bottom of the terminal block and the electric energy meter indicates that the compression is in place; The strong current terminal and the weak current terminal are respectively connected to the corresponding test instrument, and the single-phase electric energy meter can be tested and verified.

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