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Mutual inductor type three-phase electric energy meter capable of preventing short-circuit current electricity stealing

A technology of three-phase electric energy meters and transformers, which is applied in the direction of instruments, measuring electric variables, measuring devices, etc., can solve problems such as electric energy loss, and achieve the effect of avoiding electric energy loss and short circuit

Pending Publication Date: 2020-12-15
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, it can be seen that the existing transformer-type three-phase electric energy meter has a great hidden danger of electricity theft, resulting in the loss of electric energy

Method used

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  • Mutual inductor type three-phase electric energy meter capable of preventing short-circuit current electricity stealing
  • Mutual inductor type three-phase electric energy meter capable of preventing short-circuit current electricity stealing
  • Mutual inductor type three-phase electric energy meter capable of preventing short-circuit current electricity stealing

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 with 2 As shown, a transformer-type three-phase electric energy meter that can prevent short-circuit current stealing electricity includes a meter body 1, and the meter body 1 is provided with a voltage terminal 3, a neutral line terminal 4 and a current terminal 5. The bottom of the meter body is provided with a connection box 2, and the connection box 2 is provided with a voltage terminal 3 and a neutral line terminal 4; the right side of the connection box 2 is provided with a current terminal 5, and the current terminal 5 is "clamp-like" .

[0033] The current terminal 5 adopts movable clamp structure; the current terminal 5 is connected with a feed-through current transformer, and the feed-through current transformer is located inside the meter body 1; the current wire of the current terminal 5 is a primary coil.

[0034] The current terminal 5 includes an A phase, a B phase and a C phase.

[0035] The voltage terminal 3 includes phase A, phase ...

Embodiment 2

[0038] The biggest difference between this embodiment and the above-mentioned embodiment is that the above-mentioned embodiment is a three-phase four-wire electric energy meter, and this embodiment is a three-phase three-wire electric energy meter, such as image 3 As shown, the current terminal 5 includes phase A and phase C, and the current position of the neutral terminal of the three-phase three-wire electric energy meter and the current position of phase B are left blank.

[0039] The current sampling element of the electric energy meter adopts a core-through current transformer, and the current wire of the core-through clamp terminal is a primary coil. Designed as a clamp terminal structure, the current wire does not need to be stripped and then connected when installing the meter, and can be directly passed through the clamp terminal (such as Figure 4 As shown), to avoid the gap between the wire and the edge of the terminal hole due to the diameter of the current wire ...

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Abstract

The invention discloses a mutual inductor type three-phase electric energy meter capable of preventing short-circuit current electricity stealing, which belongs to the technical field of mutual inductor type three-phase electric energy meters and comprises a meter body, wherein a voltage terminal, a neutral line terminal and a current terminal are arranged on the meter body, a connecting box is arranged at the bottom of the meter body, and the voltage terminal and the neutral line terminal are arranged in the connecting box; and a current terminal is arranged on the right side of the connecting box and is in a clamp shape. The mutual inductor type three-phase electric energy meter is specially designed for preventing short-circuit current electricity stealing, the meter tail terminal of the mutual inductor type three-phase electric energy meter is creatively redesigned according to the scheme, the situation that a gap exists between a current wire and the edge of a terminal hole and isshort-circuited by other thin wires is avoided, a current loop does not pass through a combined junction box any more, short circuit of current connecting pieces of the combined junction box is avoided, and the purpose of electricity stealing prevention is achieved.

Description

technical field [0001] The invention relates to the technical field of a three-phase electric energy meter through a transformer, in particular to a three-phase electric energy meter through a transformer that can prevent short-circuit current from stealing electricity. Background technique [0002] The existing transformer-type three-phase electric energy meter measures the voltage and current values ​​through the voltage and current sampling components, and uses the data processing unit to reflect the product of the average power and time within a certain period of time, so as to realize the consumption of the metering load within a certain period of time. of electric energy. [0003] At present, the meter tail terminal of the transformer-type three-phase electric energy meter generally adopts the terminal hole insertion mode. After the voltage and current wires are stripped to an appropriate length, they are inserted into the meter tail terminal hole and tightened with em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/04G01R11/24
CPCG01R11/04G01R11/24
Inventor 王建宇常彦超夏文强范志毅孙发运张涌赵东明于敬波
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY