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A new telescopic low-voltage clamp ammeter

A clamp-type ammeter and telescopic technology, applied in the direction of measuring current/voltage, measuring electrical variables, instruments, etc., can solve the problems of insecurity and low test efficiency, and achieve convenient operation, easy reading and recording, and easy portability. Effect

Active Publication Date: 2017-04-19
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring the current, due to the high installation position of low-voltage wires, distribution transformers and other equipment, it is necessary for the tester to hold a clamp ammeter after ascending the height to measure, the test efficiency is low, and it is not safe to be in close contact with live parts

Method used

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  • A new telescopic low-voltage clamp ammeter
  • A new telescopic low-voltage clamp ammeter
  • A new telescopic low-voltage clamp ammeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Example: Combine Figure 1-3 , the telescopic low-voltage clamp ammeter of this embodiment includes: a housing and an insulating telescopic rod 3 fixedly connected to the bottom of the housing, a data display 4 is provided at the bottom of the telescopic rod, and the data display 4 passes through the telescopic rod. The connecting wires are connected to the feed-through current transformers arranged in the casing.

[0022] The housing is a closed annular body composed of a fixed housing 2 and a rotating housing 1 hinged on the fixed housing. A rotating coil 8 is fixed on the rotating housing 1. Under normal conditions, the fixed coil 7 and the rotating coil 8 form a closed loop coil, and the closed loop coil constitutes the core-through current transformer.

[0023] The fixed housing 2 and the fixed coil 7 are generally in a U-shaped structure. The horizontal bar-type rotating housing 1 and the fixed housing 2 are hinged with a pin shaft, and a torsion spring 6 is arra...

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Abstract

The invention discloses a novel telescopic type tong-type ammeter. The tong-type ammeter comprises a shell and an insulation telescopic rod fixedly connected with the bottom of the shell, a data display instrument is arranged at the bottom of the telescopic rod, the data display instrument is connected with a straight-through current transformer in the shell through a connecting wire inside the telescopic rod, the shell is a closed annular body composed of a fixed shell body and a rotating shell body hinged to the fixed shell body, the fixed shell body is fixedly connected with the telescopic rod, a fixed coil is fixedly arranged on the inner wall of the fixed shell body, a rotating coil is fixedly arranged on the rotating shell body, and under the normal state, a closed annular coil is composed of the fixed coil and the rotating coil. The novel telescopic type tong-type ammeter is suitable for measuring load currents on the low-voltage side and a branch circuit of a transformer of a distribution transformation table area, and is safe, efficient and convenient to use.

Description

[0001] Technical field: [0002] The invention relates to a novel telescopic low-voltage clamp ammeter, which is mainly used for measuring the load current of the low-voltage side of a transformer in a distribution transformer area and branch lines. [0003] Background technique: [0004] The current at the low-voltage side of the distribution transformer affects the quality of power supply and the service life of the transformer. Excessive long-term current will shorten the service life of the transformer, make the voltage drop at the end of the line in the station area too large, and the power supply voltage does not meet the requirements. Due to equipment failure, bad weather and other reasons, the current of the low-voltage side of the transformer collected by the power consumption information collection system is abnormal, and it is necessary to go to the site to make up for it. At present, the common measurement tool in the market is the clamp ammeter, which does not need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R1/04
Inventor 高书勇汪雯珺戴芳刘洋洋于同飞周俊
Owner STATE GRID CORP OF CHINA
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