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Multi-section zinc oxide lightning arrester leakage current measurement apparatus

A leakage current and measuring device technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as large measurement errors and endangering the life safety of operators, and achieve accuracy, safety, and high stability Effect

Inactive Publication Date: 2015-10-07
STATE GRID CORP OF CHINA +1
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  • Claims
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Problems solved by technology

The existing measurement method has the following problems: 1. The microammeter is installed on the DC high-voltage generator, and the leakage current of the test will include the stray current of the high-voltage test lead to the surrounding air or equipment, and the measurement error is large; 2. The operating table There is a physical connection with the DC high voltage generator, once a fault occurs, the high voltage may be transmitted to the operating table through the cable, endangering the life safety of the operator

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  • Multi-section zinc oxide lightning arrester leakage current measurement apparatus
  • Multi-section zinc oxide lightning arrester leakage current measurement apparatus

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Embodiment Construction

[0018] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0019] see figure 1 , is a schematic diagram of the topological structure of a multi-section zinc oxide arrester leakage current measuring device of the present invention. A multi-section zinc oxide arrester leakage current measurement device of this preferred embodiment includes a remote control platform 5, a DC high voltage generator 4, a DC micro-ampere detection device 3 and a multi-section zinc oxide arrester 1 located on the DC high voltage generator . Among them, the remote control platform communicates with the DC high voltage generator through wireless communication, and the input terminal of the DC high...

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Abstract

The invention discloses a multi-section zinc oxide lightning arrester leakage current measurement apparatus. The apparatus comprises a remote control platform, a direct-current high-voltage generator, a direct-current microamp detection apparatus and multi-section zinc oxide lightning arresters. The remote control platform and the direct-current high-voltage generator are communicated in a wireless mode. A flange among the multi-section zinc oxide lightning arresters is fixedly connected to a wiring clamp. A physical position of the direct-current microamp detection apparatus is fixedly connected to the wiring clamp. A signal output terminal of the direct-current high-voltage generator is electrically connected to a signal input terminal of the direct-current microamp detection apparatus through a lead. The direct-current microamp detection apparatus is connected to the zinc oxide lightning arresters through the wiring clamp. By using the multi-section zinc oxide lightning arrester leakage current measurement apparatus of the invention, the direct-current microamp detection apparatus is physically fixed to the wiring clamp between the two sections of lightning arresters; a stray current of a high voltage test lead to surrounding air or equipment does not directly pass through the direct-current microamp detection apparatus so that an influence of the stray current is avoided and measurement accuracy is ensured.

Description

technical field [0001] The invention relates to a current measuring device, in particular to a leakage current measuring device of a multi-section zinc oxide arrester. Background technique [0002] Zinc oxide arrester is one of the electrical components of the substation. It is composed of non-linear zinc oxide valves and is used to prevent external lightning strikes or internal overvoltage shocks from damaging electrical equipment. In the handover or routine test, it is necessary to test the DC reference voltage of the zinc oxide arrester at the DC reference current and the leakage current measurement (microampere level) at 0.75 times the DC reference voltage. The current existing device measures the leakage current by installing a microammeter on the top of the DC high voltage generator for measurement, and the console is connected with the DC high voltage generator through a cable. The existing measurement method has the following problems: 1. The microammeter is install...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G01R31/02
Inventor 穆靖宇杨珀华超
Owner STATE GRID CORP OF CHINA
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