电子式互感器系列
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NUMBER:143
NAME:MP-EVT-10L electronic voltage transformer
Detailed introduction:

Detailed introduction

Use

        The MP-EVT-10L Electronic voltage transformers is suitable for use in outdoor and on-column vacuum circuit breakers in power systems with a rated frequency of 50 Hz and a rated voltage of 10 kV. The electronic sensor is used in conjunction with the electronic meter and the computer measurement and protection equipment to realize functions such as measurement, zero-sequence protection, data transmission and digital detection of live status.


pecifications:

Conditions:

Equipment maximum voltage: 12kV

Rated primary voltage: 10kV

Rated voltage ratio: 10000/√3V/6.5/3V

Accuracy level: 3P

Rated load: ≥1MΩ

Rated frequency: 50Hz

Rated insulation level: 12/42/75 kV

Partial discharge level: ≤20pC

Standards: GB/T20840.7-2007

Temperature: -40°C~+70°C

Altitude: ≤2000m

Wind pressure and speed: ≤±700Pa; 34m/s;

Atmosphere: without heavy pollution



Working principle and main features

The electronic voltage sensor works on the principle that a voltage is divided by a capacitor to obtain a small voltage signal proportional to the primary voltage.

 

Main feature::

     Direct output of small voltage signals simplifies system structure, reduces error sources, and improves the stability and accuracy of the entire system;

    It does not contain iron core, does not saturate, has wide frequency range, large measuring range, good linearity and strong anti-interference ability. It can make the protection device work reliably under system failure condition;

    When the voltage output terminal is short-circuited, no overcurrent will occur, nor ferromagnetic resonance will occur, which will eliminate the major troubles in the power system and ensure the safety of personnel and equipment.

    Moreover, it has small size, light weight, low energy consumption, and reduced ferromagnetic pollution.

 

 Installation method

     Fix the sensor to the flange with screws and connect the primary terminal to the line;

The bottom of the electronic sensor has a two-core shielded wire as a secondary output terminal, which is connected to the electronic instrument or protection device through a composite shielded cable. The cable shielding layer is grounded through the sensor grounding insert or the metal base, and the instrument or the protection device does not need to be grounded again; The electronic voltage sensor zero-sequence secondary output line is 1 (blue), 2 (brown); 1 is high potential, 2 is ground.


Packaging transportation and storage maintenance

     The product is packed in carton and has anti-shock and moisture-proof measures inside the box;

    Visual inspection shall be carried out after unpacking, and the surface shall be free from damage, deformation and cracks;

    During the life cycle of the product, no special maintenance is required, and it should be handled gently and kept away from mildew and moisture.

Other information:

The name, model number, main technical parameters and quantity of the product should be provided when ordering.

Outline drawing and installation dimensions: see the Figure below      

                        

          Figure, outline dimentions 


Office No. 3032, Building 6, No. 97 Changping Road, Shahe Town, Changping District, Beijing, (Chāngpíng shìfàn yuán).

北京市昌平区沙河镇昌平路97号6幢3032(昌平示范园)

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  • Office No. 3032, Building 6, No. 97 Changping Road, Shahe Town, Changping District, Beijing, (Chāngpíng shìfàn yuán)

    北京市昌平区沙河镇昌平路97号6幢3032(昌平示范园)

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