First, an overview

The device uses the microcomputer control technology, overvoltage protection technology and vacuum high voltage switch composed of a set of automatic protection system, in the neutral non effective grounding power system, can lightning, operation, and other types of resonant arc grounding overvoltage limit; by limiting the fault phase recovery voltage and recovery voltage the rate of rise, rapid elimination of the intermittent arc grounding fault, the short circuit bus PT open delta winding, eliminating the nonlinear resonance fault, this device has accurate grounding line selection function and tripping function, provide the basis for rapid fault location and troubleshooting, greatly improve the reliability and safety of the power grid operation and the power supply.

The device is a set of comprehensive protection device, a comprehensive solution to the small current system grounding problem can be widely used in China's power, metallurgy, chemical industry, coal and oil industry of 35kV and below the neutral point non effective grounding distribution network.

Two, product features

1. Comprehensive over-voltage protection function, all kinds of relative and phase and phase overvoltage are limited to low voltage level, the system insulation accidents can be greatly reduced, because the bus voltage is limited at the lower level, originally may lead to the ferroresonance over voltage possibility is greatly reduced.

2. The advanced scientific arc suppression principle, multiple means to ensure rapid elimination of arcing ground fault, and arc over voltage is limited to low voltage level, the original according to the design specification requirements should be installed to eliminate arc coil system can no longer installed, and the limit voltage of power than the installation of arc suppression coil is better and more perfect.

Two 3 small resistance harmonic elimination, fast, safe and reliable.

4 new line selection principle, the line is accurate.

5 according to the working principle of the device, it is known that the arc suppression mechanism has nothing to do with the system grounding capacitance current, does not change the operation mode of the system, no need to consider the capacity increase, which is convenient for the transformation of the power grid and the future planning.

6 occupies a small area, saving system investment, can replace the PT cabinet, for the old station transformation only need to change the PT cabinet.

More than 7 Taiwan Petersen cabinet cabinet through coordination, communication, convenient for the user to find the fault line.

8 the whole device is integrated in a high voltage switch cabinet, the structure is simple, small size, easy installation, low price, compared with the arc suppression coil grounding system, with a high performance price ratio.

9 the device has a high degree of automation, operation and maintenance is very convenient.

Three, model description

Four, technical indicators

1 working environment

Ambient temperature: -25 ~ +55;

Atmospheric pressure: 80~110Kpa;

Ambient humidity: monthly average maximum relative humidity is less than 95%, no condensation surface of the casing;

There is no corrosive gas that causes damage to metal or insulation and more severe dust and mold, and no fire and explosion dangerous substances.

2 device rating parameters

Rated frequency: 50 (Hz);

Rated voltage: 3, 6, 10, 35 (kV);

Rated current: 10, 31.5, 63, 80, 100, 125, 160, 200,, 315 (A);

Rated short circuit breaking current: 50kA.

3 intelligent controller parameters

1) supply voltage: DC/AC 220V, allow the deviation of -20%~10%;

2) power supply: <25W;

(3) communication interface: RS-485 (or RS-232);

4) equipped with line selection function, the maximum number of line 36 Road (determined according to user requirements);

6) alarm and remote output contact capacity: AC250V 2A; DC220V 0.2A;

7) zero sequence voltage start value 30V~120V, action accuracy: the error is less than 5%;

8) electromagnetic compatibility can reach the national level.

Five, ordering instructions

1 the user should provide the relevant system rated voltage, the system's maximum single phase grounding capacitive current, as the arc suppression and elimination of the cabinet design basis.

2 if the line selection function, please indicate the number of line selection.

3. The cabinet body size, after my company and the user to complete negotiations, by our company engineer design and the user signature confirmation, in order to determine the final.

4 if the user has special requirements should be put forward in order.

5 other additional accessories or spare parts shall be required to indicate the type and quantity of the goods to be ordered.