2020-08-17

1. The sulfur hexafluoride gas density relay and gas density meter can accurately measure the density (or pressure) value of SF6 gas only after the SF6 equipment is withdrawn from operation and the temperature inside and outside the equipment is balanced.

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2020-07-22

SF6 circuit breaker rated gas pressure is 0.6MPa, and with high pressure (low) alarm, and high pressure (low) blocking circuit breaker action. The gas pressure will change with the temperature, in order not to affect the operation of the equipment, the current pressure gauges are equipped with temperature compensation function; Gas pressure due to temperature changes reflected on the pressure gauge is very slight. The alarm and lockout contacts are on the pressure gauge.

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2020-07-20

SF6 is a strongly electronegative gas, and its molecules are easy to adsorb free electrons and form heavy negative ions, weakening the collision ionization process in the gas, so its electrical insulation strength is very high, about 2.5 times the strength of air insulation in a uniform electric field. SF6 gas has a thermal decomposition peak at t≈2000K, so when the AC arc current crosses zero, SF6 has a much stronger cooling effect on the arc than air, and its arc extinguishing ability is about

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2020-07-20

Nitrogen (N2) is a colorless and odorless gas at room temperature and pressure. Nitrogen in the air is 78 to 80 percent. Molecular weight 28.0134, boiling point 1 195.8 ℃. Insoluble in water. When the nitrogen content in the air increases (> 84%), oxygen in the air can be excluded, causing insufficient oxygen inhalation, people feel poor breathing, and there is a sense of suffocation. High concentration of nitrogen (> 90%) can cause headache, nausea, vomiting, chest tightness, chest pain, cyano

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2020-07-16

When the SF6 gas leakage accident occurs, it can quickly deal with the accident, improve the efficiency and quality of the accident handling, establish an emergency rescue mechanism in emergency situations, ensure the safety and rapid evacuation of personnel, so as to minimize the possible injury to personnel and damage to mechanical and electrical equipment.

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2020-07-15

The working principle of SF6 leak detector mainly depends on which kind of sensor is used for detection. The sensor types of SF6 leak detector are analyzed as follows:

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