Due to the wide application of high-purity sulfur hexafluoride, in order to ensure its safety, the equipment distribution equipment room shall comply with the following provisions:

Before entering the power distribution unit room of the high-purity sulfur hexafluoride equipment, turn the ventilator timer to the 15 minute position for strong ventilation. After ventilation, use a leak detector to measure the content of sulfur hexafluoride gas at the specified detection location to ensure that the indoor air is fresh. Strictly implement the site operation rules and regulations, and two people must enter the room for inspection, so as to help each other in case of sudden danger. In order to protect the safety of personnel and equipment, it is strictly forbidden to enter the sulfur hexafluoride distribution room for maintenance.

As high purity sulfur hexafluoride has excellent physical and chemical properties, arc extinguishing insulation performance, and the electrical resistance is 2.5 times that of air, the electrical resistance at 0.29 MPa is similar to that of transformer oil, and there is no oxygen in sulfur hexafluoride gas, so there is no oxidation problem at contacts and other parts.

The contact of high-purity sulfur hexafluoride equipment has little wear even if it is interrupted under high current. The sulfur hexafluoride electrical equipment is not only applicable to a wide range, but also convenient to maintain, occupying small ground and space. The fully enclosed combined electrical equipment made of sulfur hexafluoride gas as the insulating medium can include circuit breaker, disconnector, grounding switch, mutual inductor, bus, arrester and other components, and the high-voltage live parts are all sealed in the steel shell, without electric shock risk, which improves the safety of operation.

At the same time, due to the airtight combination, it avoids the impact of the external environment, and is suitable for the installation and use of substations in large cities, industrial intensive areas, and seriously polluted areas. Therefore, in recent years, electrical equipment with Liming sulfur hexafluoride gas as the leading insulating material has been widely used in power systems. Therefore, we should attach great importance to the safe operation of sulfur hexafluoride electrical equipment.

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