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Date：08-03-2021
Ring network cabinet: also known as HXGN-12, XGN15-12 type high voltage switchgear.Originally refers to the switch cabinet used in the ring distribution network, because of its simple structure, commonly used load switch and fuse combination, such switch batch ring network cabinet.
1, the ring network cabinet has three forms of air insulation, fully enclosed inflatable cabinet and solid insulation, air insulation is the use of common SF6 load switch through the copper bar connected into a system, SF6 load switch filled with sulfur hexafluoride gas, other live parts are made in the ordinary insulation way.
2. Inflatable cabinet (gas insulated ring network cabinet) has a special connection appliance in addition to the power supply inlet and outlet lines, and the cabinet and cabinet are connected in a complete gas chamber, which is filled with SF6 gas. The switch and high voltage live parts are sealed in the gas box filled with SF6 gas, which has a quality improvement in life and safety compared with the traditional ring network cabinet.Compared with the solid cabinet, it has a higher economic type and cost performance.At present, most of the newly added ring network cabinets have taken the inflatable cabinets as the first choice to replace the ring network cabinets!
3, solid cabinet (solid insulation ring network cabinet) is the same as the gas-filled cabinet, and is the upgrade equipment of ordinary ring network cabinet.Different from the gas-filled cabinet which is insulated by gas, the insulation form of the solid cabinet is that the switch and the high-voltage live parts are cast with epoxy resin as a whole, and the epoxy resin is fixed as a new type of distribution equipment which is insulated by the live body to the ground and between phases.Solid cabinet as an upgrade of the ordinary ring network cabinet, compared with the inflatable cabinet has better insulation performance, and the adaptability to the harsh environment is better than the inflatable cabinet, can reasonably choose solid cabinet and inflatable cabinet according to the use of the environment.
Ring network cabinet is a group of high voltage switch device in a steel sheet metal cabinet put oneself in another’s position or make it assembled within the interval type ring network power supply unit electrical equipment of high voltage switchgear cabinet put oneself in another’s position, its core part USES the load switch and fuse, has the advantages of simple structure, small volume, low price, can improve the power supply parameters and performance as well as the advantages of power supply security, is the load switch cabinet commonly known as the medium voltage system.
Ring network cabinet is the upgrade product of isolation switch cabinet. The working current is generally cut off by the contactor load switch.The short circuit current is cut off by a fuse.Switchgear can be installed a variety of protection devices, design a variety of protection: over current, quick break, grounding, and even differential, negative sequence, reverse power and reclosing, and so on.Isolation switch cabinets are protected only by fuses.
The ring network cabinet does not appear for a long time, but it has been widely used, which is mainly due to the new development of industrial enterprises and institutions of the building.The middle cabinet is mainly used for power plants, small and medium-sized generators to send electricity, the power system of the secondary substation, power distribution of industrial and mining enterprises and institutions, as well as the start of large high voltage motors.We can choose which one to use according to its use and other characteristics to meet our work and life needs.
The difference between inflatable cabinet and ordinary ring network cabinet
1, the use of different environment
Ordinary ring network cabinet is mostly used in the ring network, the ordinary ring network cabinet is the rated current is not more than 630A load switch cabinet and combination of electrical cabinet combination form, belongs to the secondary distribution equipment;The inflatable cabinet is a kind of switching equipment with gas as the insulating medium. According to the application field, it can be divided into primary power distribution equipment and secondary power distribution equipment. Under normal circumstances, the rated current is less than or equal to 630A.
2, the switch mode is different
The main body of the inflatable cabinet has the function of switching on and cutting off the load current, and the function of cutting off the fault current, and most of the inflatable cabinet has the arc extinguishing ability, the structure is complex, the cost is high, and can be used with the protection and automatic device;And the ring network cabinet is installed in the load switch is only manual operation, basically no automatic cut off the load current function.
3, insulation medium is different
Inflatable cabinet small size of the bus is small, with sulfur hexafluoride gas as insulation medium.Ordinary ring network cabinet uses air insulation as insulation medium.
