High-voltage switchgear before and after the interval without reliable isolation of the work should be simultaneous blackout.
High-voltage switchgear before and after the interval:
In high-voltage switchgear, such as: KYN28-12 high-voltage switchgear, there are five intervals; that is, the busbar intervals, cable intervals, secondary protection intervals, intermediate hand workshop, the transformer metering intervals, these intervals, there should be a separation, to prevent electrocution, the implementation of the five prevention requirements.
Electrical gap is the shortest air distance between different charged bodies. In the "Electrical Design Taboo Manual" in the rated voltage "greater than 300V less than 660V" creepage distance of 14MM, 12kV electrical products electrical equipment, electrical clearance requirements are 125mm.
Switchgear, distribution cabinets, according to its own electrical clearance voltage level electrical clearance is not the same, 10kV high-voltage switchgear. The same, 10kV high-voltage switchgear and distribution cabinet electrical clearance requirements is not less than 125mm. 35KV switchgear GB3906 requirements for the electrical clearance is 300mm.
High-voltage switchgear explained:
High-voltage switchgear is a metal-enclosed switchgear is commonly known as the circuit program will be related to the circuit program will be assembled in an enclosed metal switchgear. Electrical equipment is assembled in a closed metal enclosure of the complete set of power distribution equipment.
High-voltage switchgear is widely used in power distribution systems, for the acceptance and distribution of electrical energy. Both according to the grid operation needs to be part of the power equipment or line into or out of operation, but also in the power equipment or line failure will be part of the fault from the grid to quickly remove, so as to ensure that the normal operation of the grid in the part of the normal operation of the fault-free, as well as equipment and operation and maintenance personnel safety. Therefore, the high-voltage switchgear is a very important power distribution equipment, its safe and reliable operation of the power system has a very important significance.
Switchgear consists of a fixed cabinet and withdrawable parts (referred to as handcart) two major components.
The switchgear has a reliable interlocking device to meet the requirements of the five defenses, which effectively protects the safety of operators and equipment.