Switch is a switching device mainly used for "isolating power supply, switching operation, connecting and cutting off small current circuit", and has no arc extinguishing function. When the switch is in position, there is an insulation distance between the contacts that meets the specified requirements and obvious disconnection signs; When in the closed position, it can withstand the current under normal loop and abnormal current within the specified time.
Extended data:
Functions of the switch:
After breaking the brake, establish a reliable insulation gap, and separate the equipment or lines that need maintenance from the power supply with obvious disconnection points to ensure the safety of maintenance personnel and equipment.
According to the operation needs, replace the line.
It can be used to shunt and merge small currents in lines, such as the charging current of bushings, buses, connectors and short cables, the capacitance current of switching voltage equalizing capacitors, the circulating current when switching double buses and the excitation current of voltage transformers.
According to the specific conditions of different structural types, it can be used to divide and combine the no-load excitation current of transformers with a certain capacity.
T is the test button. The other key is the reset key. This button will pop up when the leakage protector protects it. If you want to turn it on and off, you must first press this button to turn off the air switch.
References:
Baidu encyclopedia-switch