1. After opening, establish a reliable insulation gap to separate the equipment or line that needs to be overhauled from the power supply with an obvious disconnection point to ensure the safety of maintenance personnel and equipment.
2. According to the operation needs, change the line.
3. It can be used for small currents in the distribution and closing lines, such as the charging current of bushings, busbars, connectors, and short cables, the capacitance current of switching equalizing capacitors, the circulation current when the double bus is replaced, and the excitation current of the voltage transformer.
4. According to the specific situation of different structure types, it can be used to divide and combine the no-load excitation current of a certain capacity transformer.
According to the different installation methods, high-voltage disconnectors can be divided into outdoor high-voltage disconnectors and indoor high-voltage disconnectors.
Outdoor high-voltage disconnector refers to a high-voltage disconnector that can withstand wind, rain, snow, dirt, condensation, ice and heavy frost, etc., and is suitable for installation on terraces.
According to the different insulating pillar structure, it can be divided into single-column disconnector, double-column disconnector and three-column disconnector. Among them, the single-column disconnector directly uses the vertical space as the electrical insulation of the break under the overhead bus, so it has the obvious advantage of saving floor space, reducing the lead wire, and the state of opening and closing is particularly clear. In the case of ultra-high voltage transmission, the effect of saving floor space is more significant after the single-column disconnector is used in the substation.
The disconnector is mainly used in low-voltage terminal power distribution systems such as residential buildings and buildings in low-voltage equipment.
Main function: with load breaking and connecting line.
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