FAQ
What role does the DC system play in the substation?
DC system in the substation for control, signal, relay protection, automatic devices and emergency lighting can provide the DC power supply. It also provides operational power for operation. Whether the DC system can be used or not plays a vital role in the safe operation of the substation and is the guarantee of the safe operation of the substation.
What are the current transformer wiring methods?
The wiring mode of current transformer includes two-phase V-shaped wiring and two-phase current difference wiring using two current transformers; Three-phase Y-shaped wiring, three-phase Δ-shaped wiring and zero sequence wiring using three current transformers.
What is the effect of the filter?
The filter is an indispensable high-frequency communication component for carrier communication and high-frequency protection. It prevents high-frequency current from leaking to other branches and plays a role in reducing high-frequency energy loss.
What is the harm of casing crack?
Casing cracks will reduce the insulation strength, can cause further damage to the insulation, until all breakdown. Water in the cracks may also burst the casing when it freezes. It can be seen that the casing crack is a threat to the safe operation of the transformer.
What is a fully insulated transformer? What is a semi-insulated transformer?
Semi-insulation is the main insulation of the winding near the neutral point of the transformer, and its insulation level is lower than the insulation level of the end winding. On the contrary, the insulation level of the first end and the end winding of the transformer is generally called full insulation.
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