Solutions To Prevent Transformer Short Circuit

First, install insulation heat shrink sleeves in the middle and low voltage side of the transformer

When the transformer is in use, the voltage level of the middle and low voltage side is very low, and the outgoing wire of the transformer is generally a hard bus, so that the insulation heat shrink sleeve can be installed from the transformer wiring pile to the bus bar of the switch cabinet. If the soft bus is used, the insulation heat shrink sleeve can be installed near the transformer wiring pile and the wall bushing. This can prevent transformer short circuit caused by small animals. The medium and low voltage side of the transformer is a transformer of different voltage levels, because it belongs to the neutral point belongs to the small current grounding system, so the best measures should be taken to prevent the resonant overvoltage when the single-phase grounding occurs, resulting in insulation breakdown, resulting in short circuit of the transformer.

Second, the pillar porcelain bottle in the low-voltage side of the transformer is cured silicone rubber anti-fouling flash paint

When the transformer is in use, the high-voltage switch cabinet can be replaced with an anti-fouling porcelain bottle with a larger climb distance, or it can be painted with an anti-fouling flashover coating of silicon rubber cured at room temperature to prevent transformer short circuit caused by insulation breakdown. And the room temperature curing silicone rubber anti-fouling flashover coating should meet the relevant national standards. The switch on the low-voltage side of the transformer can also be replaced with a switch with a larger breaking capacity to prevent short circuit of the transformer caused by insufficient breaking capacity. The transformer, bus bar and line arrester should be replaced with good performance zinc oxide arrester to improve the overvoltage level of the equipment. Continuously improve the protection configuration of the transformer. Transformer relay protection as far as possible to take microcomputerization, dual, as far as possible to install bus differential protection, failure protection, improve the reliability of the protection action, sensitivity and speed. The medium and low voltage sides of the transformer should be configured with limited speed break protection to ensure that when the transformer short-circuit occurs, the fault is reliably and quickly removed to reduce the impact and damage of the short circuit to the transformer.

Third, management measures to prevent transformer short circuit

First of all, it is necessary to strengthen the inspection of the transformer, in the process of using the transformer, the transformer should be regularly inspected, the purpose of doing so is to ensure the use of the transformer, when the transformer is used, the inspection of the transformer can make possible accidents to be found in time, reduce the harm caused by short circuit of the transformer.

Secondly, it is necessary to calculate the protection setting value in the use of the transformer. After scientific and reasonable calculation, the fault current flowing to the transformer can be cut off in the fastest time, so that the impact of the current on the transformer can be reduced **** and the fault of the transformer can be avoided. For the terminal substation, the protection setting value can also be extended to the inside of the transformer. This is very reliable for the protection of the transformer.