First, the transformer installed in the low-voltage side heat shrinkable sleeve
Transformer in use, the low voltage side of the voltage level is very low, the transformer outlet is generally used in hard bus, so you can from the transformer wiring pile header has been to the switchgear bus, all installed insulation shrinkage set. If you are using a soft bus, transformer wiring can be installed near the pile and wall bushing insulation shrink sleeve. This can effectively prevent small animals and other transformers caused by short circuit. Transformer on the low voltage side of the different voltage levels of transformers, because they belong to the neutral point is a small current grounding system, it is necessary to take effective measures to prevent single-phase grounding occurs when the resonant over-voltage, resulting in dielectric breakdown, resulting in the transformer Short circuit.
Second, the transformer in the low-pressure side of the pillar porcelain vials cured silicone rubber pollution flashover
When the transformer is in use, the high-voltage switchgear can replace the anti-pollution porcelain bottle with larger creepage distance or brush the antifouling paint with silicone rubber at room temperature to prevent transformer short circuit caused by insulation breakdown. And for room temperature curing silicone rubber pollution flashover coatings should meet the relevant national standards. It is also possible to change the switch on the low-voltage side of the transformer to a switch with a larger breaking capacity to prevent short-circuiting of the transformer due to the switch explosion caused by the insufficient breaking capacity. On the transformer, bus and line surge arresters should be replaced by a good performance of zinc oxide surge arresters, improve equipment over-voltage levels. Constantly improve the protection of transformer configuration. Transformer protection as far as possible to take the computer, dual, as far as possible the installation of bus differential protection, failure protection, improve the protection of the movement of the reliability, sensitivity and speed. Transformer in the low side should be configured to limit the fast break protection, to ensure that the transformer short circuit, reliable, rapid removal of faults and reduce the impact of short-circuit the transformer and damage.
Third, to prevent the transformer short-circuit management measures
First of all, to strengthen the inspection of the transformer, the transformer in the process of using the transformer should be regularly checked, the purpose is to ensure the use of the transformer, the use of the transformer, the transformer can check makes it possible Occurrence of the accident was found in time to reduce the risk of transformer short-circuit.
Second, to make the calculation of the protection setting of the transformer in use, after scientific and reasonable calculation, the fault current flowing to the transformer can be cut off in the fastest time, so as to minimize the impact of the current on the transformer , To avoid transformer failure, the terminal substation, the protection of the value can be extended to the internal transformer, so that the protection of the transformer is very reliable.
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