Safety Of Distribution Transformer And Precautions
Distribution transformers Is the distribution system beneath the legislation of electromagnetic induction transforms alternating voltage and present whereas the transmission energy of a static electrical communication. Normally installed in the telephone pole, stand, or Power Distribution, generally 6 to 10 kV enter voltage to four hundred volts or so customers. Transformer Immediately have an effect on the user is working is regular production and energy consumption, and related to the safety of electrical tools. So as to ensure that users spend high quality, safe energy, should guarantee the normal operation of distribution transformer. Due to this fact, we want to guard the configuration from the technical standpoint and the 2 points of day by day operation and management to speak in regards to the distribution transformer protection measures and precautions:
A protection configuration expertise 1, the set up of arrester safety towards lightning over-voltage: Lightning safety of distribution transformers, with the set up of steel oxide surge arresters without gaps for overvoltage safety to forestall the high Low Invasion of excessive-voltage lines caused by lightning wave transformer insulation breakdown, causing a short circuit, to stop lightning damage accident occurred. Arrester protection of distribution transformers, the primary by the conventional channels to purchase certified merchandise, the installation put into operation earlier than the rigorous testing necessities to run once more put into operation; second, the gear operating within the periodic preventive take a look at, the leakage present exceeds normal values to replace the substandard products in a well timed manner; third common transformer floor resistance testing, on 100KVA and above necessities for distribution transformer grounding resistance have to be less than 4 , following on 100KVA distribution transformer, required floor resistance must be lower than 10 . If the check worth will not be inside the provisions, needs to be taken to increase the earth wire, grounding and enhance the physical, chemical and different measures to achieve the required worth, every year in April and July for two advanced grounding resistance measurement, to captain america t shirt in sri lanka youtube forestall the welds unfastened weld , the surroundings and Different Elements resulting in the grounding resistance exceeded. If the transformer floor resistance exceeded, when the lightning present cannot move into the earth mine, however mine by the ground wire to low voltage distribution transformers added to the reverse facet of an extra increase for the high-voltage distribution transformer will likely be burned; Fourth, choose the set up location needs to be appropriate excessive-voltage arrester put in within the casing by high-voltage distribution transformer lead workplace nearest to minimize direct lightning penetrated the opportunity of distribution transformer, low voltage surge arresters put in in the newest low-voltage distribution transformers by casing Workplace, to make sure lightning proper before the invasion of distribution transformer action, according to Electric Normative requirements require the installation of equipment set up, to stop the indiscriminate set up of the significance of the loss safety.
2, the installation of speed off, over present safety, to ensure the selective removing of the fault line: distribution transformer short-circuit safety and overload protection put in at the distribution transformer from the excessive side of the fuses and low voltage side of the entire leakage Protector (The device has low voltage distribution transformer leakage safety and over current safety) to realize. To be able to successfully protect the distribution transformer, should appropriately choose the fuse melt (fuse, melt tablets, etc.) and low voltage over present protection worth. The choice of high-pressure side of the fuse needs to be able to ensure the interior or external casing in the transformer brief circuit passed off when fusing. Fuse choice principles: (1) capability of 100kVA and under the distribution transformer, excessive voltage fuse by 2 to 2.5 occasions the rated present selection; (2) capacity of more than 100kVA distribution transformer, high voltage fuse by 1.5 to 2 times the rated present selection. Low side leakage safety machine than the whole worth of mobile entry for low-voltage aspect of distribution transformer score of 1.Three times, with each department circuit overcurrent safety, low voltage variable worth shouldn’t exceed the whole value of the protection for the over circulate, its value must be lower than with Variable low-strain aspect of the rated current, typically primarily based on the maximum carrying capability of wire over-present worth of options to ensure a brief circuit within the outlet circuit or the output load is just too large, inflicting extreme load distribution transformer timely action, removing of the load and fault strains, to realize protection of distribution transformer functions. Meet necessities in any respect levels of the selective safety. Low-voltage branch circuit quick-circuit failure, the branch circuit motion, the entire leakage current safety device is not protected action, low-voltage side of the overall circuit failure or quick circuit, low voltage facet of the whole leakage current safety protector action, excessive-strain aspect of the melt shouldn’t fuse; transformer internal fault short circuit, high-strain aspect of the melt blown, the upper stage Transformer substation High Voltage Safety System not Tripping, to make sure proper distribution community safety device ranking motion. Melt distribution transformer high side protection material based on the standard equipment should resolutely put an end to copper, aluminum and other steel conductor alternative fuses melt.
Second, administration of day by day operations
1, to strengthen their routine inspections, maintenance and periodic testing of: (1) routine upkeep, cleaning time and erase high and low voltage distribution transformer oil and dust on the casing to stop the wet or rainy weather when pollution flashover discharge white casing brought on by quick circuit High-voltage fuse Fuse, distribution transformer can not perform correctly; Author Box gaga has 1 articles online
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