Protection Of Distribution Transformer And Precautions
Distribution transformers Is the distribution system underneath the legislation of electromagnetic induction transforms alternating voltage and current whereas the transmission power of a static electrical communication. Often installed in the phone pole, stand, or Energy Distribution, typically 6 to 10 kV input voltage to 400 volts or so users. Transformer Straight have an effect on the person is running is regular production and energy consumption, and related to the safety of electrical equipment. So as to make sure that customers spend high quality, protected energy, should ensure the conventional operation of distribution transformer. Subsequently, we want to guard the configuration from the technical point of view and the two points of every day operation and administration to talk about the distribution transformer safety measures and precautions:
A safety configuration technology 1, the set up of arrester protection in opposition to lightning over-voltage: Lightning safety of distribution transformers, with the set up of metal oxide surge arresters with out gaps for overvoltage safety to forestall the high Low Invasion of high-voltage lines caused by lightning wave transformer insulation breakdown, inflicting a brief circuit, to forestall lightning harm accident occurred. Arrester safety of distribution transformers, the primary by the normal channels to buy certified merchandise, the installation put into operation before the rigorous testing requirements to run once more put into operation; second, the tools operating within the periodic preventive test, the leakage present exceeds standard values to change the substandard merchandise in a timely method; 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 less than 10 . If the take a look at worth is just not inside the provisions, needs to be taken to increase the earth wire, grounding and enhance the physical, chemical and other measures to attain the required worth, each year in April and July for 2 advanced grounding resistance measurement, to prevent the welds loose weld , the surroundings and Different Factors resulting in the grounding resistance exceeded. If the transformer floor resistance exceeded, when the lightning current can’t movement into the earth mine, however mine by means of the bottom wire to low voltage distribution transformers added to the reverse side of a further boost for the excessive-voltage distribution transformer shall be burned; Fourth, select the set up location needs to be applicable excessive-voltage arrester installed in the casing by excessive-voltage distribution transformer lead office nearest to minimize direct lightning penetrated the opportunity of distribution transformer, low voltage surge arresters installed in the newest low-voltage distribution transformers by casing Workplace, to ensure lightning right before the invasion of distribution transformer action, blue t shirt superman jobs in keeping with Electric Normative standards require the installation of equipment installation, to prevent the indiscriminate installation of the significance of the loss protection.
2, the installation of speed off, over current safety, to ensure the selective removal of the fault line: distribution transformer brief-circuit safety and overload safety installed at the blue t shirt superman jobs distribution transformer from the excessive side of the fuses and low voltage aspect of the full leakage Protector (The gadget has low voltage distribution transformer leakage safety and over current safety) to attain. As a way to successfully protect the distribution transformer, should correctly choose the fuse melt (fuse, melt tablets, and many others.) and low voltage over present protection worth. The choice of high-strain facet of the fuse should be able to guarantee the internal or exterior casing in the transformer quick circuit befell when fusing. Fuse selection ideas: (1) capability of 100kVA and under the distribution transformer, excessive voltage fuse by 2 to 2.5 instances the rated present selection; (2) capacity of more than 100kVA distribution transformer, excessive voltage fuse by 1.5 to 2 occasions the rated current choice. Low side leakage safety device than the entire value of mobile access for low-voltage side of distribution transformer score of 1.3 times, with each branch circuit overcurrent safety, low voltage variable value shouldn’t exceed the total worth of the safety for the over move, its worth must be lower than with Variable low-pressure side of the rated present, usually based on the maximum carrying capability of wire over-present value of options to ensure a brief circuit in the outlet circuit or the output load is too large, inflicting extreme load distribution transformer well timed action, elimination of the load and fault traces, to attain protection of distribution transformer purposes. Meet necessities in any respect levels of the selective safety. Low-voltage department circuit short-circuit failure, the department circuit motion, the total leakage present protection system shouldn’t be protected motion, low-voltage aspect of the entire circuit failure or quick circuit, low voltage aspect of the entire leakage present protection protector motion, excessive-pressure side of the melt should not fuse; transformer inside fault short circuit, excessive-stress facet of the melt blown, the higher level Transformer substation High Voltage Safety Machine not Tripping, to ensure proper distribution network safety gadget rating action. Melt distribution transformer excessive facet protection material in response to the standard equipment must resolutely put an end to copper, aluminum and different metallic conductor alternative fuses melt.
Second, management of every day operations
1, to strengthen their routine inspections, upkeep and periodic testing of: (1) routine maintenance, cleansing time and erase high and low voltage distribution transformer oil and dust on the casing to prevent the wet or rainy weather when pollution flashover discharge white casing caused by short circuit Excessive-voltage fuse Fuse, distribution transformer can’t operate correctly; Author Field gaga has 1 articles on-line
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