A reasonable choice of distribution transformer installation site <br> distribution transformer voltage installation that is, to meet the user's requirements, and try to avoid the distribution transformer installed in the Barren, places vulnerable to lightning attacks and away from residential areas, so It is not convenient for the operators to maintain on a regular basis, which is not convenient for staff management.
2 Reasonable selection of the capacity of the distribution transformer <br> It is also very important to choose the capacity of the distribution transformer reasonably. It can neither cause the overload of the distribution transformer to burn out, nor can it cause the waste of the big horse type. According to the user load situation, the capacity should be counted and the distribution transformer capacity should be reasonably selected. For example, a 100 kV?A distribution transformer with a power factor of 0.85 can carry a load of 85 kW.
3 strengthening measure electricity load in <br> peak electricity load, the measurement should be strengthened on each distribution transformer load, increase the number of measurements, if necessary, three-phase distribution transformer current imbalance should be adjusted to prevent the If the neutral current is too large, it is easy to burn the lead and cause the user equipment to burn out.
4 Avoid installing low voltage distribution transformer metering box on <br> should be removed gradually installed on the remote mountainous area distribution transformer station low-pressure metering box, change indoor installation as much as possible, as in previous years, no power to destroy the Bureau Township, In order to facilitate management and prevent power loss, low-voltage metering boxes are installed in remote mountainous areas. Due to long-term operation, the glass of the measuring box is damaged or the low-voltage pile head of the distribution transformer cannot be replaced in time, causing the electric energy meter to be burned due to rain or other reasons. The electrical transformer is damaged.
5 rational allocation of high and low voltage distribution transformer fuse melt <br> high and low voltage distribution transformer fuse melt irrational allocation, distribution transformers likely to cause severe overload and burn distribution transformers. The high and low pressure melt configuration should follow: 1 a fuse with a capacity of 100 kV?A or less and a fuse of 2.0 to 3.0 times the rated current; 2 a transformer with a capacity of 100 kV?A or more with a melt of 1.5 to 2.0 times the rated current ; 3 The low-voltage side fuse should be configured slightly larger than the rated current.
6 It is not advisable to adjust the tap changer privately. <br> Because of the difference in power load between winter and summer, the voltage level is slightly different. In order to meet the voltage demand, some rural electricians randomly adjust the tap changer without performing related tests, resulting in the tap changer. Not in place, causing a phase-to-phase short circuit and burning the distribution transformer.
7 the level of distribution transformers installed insulation cover <br> to prevent natural disasters and external damage, if necessary, the installation of high and low voltage insulation cover of the narrow roads of the area and protected forest areas, causing low pressure to prevent things from falling on the distribution transformer short circuit burned transformer.
High and low voltage distribution transformer side 8 arresters should be installed <br> multi-level distribution transformers shall be installed minefield arresters, there is no timely replacement of inferior quality or arrester failure, vulnerable lightning attacks burned transformer. During the thunderstorm season, the arrester should be sent to the repair department for testing and timely installation. It is forbidden to use unqualified products.
9 periodically measuring earth resistance distribution transformer <br> distribution transformers run over a long period (especially ground leads using aluminum instead of) severe oxidation, grounding resistance increases, coupled with the buried grounding corrosion, fracture, resulting in neutral Point potential offset, when lightning strikes or overvoltage, it is easy to cause an accident. According to the regulations, the grounding device should meet: the grounding resistance of the distribution transformer below 100kV?A is not more than 10Ω, and the grounding resistance of the distribution transformer above 100kV?A is not more than 4Ω.
10 strengthen the daily management <br> regular visits to the line, cut down trees to prevent branches against a wire causing short circuit burned low voltage distribution transformers. The lack of daily management of the distribution transformer makes the transformer run out of oil for a long time. The end of the respirator is installed or the silica gel is not replaced in time, so that the distribution transformer is damp and easy to cause accidents. There are quality problems in the distribution transformer itself. Due to the remote installation location of the distribution transformer, some construction personnel arbitrarily put the untested distribution transformer into operation, temporarily using electricity, and burning the transformer.
11 low-voltage distribution transformers checked regularly leads <br> non nose with a wire line to do their own, low-voltage distribution transformers directly on to the pile head, periodically check, strong leads and distribution transformers pile head joint, to prevent loosening and burn Low distribution pile head of bad distribution transformer.
In order to make the distribution transformer operate safely for a long time, and there is less failure, as the operation management personnel, it is necessary to do diligent inspection, diligent maintenance, and diligent measurement, timely find problems and deal with them in time to avoid the failure to expand and burn the distribution transformer.
2 Reasonable selection of the capacity of the distribution transformer <br> It is also very important to choose the capacity of the distribution transformer reasonably. It can neither cause the overload of the distribution transformer to burn out, nor can it cause the waste of the big horse type. According to the user load situation, the capacity should be counted and the distribution transformer capacity should be reasonably selected. For example, a 100 kV?A distribution transformer with a power factor of 0.85 can carry a load of 85 kW.
3 strengthening measure electricity load in <br> peak electricity load, the measurement should be strengthened on each distribution transformer load, increase the number of measurements, if necessary, three-phase distribution transformer current imbalance should be adjusted to prevent the If the neutral current is too large, it is easy to burn the lead and cause the user equipment to burn out.
4 Avoid installing low voltage distribution transformer metering box on <br> should be removed gradually installed on the remote mountainous area distribution transformer station low-pressure metering box, change indoor installation as much as possible, as in previous years, no power to destroy the Bureau Township, In order to facilitate management and prevent power loss, low-voltage metering boxes are installed in remote mountainous areas. Due to long-term operation, the glass of the measuring box is damaged or the low-voltage pile head of the distribution transformer cannot be replaced in time, causing the electric energy meter to be burned due to rain or other reasons. The electrical transformer is damaged.
5 rational allocation of high and low voltage distribution transformer fuse melt <br> high and low voltage distribution transformer fuse melt irrational allocation, distribution transformers likely to cause severe overload and burn distribution transformers. The high and low pressure melt configuration should follow: 1 a fuse with a capacity of 100 kV?A or less and a fuse of 2.0 to 3.0 times the rated current; 2 a transformer with a capacity of 100 kV?A or more with a melt of 1.5 to 2.0 times the rated current ; 3 The low-voltage side fuse should be configured slightly larger than the rated current.
6 It is not advisable to adjust the tap changer privately. <br> Because of the difference in power load between winter and summer, the voltage level is slightly different. In order to meet the voltage demand, some rural electricians randomly adjust the tap changer without performing related tests, resulting in the tap changer. Not in place, causing a phase-to-phase short circuit and burning the distribution transformer.
7 the level of distribution transformers installed insulation cover <br> to prevent natural disasters and external damage, if necessary, the installation of high and low voltage insulation cover of the narrow roads of the area and protected forest areas, causing low pressure to prevent things from falling on the distribution transformer short circuit burned transformer.
High and low voltage distribution transformer side 8 arresters should be installed <br> multi-level distribution transformers shall be installed minefield arresters, there is no timely replacement of inferior quality or arrester failure, vulnerable lightning attacks burned transformer. During the thunderstorm season, the arrester should be sent to the repair department for testing and timely installation. It is forbidden to use unqualified products.
9 periodically measuring earth resistance distribution transformer <br> distribution transformers run over a long period (especially ground leads using aluminum instead of) severe oxidation, grounding resistance increases, coupled with the buried grounding corrosion, fracture, resulting in neutral Point potential offset, when lightning strikes or overvoltage, it is easy to cause an accident. According to the regulations, the grounding device should meet: the grounding resistance of the distribution transformer below 100kV?A is not more than 10Ω, and the grounding resistance of the distribution transformer above 100kV?A is not more than 4Ω.
10 strengthen the daily management <br> regular visits to the line, cut down trees to prevent branches against a wire causing short circuit burned low voltage distribution transformers. The lack of daily management of the distribution transformer makes the transformer run out of oil for a long time. The end of the respirator is installed or the silica gel is not replaced in time, so that the distribution transformer is damp and easy to cause accidents. There are quality problems in the distribution transformer itself. Due to the remote installation location of the distribution transformer, some construction personnel arbitrarily put the untested distribution transformer into operation, temporarily using electricity, and burning the transformer.
11 low-voltage distribution transformers checked regularly leads <br> non nose with a wire line to do their own, low-voltage distribution transformers directly on to the pile head, periodically check, strong leads and distribution transformers pile head joint, to prevent loosening and burn Low distribution pile head of bad distribution transformer.
In order to make the distribution transformer operate safely for a long time, and there is less failure, as the operation management personnel, it is necessary to do diligent inspection, diligent maintenance, and diligent measurement, timely find problems and deal with them in time to avoid the failure to expand and burn the distribution transformer.
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