SC(B)9-30~2500 Epoxy Resin Dry Type Power Transformer

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SC(B)9-30~2500 epoxy resin dry type power transformer is produced by advanced checkout equipment and strict technology,high quality material and scientific recipes .it has material and sentific has strongpoint of high reliability and long service life.according to different operation environmen,it can be equipped with the shells of different protection grades or is regarded as regeneration product of oil immersed is appicable to high rise building,emporium,airport,tunnel,chemical plant,nuclear power plant,shipping and other important or special places

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Q:Why the provisions of the maximum temperature of the provisions of the transformer 65 °?
Transformers and other electrical equipment temperature limit is determined by the level of insulation materials. Insulation grade refers to the heat resistance of the insulation material used, divided into A, E, B, F, H grade. Allowable temperature rise is the limit of the temperature of the electrical equipment compared to the ambient temperature. Insulation temperature class A grade E grade B grade F grade H grade Maximum permissible temperature (° C) 105 120 130 155 180 Winding temperature limit (K) 60 75 80 100 125 Performance reference temperature (° C) 80 95 100 120 145 In the electrical equipment such as transformers, the insulating material is the weakest link. Insulation material is particularly susceptible to high temperature and accelerated aging and damage. Different insulation materials have different heat resistance, the use of different insulation materials, electrical equipment, the ability to withstand high temperatures are different. So the general electrical equipment is specified in the maximum temperature of its work. You ask the question, the top of the oil temperature does not exceed 65 ℃, is in the case of rated load manufacturers consider a variety of factors to ensure that the insulation material is not damaged by the temperature limit. Under normal circumstances the top of the transformer oil temperature is the highest.
Q:Transformer turns around the number and how much V is calculated
2, seeking coil turns Primary coil n1 = 220 ╳ 9.8 = 2156 turns Secondary coil n2 = 8 ╳9.8 ╳ 1.0 = 82.32 desirable for 82 turns 1.05 in the calculation of the secondary coil turns is the pressure drop when a load is considered
Q:1000KVA transformer power loss is how much
The gap between the various models is also great, but also with the size of the load. To the S9 parameter is the no-load loss is 1.7KW, which is the same, full load loss is 10.3KW, this load-related. If the transformer is fully loaded, then the power loss = (1.7 + 10.3) X1H = 12 degrees 1 hour. S11 of the no-load loss is 1.15KW, full load loss is 10.3KW, full load run loss of power = 1.15 + 10.3 = 11.45 degrees 1 hour
Q:TN-S system in the transformer side pe line and n-line neutral point how to take
1, this part you can not look at the design rules, the design process is just that principle, should go to check the installation Atlas; 2, the transformer is the neutral point leads to two lines, one to the transformer shell, and then the shell is also grounded; another to the indoor low-voltage cabinet; this is a line after the PEN line, conditions can lead two , But mostly cited a, is shared by PE and N; 3, in the low-voltage cabinet, from the transformer zero leads to the line is divided into two, one neutral line N, the other is to protect the ground PE; generally in order to ground and reliable, where the PE to access the cabinet, The distribution cabinet is installed on the ground network, is directly connected with the ground network, so it is equal to repeat the ground; 4, N line is the work line, for single-phase load, that is, to over-current, or single-phase equipment can not work; and PE line is the protection line, there is no current flow, a current, , And this should pay attention.
Q:What is the impedance voltage standard of a power transformer?
High-low 12-14%, medium-low 7-9%; buck: high - medium 12-14% High - low 22-24%, medium - low 7-9%
Q:This transformer outputs AC or DC
The transformer on your diagram is the power frequency isolation transformer. Input communication, the output is also communication. If you encounter a transformer with DC output, it can only say that it has pre-installed rectifier components rectified and then output, but this situation is almost no, mainly practical and electrical safety.
Q:Transformer and the middle of what is the difference
Often referred to as the transformer is the frequency transformer, is used to change the size of the AC voltage electrical equipment. It is based on the principle of electromagnetic induction, with the same frequency, between two or more windings, the exchange of AC voltage and current to transmit electrical energy of the static electrical equipment. In the week is the IF transformer or inductance coil, is a fixed resonant circuit with a transformer, the resonant circuit can be fine-tuning within a certain range, so that access to the circuit can achieve a stable resonant frequency. Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.
Q:Rules for the operation of cooling devices for oil - cooled transformers
A, cooler should take their own independent dual power supply, and can automatically switch, when the work of power failure, automatically put into standby power, and issued a sound signal;  B, the transformer upper oil temperature reaches 55 ℃ or the current reaches 70% of the rated value, the auxiliary cooler automatically input;
Q:Why 21 lighting transformers must use double-winding safety isolating transformers,
Double-winding type safety isolation transformer load side and the power supply side is not electrically connected, is safe, and autotransformer primary shared a winding, it has a direct electrical connection with the power supply, unsafe.
Q:500KW load should be installed how much transformer?
Mainly to see what the load, if it is home lighting electricity, according to the 0.9 power factor and 20% of the margin, you need to be equipped with 500 / 0.9 / 0.8 = 694.4, you can take 750 kilovolt capacity can be. (Consider the future expansion of another operator), if it is with the motor and other load-based, due to power factor and start the current reasons, at least 900 kVA more appropriate. If the drive is more than 200 kilowatts, the starting current is very large, you need to put a larger margin or the motor using the buck mode (increase the investment cost).

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