ZGSB Type Pad-mounted Seal Structure Tranformer

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Q:What is transformer reverse charging?
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). In electrical equipment and wireless circuits, commonly used as lifting voltage, matching impedance, safety isolation and so on.        When the transformer is shipped, it is determined whether it is used as a step-up transformer or a step-down transformer, and its relay protection setting requirements are specified. If the transformer is a step-up transformer, it is determined that the low-voltage side is zero-up. Such as from the high side of the anti-charge, then low side of the open circuit, due to the relationship between the high voltage side of the capacitor current will cause low voltage side due to electrostatic induction and over-voltage, easy to breakdown low-voltage winding. If you determine the normal high-voltage side of the transformer, such as from the low side of the anti-charge, then the high side of the open side, but the excitation current is large (up to 6 to 8 times the rated current). It produces the electric power, easy to make the mechanical strength of the transformer is a serious threat, at the same time, relay protection device may also hide the inrush current and malfunction.
Q:630KVA transformer can use the maximum number of power appliances
No additional measures in the case, 630KVA transformer can use the maximum 420KW power appliances. 1, the transformer power factor is generally 0.8 (also 0.7), then, the total power transformer = 630 * 0.8 = 504KW. 2, according to the "power engineering design manual", the transformer capacity, for a smooth load of a single transformer, the load rate is generally about 85%, so the upper case, with electrical power = 504 * 85% = 428.4KW. 3, if it is a single high-power motor, starting current as large, even if the measures, but also a corresponding reduction in electricity consumption. 4, if the three-phase imbalance, but also a corresponding reduction in electricity consumption.
Q:Transformer sales channels
1. Power supply company tender 2. Cabinet manufacturers 3, the installation company 4, direct customers, to the planning bureau to find, in advance to know which new project 5, design institute, know some late 6. Power supply company front desk, people come to install more late
Q:How to distinguish between large, medium and small transformers
We usually put the capacity of 630kVA and below the transformer for the small transformer; 800-6300kVA transformer for the medium-sized transformer; 8000-63000kVA transformer for large transformers; 90000kVA transformer for large transformers. With the transformer capacity bigger and bigger, in the past that can only be called large-scale medium.
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:How to calculate non - isolated power transformer parameters
General non-isolated auxiliary windings according to chip drop VCC operating range. T = 1 / f Dmin = Vout / Vin (max) Ton = T * Dmin Id = Io * 0.3 (0.3 for the ripple current coefficient) Inductor voltage V = Vinmin-Vout-0.6 (Schottky voltage drop) Lmin = V * dt / di If there are problems please go to the big bit of the forum electronic transformer plate
Q:Is the transformer a power supply?
Here, are relatively speaking. 1, if your equipment behind the transformer, then the output of the transformer is your power. 2, if your equipment in front of the transformer (such as a substation or generator), then the transformer is your load. 3, for example: at home, the adapter (to the phone with a transformer device), it is for your phone, that is, power, you said the socket, it is the load. 4, but if it is necessary to define it as what equipment, then it does not belong to the power supply equipment (power supply with a large generator, a small dry battery). It is able to change the power supply mode of the device.
Q:Transformer depreciation period is not specified?
Article 60 In addition to the provisions of the financial and taxation departments of the State Council, the minimum years for calculating depreciation shall be as follows: (A) houses, buildings, for 20 years; (B) aircraft, trains, ships, machinery, machinery and other production equipment for 10 years; (C) with the relevant utensils, tools, furniture, etc., for 5 years; (D) aircraft, trains, ships other than the means of transport for 4 years; (E) electronic equipment for 3 years. Tax law and the provisions of the age is basically the same is not a big difference, but the provisions of the tax law more intuitive Your company can choose according to the above I think is (b) The above is the minimum depreciation period stipulated by the enterprise. The enterprise can choose the appropriate depreciation period according to the actual situation (not lower than the minimum standard stipulated in the tax law). But not to say that the enterprise can arbitrarily extend the depreciation period according to the "hundred years" requirement to depreciate because it is compensation tax The shortest possible time to recover the expenditure to enhance the taxpayer's operating capacity
Q:How do I choose a transformer? The
According to the nature and size of the load to determine the capacity of the transformer. The ratio is selected according to the supply voltage and the voltage required for the load.
Q:10 (6) /0.4kv three-phase transformer what does it mean
Three-phase five-column core transformer must be used YN, yn0, yn0 connection, in the transformer must be connected into the angular connection of the fourth winding, it is not out of the beginning (the structure to do the electrical test when the lead is not This case). 5). When the transformer of different connection group is running in parallel, the general rule is that the connection group label must be the same. 6). When the distribution transformer is used in the multi-mine area, the Yzn11 connection method can be used. When the z-connection method is adopted, the impedance voltage algorithm is different from the Yyn0 connection method, and the copper consumption of the z-way winding is more. Yzn11 connection distribution transformer lightning protection performance is better. 7). Three-phase transformer with four volumes when the core frame can not be used YNy0 connection. 8). These are used for the domestic transformer connection, such as the export should be required to supply the appropriate connection and connection group label. 9). Generally in the high-voltage winding are connected with the tap-changer. Therefore, when selecting the on-load tap-changer (including the on-load tap-changer and the off-circuit tap-changer), it must be noted that the transformer connection and the on-load tap-changer (including connection, test voltage, rated current, Level voltage, voltage range, etc.). YN connected to the on-load tap-changer used on-load tap-changer, it is also important to note that the midpoint must be able to lead.  The answer is recommended by the questioner

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