Mining Flameproof Dry-Type Transformer KBSG9

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1.Product description
KBSG9 series mining flameproof dry-type transformersuit for not only mines filled with firedamp mixed gas, grime and explosive gas, but also the gas and steam environment that can not erode metal or destroy insulation. the transformer has the merit of high strength, low temperature rise, good cooling and waterproof property, and easy maintenance.

2.Functional characteristics
Functional characteristics
1.The KBSG9-50-1600/10(6) mining flameproof of dry type transformer conforms to GB82862005 the requirement of “mining flame proof movable substations”, its no load, load loss is 10% less than original standard the no-load current short-circuit impedance has diminished too. 2.The insulation material adopt the H level or the C level insulation material, the thermal is good, it is suit for long time operation 3.3 Phases,50Hz,ANAN 4.High strength, low temperature rise, good cooling and waterproof propert, and easy maintenance.

Service conditions
1.The installation is not higher than 1000m(normal)special environment gives explanation in addition
2.Ambient temperature
Highest temperature: 40˚C
Maximum monthly average temperature: 30˚C
Maximum annual temperature: 20˚C
Lowest temperature: -5˚C
3.The surrounding air relative humidity is not greater than 95%(25˚C)
4.In the mine,with methane, dust explosion danger is well
5.No vibration the gradient is less than 15˚C
6.No gas or steam to corrode metal needed or destroy insulation
7.Non-water drop sit
8.Power supply voltage profile approximate to a sine wave
9.The three-phase supply voltage approximate symmetrical

Scope of application
Mine filled with fire damp mixed gas, grime and explosive gas; the gas and steam environment that can not erode metal or destroy insulation
6KV Mining Flameproof Dry-Type Transformer Technical Specification(KBSG9)

Rated capacity(kVA)Voltage schedule(kV)Vector groupShort circuit impedance(%)Consumption(W)No-load current(%)Weight(kg)Outline dimension(mm±10%)
HVLVNo-load(kw)Load(kw)LengthWidthHeight
KBSG-50/660.693/0.4
1.2/0.693
3.45
Yu0(d11)43505502.51250207511001050
KBSG-80/64507802.51300215011001100
KBSG-100/65209202.51400215011001100
KBSG-160/670013002.01500220011001220
KBSG-200/682015502.02100265011001400
KBSG-250/695018002.02470269011001420
KBSG-315/6110021501.82895283011001410
KBSG-400/6130026001.83260292011001440
KBSG-500/6150031001.53700299011001475
KBSG-630/6180036801.54120305011001550
KBSG-800/6Yu0(d11);Yyn0205045001.05300310011001430
KBSG-1000/6235054001.05700316011001480
KBSG-1250/6Yu0;Yyn0275065001.06600320011001520
KBSG-1600/6335080000.87600326011001570

Rated capacity(kVA)Voltage schedule(kV)Vector groupShort circuit impedance(%)Consumption(W)No-load current(%)Weight(kg)Outline dimension(mm±10%)
HVLVNo-load(kw)Load(kw)LengthWidthHeight
KBSG-50/10100.693/0.4
1.2/0.693
3.45
Yy0(d11)43906802.51250207511001050
KBSG-80/104908802.51300215011001100
KBSG-100/1056010502.51400215011001100
KBSG-160/1080015002.01500220011001200
KBSG-200/1095018002.02200276011001480
KBSG-250/10110021002.02760280011001510
KBSG-315/10130025001.82990284011001500
KBSG-400/10150030001.83430294011001550
KBSG-500/10175035001.53800302011001600
KBSG-630/10200041001.54380314011001410
KBSG-800/10Yy0(d11);Yyn0230051001.25400319011001490
KBSG-1000/104.5260061001.26500324011001530
KBSG-1250/10Yy0;Yyn0310074001.07100330011001580
KBSG-1600/105380085001.08050335011001630


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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
Q:Transformer Transformer Principle
Transformers rely on two coils to transform. Principle is in the case of loss without loss according to the input power = output power, that is, P1 = U1 * I1 = U2 * I2 = P2 to change the pressure, specifically in high school physics textbooks, I now basically forget
Q:Two different impedance of the transformer, parallel load how to allocate?
Two parallel operating impedance must be equal, because the parallel operation of the transformer load is inversely proportional to the impedance voltage distribution, if the impedance voltage difference is too large, will lead to the occurrence of excessive impedance voltage overload phenomenon is recommended to allow the difference is generally not more than 10% , The general formula is St1 = S * Zt2 / (Zt1 + Zt2), St2 = S * Zt1 / (Zt1 + Zt2), where Zt is the per unit value, Zt = Uk% * Sd / 100Sn 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:Why 21 lighting transformers must use double-winding safety isolating transformers,
Autotransformer A set of coils, which have a tap, can not achieve isolation. Or two sets of coils are attached.
Q:What is the difference between AC transformers and DC transformers?
DC can not be used transformer transformer, (available switch circuit DC-DC conversion.) Only AC only transformer with transformer.
Q:Single-phase and three-phase transformer is what it means
Single-phase transformer, generally refers to the primary coil is a single-phase single-coil design, the secondary can have one or more winding coil, the ideal state of the secondary total power is equal to the total primary power. For example, the common primary power supply low voltage 220 volts, the core made of mouth font, Japanese font, ring, R-shaped. Three-phase transformer, the general primary three windings, the connection is divided into triangular and star, Yanbian triangle, etc., the three winding voltage phase difference between 120 degrees, which is the common three-phase 380-volt wiring, the core The traditional three-phase three-core column, three-phase five-pin column, involute and other forms. In fact, there are many substation large-scale three-phase transformer, in order to transport and installation convenience, but also for good heat dissipation, there are three separate single-phase transformer, the use of traditional triangular or star connection input, equivalent to a Three-phase transformer.
Q:What is a transformer?
First talk about the buck, usually we use a variety of voltage, such as life lighting is 220V, industrial safety lighting is 36V, welding machine voltage also need to be adjusted, which are inseparable from the transformer, the transformer through the main and auxiliary coil electromagnetic Mutual inductance principle, can reduce the voltage to the voltage we need. In the process of long-distance voltage transmission, we need to raise the voltage to a high, in order to reduce the voltage loss, usually rising to several thousand volts or even tens of kilovolts, which is the role of the transformer.
Q:Single bus sub-section for power distribution, transformer with a prepared and dual-use how to understand
One with one: single bus segment switch closed, only one transformer power supply, another standby. Dual use: single bus section switch off, two transformers were powered. Added: Single bus segment wiring form, it is a single bus with sub-section breaker into several sections. Increased reliability and flexibility compared to single-bus non-segmentation. Advantages: 1, two bus segments can be split operation, can also run side by side; 2, important users can be connected to a different dual-circuit busbars, to ensure uninterrupted power supply; 3, any bus or disconnector overhaul, only stop the paragraph, the remaining sections can continue to power, reducing the power outage range.
Q:Transformer copper row selection
Selection principle of transformer copper Meet the load requirements; Transformer corresponding to the rated current in accordance with 1.1 times the overload factor to consider; To meet the safety distance, and components aligned; Satisfy the dynamic stability. Transformer copper selection considerations The choice of copper can not just consider the current carrying capacity it also consider the maximum short-circuit current size, that is, consider the choice of a copper after the most short-circuit when the short-circuit current short-circuit the size of the current matching the size of the protection (that is, Relay protection value size).
Q:2500KVA transformer rated current 3608A, how much can be overloaded current?
Ventilated good circumstances, you can temporarily overload 300A.

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