DKS Series Grounding Transformer

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Product Description:

1. Product Description:

The grounding transformer is usedin the three phase power system with neutral insulation, to provide artificial neutral point.

This neutral point can be directly grounded. It can also begrounded by reactor or arc suppression coil. With a secondary winding,

the grounding transformer can not only provide a neutral point for system but also provide power supply to other parts of system.

 

2. Product Characteristic:

Special environment should be informed such as altitude, chemicaldeposition, dirt, corrosive media, etc., for dry-type transformers insulation shouldbe provided.

l  Mean annual temperature is +20and below +20(if it’s water-cooling product,  the highest daily average temperature of cooling-water is +25)

l  Altitude is not more than 1000m.

l  Installation site should be without seriousvibration, bumps and chemical corrosion,

 

3.Specification

Type

Primary rated capacity

kVA

Secondary rated capacity

kVA

Rated voltage

kV

Neutral point voltage

A

Outline Dimension

L x W x H

DKS-200/6

200

6.3

50

1260×850×1460

DKS-315/6

315

10.5

50

1580×900×1500

DKS-400/6

400

8.3

100

1610×910×1550

DKS-630/10

630

10.5

100

1640×950×1600

DKS-315/10

315

50

10.5/0.4

50

1740×975×1670

DKS-315/10

315

160

10.5/0.4

50

1755×990×1600

DKS-630/10

630

250

10.5/0.4

100

1800×1010×1800

 

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Q:What is the meaning of the transformer capacity unit KVA?
KVA for apparent power, its size and power factor! For example: power factor cosΦ = 0.8 active power P = 1Kw Then tgΦ = 0.75, so the square of the apparent power S = the square of P + the square of P * tgΦ When the power factor is 1, 1KVA = 1KW
Q:1000KVA transformer no-load loss is how much?
I am in the "China Electromechanical Product Catalog" found a data, 10KV, S9-1000KVA no-load loss is 1.7KW, so the annual loss of power: 1.7 * 8760 = 14892KWH (degrees).
Q:Transformer oil filter method
Transformers in the run after a period of time, if due to short circuit and other causes of transformer oil quality electrical test failed to test the need for oil treatment, improve its purity. The main reason for failure is excessive water content, including other impurities. Transformers because it has been oiled and can not be all out of all the oil out of the filter processing.
Q:Transformers of the three transformations are the three?
Do not know you specifically refers to the meaning, in general, the transformer can change the voltage, variable current, variable phase
Q:What is the transformer capacity ratio? Capacity than 100%.
Have not heard, you say is not the main transformer parallel run between the main transformer and the capacity and capacity of the ratio, or the meaning of such I made a change, you say is not: the transformer once measured capacity can be transferred to the secondary side or three times, such as three winding 50000KVA main transformer, 100/100/100, is the primary capacity can be all to the two Secondary use, you can also use all the three times, which is mainly and the main transformer winding, clip and so on factors
Q:Where is the transformer used?
Transformers are suitable for applications where the voltage level is to be changed Need to change the impedance to match the front and rear impedance of the occasion It is necessary to increase the current supply as a booster
Q:How to use transformer 10 in DC circuit
DC-DC converter can be used, its working principle is: the input DC voltage through the oscillator into high-frequency AC, and then by the high-frequency transformer boost, and then rectification to get the required DC voltage.
Q:Transformer tap adjustment there are several ways? What are the advantages and disadvantages?
1, no excitation adjustment or no taps. 2, with taps. Their advantages and disadvantages are as follows: 1, no taps: taps when the transformer must be shut down after the power, the advantages of safe and reliable, but the disadvantage is to adjust inconvenient, and often because the tap position can not meet the needs of less. 2, with taps Advantages: easy to adjust, do not have to turn off the transformer power can be adjusted, and the general tap position more easily meet the requirements. Disadvantages: due to load adjustment prone to problems, high cost, compared with the same capacity transformer volume, taps device maintenance needs a long time to blackout.
Q:What is the difference between the main transformer and the transformer used?
Selection of main transformers Main transformer is mainly used for electrical system power supply, the general capacity of large, to ensure the reliability of electrical system power supply, improve the system impact resistance. 1, the number of the main transformer: In order to ensure the reliability of power supply, substation should be installed in general two main transformer. 2, the main transformer winding connection: 110KV using a direct grounding neutral point effective grounding system, using star wiring. If necessary, the use of triangular wiring by arc-suppression coil connected to the use of high-pressure side of the change. 35KV using arc suppression coil neutral point non-effective grounding system grounding point, the use of star wiring. 10KV generally use unattached system 3, the choice of the main transformer winding: China 110KV and above voltage transformer winding are used star wiring, 35KV also uses star wiring, 35KV following voltage transformer windings are triangular connection. 4, the choice of main transformer capacity: the main transformer capacity is generally based on substation built 5 to 10 years of planning load selection and take into account the late 10 to 20 years of load development, when a transformer outage, the remaining transformer capacity should Can guarantee 70% of the total load. The choice of choice Used to change the main power supply system, the capacity according to their own distribution load to choose. The number of units used to consider the general standby power supply, when there are two used when the variable, the use of single bus segment wiring, usually run to limit the scope of failure to improve the reliability of power supply. The power system uses 380 / 220V neutral point directly grounded three-phase four-wire system, power and lighting combined with a power supply.
Q:What is the maximum current of the 800KVA transformer? What is the current? Is how to calculate, ask you master
10KV / 0.4KV, 800KVA Transformer rated current is: High pressure side, I = 800 / (1.732 * 10) = 46.2A Low pressure side, I = 800 / (1.732 * 0.4) = 1154.7A Low side of the economic current is about: 1154.7 * 70% = 808.3A

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