250 kva transformer ultimate purchasing guide

A 250 kva transformer references to a 250 kva power distribution transformer. It could step up voltage to transmit electricity in solar or wind power system or step down voltage to distribute electricity for residential, commercial, industrial, and agricultural usage.

Conso Electrical Science and Technology Co., Ltd is an expert manufacturing corporation to produce 250 kva transformers for State Power Grid of China, and 250 kva compact substations and 250 kva pad mounted transformers to urban construction corporation. The company also produce 10 to 35 kv vacuum circuit breaker as a component on compact substations or to oversea clients.

Types of 250 kva transformer.

In Conso Electrical, a 250 kva transformer is one of the main product. Conso electrical mainly produce 250 kva cast resin dry type transformer, 250 kva oil immersed transformer, and 250 kva pad mounted transformer. The following is the characteristics of each 250 kva transformers:

1.250 kva oil immersed transformers is one of the type transformer, which commonly show up in outdoors. Compare with the 250 kva cast resin transformer, the 250 kva oil immersed transformer has a benefit on material costs and the multiple installation method. It could be a pad mounted transformer or a pole mounted transformer. However, the 250 kva oil immersed transformer need to change the insulated mineral oil regularly. It might cause to pollution if mineral oil seep into ground.

The pole mounted transformer is a perfect solution for a village or a town where the population is sparse. It is because a pole mounted substation is convenient to deliver and install.

2.250 kva cast resin transformers can fit the special demand on fire protection, such as railway station, shopping mall, and hospital. The advantage is from the insulation material, which is fireproof to make the 250 kva transformer free from maintenance. Ever more, it has a similar performance between a 250 kva copper cast resin transformer and a 250 kva aluminum oil immersed transformer. However, it also because of the insulation material. Noise level is one of the extra considerations to drive material costs, since a part of core is exposed to air. And a 250 kva cast resin transformer need an extra protection cover to work in outdoors.

3.250 kva pad mounted transformers normally is a 250 kva oil immersed transformer is combined with control unit and capacity bank unit. Since the incoming and out-coming cables connect through the underground. A 250 kva pad mounted is more fit-able on densely populated areas such as downtown, city park, and central business district.

How much power could a 250 kva transformer supply?

A 250 kva transformer could support 250 kva electricity totally, but it does not mean users could use 250 kW power from a 250 kva transformer. In the AC circuit, it has a phase difference between the voltage and current, because the widely application of power inductor and capacity on motor driver, uninterrupted power supply, and protection relay. It causes the 250 kva electricity cannot transform to other types of energy completely, because some part of electricity is used to keep the stable of voltage and current. To ensure the quality of power gird, the power factor cannot be lower than 0.9 in most counties and areas. Thus, the totally active power of a 250 kva transformer could support is 225 kW.

In additional, the energy consumption would be in a lower range when the 250 kva transformer runs in 50% to 80% loading rate. More over, the active service life would be longer in the loading rate range.

Tips before purchasing a 250 kva transformer.

1.The following information is necessary to provide:

(1)Rated capacity;

(2)Rated frequency;

(3)Input and output voltage;

(4)Vector group and impedance (if parallel connection )

2.The following specifications drives the costs of a 250 kva transformer significantly:

(1)No loading loss and loading loss;

(2)Winding material;

(3)Temperature rise ( for oil immersed transformer);

(4)Noise level (for cast resin transformer);

(5)fire rating (for cast resin transformer).

3.To make sure the specification sheet on contract is match to the requirement of clients.

The Costs of a 250 kva transformer.

Since some technical parameters have a significant impact on the material costs of a 250 kva transformer. The price of a 250 kva transformer is variable as the raw material costs and the different designing. Take a 11/0.415 kv 250 kva copper transformer as an expample:

1.A 250 kva oil immersed transformer could costs $3800;

2.A 250 kva cast resin transformer could costs $4500;

3.A 250 kva pad mounted transformer could costs $ 7000.

Tips after receiving a 250 kva transformer.

The 250 kva transformer needs to install with spare parts, such as surge arrester, cutout fuse, insulator, cables and LV switchgear. Fortunately, the local electricity company might have a professional installation team to support the service. However, it will go smoother if the following factors are checked:

1.Devices and materials on purchasing list are all arrived;

2.No physical damages on your 250 kva transformer, such as the damages on the insulator or oil leakage on the tank.

3.To check both electricity company and the original factory ran factory tests. And the two test report are matched.

4. For oil immersed transformer, it had better be regularly check the level of mineral oil of the 250 kva transformer tank.

The professional 250 kva transformer manufacturer.

Conso Electrical Science and Technology Co., Ltd has more than 15 years to produce 250 kva distribution transformers, and 250 kva compact substation. The company has an experienced team to support an ideal solution to clients. The company produces 250 kva transformers combine with the customized requirement and IEC 60076 standard. Each of finished 250 kva transformers will have a series of factory test. To provide a smooth using experience, some test to oversea market is more serious than domestic market, such as leakage tests.

During the development of 15 years, Conso Electrical manufactures 35 kv distribution transformer to Kenya, 10 kv compact substation to Tajikistan, and 35 kv solar compact substation to Samoa. The company aims to develop a long term relationship with our business partners.