500 kva transformer ultimate purchasing guide

500 kva transformer plays an essential role on 10kv power grid transmission and distribution.

Conso Electrical Science and Technology Co., Ltd is a specialized manufacturer in China that has an experienced team to design and produce a 500 kva transformer. The factory has built a series of producing procedure that as the requirement of ISO 9001 quality management system since 2006. the company also designs transformer as the current costs of raw materials such as copper, mineral oil, and CRGO to provide a budget friendly quotation to clients.

What is the category of a 500 kva transformer has?

Classification as the insulation material, the 500 kva transformer has:

1. 500 kva ONAN transformer;

2. 500 kva dry type transformer.

Classification as the installation type, the 500 kva transformer has:

1. 500 kva pole mounted transformer;

2. 500 kva pad mounted transformer.

Classification as input voltage, the 500 kva transformer has:

1. 10 kv 500 kva transformer;

2. 20 kv 500 kva transformer;

3. 35 kv 500 kva transformer.

Classification as the raw material, the 500 kva transformer has:

1. Copper winding 500 kva transformer;

2. Aluminum winding 500 kva transformer;

3. CRGO core 500 kva transformer;

4. Amorphous alloy iron core 500 kva transformer.

What is the meaning of a 500 kva transformer?

500 kva is the apparent power (S) of the transformer. The 500 kva transformer means the total power of the transformer could supply is 500 kva.

How much power could a 500 kva transformer actually supply that is suitable?

apparent power (S) includes active power (P) and reactive power (Q). the The Active power refers to the portion of power actually used to perform useful work in the power gird. It is one of the important indicators to measure the energy conversion efficiency of a circuit. the power factor (cos(φ)) shows the relationship between the apparent power (S) and the active power (P),it appearances like that:

cos(φ)=P/S

The value of power factor could be from 0 to 1. However, the power factor shall be infinitely close to 1 orshall be greater than 0.9in most of countries. Thus, the actual power of a 500 kva transformer is:

P=S*cos(φ)= 500*0.9= 450 kW

The 500 kva transformer will has the energy consumption in running. It occurs when the current pass through the transformer. The energy consumption is inevitable when a 500 kva transformer is running. Fortunately, the value could be relatively lower whenthe load rate (LR) is from 50% to 80%.The actual service life of the 500 kva transformer will reduce, if the 500 kva transformer is full loaded all the running time, and the 500 kva transformer could carry 120% loading within two hours running that will not affects the service life according to the IEC 60076.

Thus, the suitable active power (SP) of a 500 kva could provide that shall be:

SP=S* cos(φ)*LR

Thus, a 500 kva transformer normally could supply 225 kW to 360 kW actually power in the long term basis.

What does the nameplate shall carry on to a 500 kva transformer?

A 500 kva transformer nameplate shall carry the information and specification as below:

1. Product mode number;

2. Rated capacity;

3. Input and output voltage;

4. Vector group;

5. Rated frequency;

6. Energy consumption;

7. Rated current;

8. Manufacture name.

How many amps can a 500 kva transformer can supply?

It depends on the output voltage and the phase number. A 500 kva transformer is three phase transformer according to IEC 60076. To take a 10/0.4 kv three phase transformer as an example, the current of a 500 kva transformer is as below:

The current on the primary side: I=P/(√3*V*cos(φ))=500/(√3*10*1)≈28.90 A;

The current on the secondary side: I=P/(√3*V*cos(φ))=500/(√3*0.4*1)≈722.54 A;

I: rated current;

P: rated capacity;

V: rated voltage;

cos(φ): power factor, take the value as 1.

What is the weight and dimension of a 500 kva transformer?

The weight and dimension of a 500 kva transformer depends on the product specification and the engineering design. the 500 kva transformer manufacture will offer the dimension drawing after the product specification is confirmed. Take a 10/0.4 500kva copper transformer as an example, the dimension could be 1360 mm*870 mm*1330 mm (L*W*H) and the weight could be 1675 kG.

How much copper or aluminum used in a 500 kva transformer?

It depends on the product specification and the engineer design that the weight of copper or aluminum used in a 500 kva transformer. However, temperature rise and transformer energy consumption significantly impacts the raw material taking.

How much does a 500 kvatransformer cost?

Take a 10/0.4 kv copper onan 500 kva transformer as a example, it might be $5600 to $ 7800 in USD;

Take a 10/0.4 kv copper pad mounted transformer as a example, it might be $9000 to $12000 in USD.

How to install a 500 kva transformer?

The local power grid corporation has an engineering installation team to provide the professional service. However, before install your 500 kva transformer, the factor below need to be check:

1.To check the 500 kva transformer run the factory test by local power gird corporation and the original manufacturer.

2. To check the product specification matches to the requirements.

3. To check the 500 kva transformer has no damage in outside looking.

4. To check arriving materials match to your purchasing list. 

How to maintain a 500 kva transformer?

1.  To check whether there is oil leakage, smoke or discharge from components on the outside of the 500 kva transformer.

2.  To check the oil temperature of transformers. The top oil temperature of oil immersed transformers during operation should not exceed 95 ℃.

3.  To inspect and replace fuses on both primary and secondary side.

4.  To Install insulation covers in narrow residential areas and forest areas to protect animals  from accidental electric shock, and the 500 kva transformer from short circuit.

How to purchase a solid quality 500 kva transformer?

1. To check the supplier, if it is a broker or a original manufacturer.

2. To check the manufacturer if has the necessary certification or not, such as type test report and the ISO certification.

3. To check the manufacturer has the necessary producing and testing equipment for 500 kva transformers.

4. To inspect if the required specification of 500 kva transformers write down on the contract.

Conso Electrical Science and Technology Co., Ltd is one of the professional factories to produce 10 kV to 35 kV 500 kva transformers. The manufacturer could have produced 500 kva oil immersed transformer, 500 kva dry type transformer, 500 kva pad mounted transformer and 500 kva compact substation since 2006.

Conso Electrical took factory video in a case that oversea clients is not convenient to have a site visit.

Conso Electrical has a experienced technical team to offer an ideal solution of 500 kva transformers to clients. The company has the ISO9001 quality management certification, ISO14001 environment management certification and ISO45001 occupational health and safety management system certification. And the type test report is authorized by the third party.

Conso electrical has over 15 years producing experience to 500 kva transformers. The company would run factory test for each 500 kva transformers. Meanwhile, conso electrical also will pick a suitable packaging to avoid 500 kva transformers from the damage during shipping.

The specification of a 500 kva transformer is better to know from clients.

 To purchasing a 500 kva transformer, the below information is necessary from clients:

1. Rated capacity;

2. Input and output voltage;

3. Rated frequency;

4. Winding material.

 To purchasing a 500 kva transformer, the below information impact on costs significantly:

1. Temperature rise (standard: 60K/65K);

2. No loading loss and loading loss;

3. Altitude of working environment (standard: less than 1000m above the sea level).

To purchasing a 500 kva transformer, the below information need to know, if it is necessary to parallel connect：

1. Vector group;

2. Tapping method (standard: ±2*2.5%, off-load).