How much oil does a transformer take?
1-2. 33kV – 400/230V
| Item | Capacity | Oil |
|---|---|---|
| kVA | Liter | |
| 1 | 50 | 165 |
| 2 | 100 | 230 |
| 3 | 160 | 280 |
What is minimum BDV value of transformer oil?
30 KV
Dry and clean oil gives BDV results, better than the oil with moisture content and other conducting impurities. Minimum breakdown voltage of transformer oil or dielectric strength of transformer oil at which this oil can safely be used in transformer, is considered as 30 KV.
What is the grade of transformer oil?
Transformer oils
| PRODUCT NAME | TYPE | CONFORMING TO STANDARD |
|---|---|---|
| TO 1020 60 H | Uninhibited | IEC : 60296 – 2020 Type B Standard Grade oil |
| TO 1020 60 HT | Trace Inhibited | IEC : 60296 – 2020 Type B Standard Grade oil |
| TO 1020 60 HX | Inhibited High Grade | IEC : 60296 – 2020 Type A High Grade Oil |
| TO 1020 AUT | Trace Inhibited | ASTM D 3487- 2016 TYPE I |
How do you check oil level in transformer?
To check the level indicator, remove the outside mechanism for testing without lowering transformer oil. After removing the gauge, hold a magnet on the back of the dial and rotate the magnet; the dial indicator should also rotate. If it fails to respond or if it drags or sticks, replace it.
When should oil filling be started after?
5. When oil filling procedure has to be started? Explanation: When all bushings have been fitted, access covers replaced, and conservator and Buchholz pipework erected, any cooler bank erected and associated pipework installed or tank-mounted radiators fitted, preparations can begin for filling with oil.
What is the purpose of doing BDV test on transformer oil?
BDV test means the Breakdown Voltage Test. This test is performed for verifying the dielectric strength of the oil of the transformer. Dielectric Strength is the maximum capacity to resist the voltage of insulating oil. This test demonstrates the dielectric Strength of Transformer Oil.
What is the BDV value of 33KV transformer?
BDV of a transformer oil used in 33KV/11kv the minimum value is 30Kv/mm,but as per my practical observations on different types of transformers oils ,before filtration and after filtration of oil the BDV is like this.
What kind of oil is used in transformers?
mineral oil
Today, the majority of transformers are still filled with mineral oil. But, other types of oil are becoming more and more popular and there are quite a few different types to choose from. Some alternative fluids have benefits such as high fire and flash points for indoor use or environmentally friendly attributes.
What is viscosity of transformer oil?
High quality transformer oils are normally in the range of 7- 8 mm2/sec at 40°C and even with such low viscosity, they still meet the requirement for flash point (<135°C) from the same standard.
What is Borak 22 used for?
The mineral used mineral oil Borak 22 is examined for different parameters such as, the distance between electrodes and geometry of electrodes. The experiment results concerning the evolution of the breakdown voltage into new oil and another old.
What is the oil level of transformer conservator tank?
As per IEC the conservator design should be considering oil level increment with temperature ranging from -25°C to plus 110°C. The oil level of a transformer conservator tank is not fixed or constant; instead it is a function of the following parameters- Oil temperature of the transformer (average value).
What is a transformer oil level indicator?
Transformer oil level indicators – also known as liquid level indicators or OLIs for short – are a standard piece of equipment on most transformers. Over time, oil leakages lead to a drop in oil level and reduced cooling performance of the transformer.
What happens if the oil level of a transformer is low?
Over time, oil leakages lead to a drop in oil level and reduced cooling performance of the transformer. Having a clear indication of the oil level inside the tank of a transformer, the conservator and in the on-load tap changer provides important information about the condition of the transformer.