Table of Contents
What is the difference between Level 1 and Level 2 transformer?
Sandeep pointed out that losses of energy efficiency level 1 are equivalent to BEE 3 Star Category, energy efficiency level 2 are equivalent to BEE 4 star category and energy efficiency level 3 are equivalent to 5star category for 3 phase distribution transformer upto 200 KVA transformer for 11KV Class.
What is a Level 2 transformer?
Typically the sites is 1180 energy efficiency level 2 where there are immersions of mineral oil, natural air 11/0.433 – 0.250 KV Distribution Transformers. These energy efficiency level of transformer have been meant for outdoor use in power distribution systems with nominal system voltages.
Is standard for transformer?
This standard was first published in 1962 and covered naturally cooled oil-immersed transformers. The temperature of ambient air and cooling medium oil is as per Indian Environment and tests are conducted accordingly.
IS and IEC standards for transformer?
Standards
| IEC 60038 | IEC standard voltages |
|---|---|
| IEC 60076-2 | Power transformers – Temperature rise for liquid immersed transformers |
| IEC 60076-3 | Power transformers – Insulation levels, dielectric tests and external clearances in air |
| IEC 60076-5 | Power transformers – Ability to withstand short-circuit |
Is standard for transformer losses?
Transformer losses are a combination of core losses and coil losses. These coil losses make up the difference between the 0.5\% losses for the core and range from 1.5\% to 2\% of the total load. Typically, the total losses for a 75 kVA transformer are about 1,000 W at 35\% loading or 1.3\%.
What is the efficiency level of transformer?
Transformers are the most highly efficient electrical devices. Most of the transformers have full load efficiency between 95\% to 98.5\% .
What is the IEC which defines the transformer?
This part of IEC 60076 applies to dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV and at least one winding operating at greater than 1,1 kV. The standard applies to all construction technologies.
What IEC 60146?
IEC 60146-1-1:2009 specifies the requirements for the performance of all semiconductor power converters and semiconductor power switches using controllable and/or non-controllable electronic valve devices.
Which type of loss is more critical for the transformer?
The biggest contributor to no-load losses is hysteresis losses. Hysteresis losses come from the molecules in the core laminations resisting being magnetized and demagnetized by the alternating magnetic field.
Is code a maintenance transformer?
IS 10028-3: Code of practice for selection, installation and maintenance of transformers, Part 3: Maintenance.
https://www.youtube.com/watch?v=2-ciosSwVMc