By voltage change
- Step Up-Increases the optional voltage and in this manner the auxiliary current is diminished.
- Step down-Decreases the optional voltage and in this manner auxiliary current is expanded.
- Power transformer – utilized in the middle of the power plant (control age) up to the conveyance arrange. Uncommonly intended to withstand higher pressure and blames in the transmission and age organize.
- Distribution transformer – As it is in the shopper end – exceptionally intended for ceaseless administration, variable load request.
- Phase moving transformer – to control the sum stream of dynamic power between two transmission lines.
- Traction compose transformer – Transformer utilized in the electric rail administrations to supply electric capacity to the rail or cable car from the overhead electrical power link.
- Rectifier transformer or HVDC (High voltage DC transformer) – This sorts of intensity transformer is utilized in high voltage DC organize where there is AC arrange. HVDC transformer is the mix of (a) standard transformer + rectifier circuit(to change over AC to DC) in essential or optional ; or (b)regular transformer + inverter circuit( to change over DC to AC ) in essential or auxiliary.
By kinds of cooling
- Liquid compose – Transformer oil is utilized as a di-electric medium and furthermore as a cooling medium. The transformer center is submerged in the transformer oil. This kinds of transformer is of ease with a detriment of ecological effect (transformer oil isn’t condition agreeable) and plausibility of flame risk.
- Dry compose transformer – Aluminum and tar is utilized as the auxiliary material in dry sort transformer. Both these material has high di-electric quality and furthermore self-cooling property. To limit natural pollution and fire danger, clients are determining dry-type transformers all the more as often as possible. Additionally there is less space required, less polite work is required. Dry compose transformers are exorbitant.