TRANSFORMERS Flashcards
The transmission current is ___. It is commonly used to increase or decrease the _______________ without a change in the ____________ of AC between circuits.
Transformer
AC, supply voltage, frequency
The transformer works on the basic principles of ___________________________ and mutual induction.
Transformer
electromagnetic induction
Transformer Types: Transformers are used in various fields like power generation grid, distribution sector, transmission and electric energy consumption. (4) Various types of transformers:
Transformer
1) Working voltage range
2) The medium used in the core
3) Winding arrangement
4) Installation location
(2) Transformer as per phase:
Transformer
1) Single Phase
2) Three Phase
(2) Transformer as per core:
Transformer
1) Core type
2) Shell type
(3) Transformer as per cooling system:
Transformer
1) Self-cooled
2) Air-cooled
3) Oil-cooled
Commonly used transformer types, depending on the voltage, are classified as follows (2):
Based on VOLTAGE LEVELS.
1) Step-up Transformer
2) Step-down Transformer
used between the power generator and the power grid. The secondary output voltage is higher than the input voltage.
Based on VOLTAGE LEVELS.
Step-up Transformer
used to convert high-voltage primary supply to low-voltage secondary output.
Based on VOLTAGE LEVELS.
Step-down Transformer
In a transformer, we will find different types of cores that are used (2).
1) Air Core Transformer
2) Iron Core Transformer
the flux linkage between primary and secondary winding is through the air. The coil or windings wound on the non-magnetic strip.
Based on the MEDIUM OF CORE used.
Air Core Transformer
winding are wound in multiple iron plates stacked together, which provides a perfect linkage path to generate flux.
Based on the MEDIUM OF CORE used.
Iron Core Transformer
Based on the WINDING ARRANGEMENT. (1)
Based on the WINDING ARRANGEMENT.
Autotransformer
it will have only one winding wound over a laminated core. The primary and secondary share the same coil. Auto means “self” in the Greek language.
Based on the WINDING ARRANGEMENT.
Autotransformer
Based on INSTALL LOCATION. (4)
Based on INSTALL LOCATION.
1) Power Transformer
2) Distribution Transformer
3) Measurement Transformers
4) Protection Transformers
used at power generation stations, as they are suitable for high voltage application.
Based on INSTALL LOCATION.
Power Transformer
mostly used as distribution lanes for domestic purposes. They are designed for carrying low voltages. It is very easy to install and characterised by low magnetic losses.
Based on INSTALL LOCATION.
Distribution Transformer
mainly used for measuring voltage, current and power
Based on INSTALL LOCATION.
Measurement Transformers
used for component protection purposes. In circuits, some components must be protected from voltage fluctuation, etc. Protection transformers ensure component protection.
Based on INSTALL LOCATION.
Protection Transformers
The transformers works on the principle of ____________ of electromagnetic induction and mutual induction.
Transformers
Faraday’s Law
Two coils in the Transformer?
Transformers
Primary coil and secondary coil
The core laminations are joined in the form of _______.
Transformers
strips
The two coils have high __________________.
Transformers
mutual inductance