What is CVT in computer?
1. Constant Voltage Transformer (C.V.T) : It is an instrument used to protect our electronic devices from voltage surges and spikes. It is a kind of magnetic transformer with a capacitor connected across the secondary winding of the transformer.
What are the applications of voltage transformer?
Voltage and potential transformers can be used with voltmeters for voltage measurements, or with current transformers for wattmeter or watt-hour meter measurements. Voltage transformers and potential transformers are also used to operate protective relays and devices, and in many other applications.
Which transformer is used for constant supply current?
Constant Voltage Transformer (CVT) or Ferroresonant Transformer (Ferro) is a non-linear transformer, which passively provides a regulated voltage output through an electromagnetic phenomenon called ferroresonance (where the term ferroresonant transformer was derived).
What is a constant transformer?
Constant voltage transformers (CVTs), or ferroresonant transformers, produce a constant secondary (output) voltage for varying primary (input) voltages within a certain range.
What is the working principle of constant voltage transformer?
Working Principle The CVT is non – linear transformer and works on Ferro – resonance principle. The transformer operates in the magnetic saturation region as per ferro – resonance principle therefore if there is any change in the input voltage, magnetic flux does not change and output voltage remains constant.
Why transformer is a constant power device?
The power transformer is a constant flux device because it follows Lenz’s law, for every change in flux density caused by loading on secondary it will draw the magnetizing current proportionately from primary. So, the net flux in the core is always constant.
Which transformer is used for radar application?
Large pulse transformers are mainly used in radar systems to deliver 50 to100 MW of power at 200 to 300 kV in a few microseconds.
What are the types of voltage transformer?
There are three primary types of voltage transformers (VT): electromagnetic, capacitor, and optical. The electromagnetic voltage transformer is a wire-wound transformer.
Why are potential transformers used?
A potential transformer (P.T.) is an instrument transformer which is used for the protection and measurement purposes in the power systems. A potential transformer is mainly used to measure high alternating voltage in a power system.
How do constant voltage transformers work?
The CVT (ferro) uses the unique principle of ferroresonance: operation of a transformer in the region of magnetic saturation. In the saturation region of the curve (red), a large change in input voltage results in a small change in output voltage. …
What is a constant voltage transformer?
CVT-Constant Voltage Transformer. With the popularisation of PCs, the constant voltage transformers (CVTs) have also become equally popular. The CVT is simply a magnetic transformer of a special construction that has a capacitor connected across the secondary winding of the transformer.
How sensitive is the output of a constant voltage transformer?
Output sensitive to frequency variation and varies 1.5% with 1% change in frequency With the popularisation of PCs, the constant voltage transformer (CVTs) have also become equally popular. The CVT is simply a magnetic transformer of a special construction that has a capacitior connected across the secondary winding of the transformer.
What is CVT transformer used for?
CVT is used in tank circuit specially made of high voltage winding and capacitor to deliver uninterrupted average output with unstable input. The Constant Voltage Transformer suppliers in Chennai offer superior quality design and performance.
What is the LC circuit in transformer?
This LC circuit is tuned to resonate at the desired transformer frequency. The consequence is that the secondary part of the transformer runs saturated and the output voltage is constant. Mains voltage sags and surges are automatically corrected by a CVT.