what is the difference between capacitive voltage
transformer & inductive voltage transformer.
Answer Posted / sudipta
A capacitor voltage transformer (CVT), or capacitance coupled voltage transformer (CCVT) is a transformer used in power systems to step down extra high voltage signals and provide a low voltage signal, for measurement or to operate a protective relay. In its most basic form the device consists of three parts: two capacitors across which the transmission line signal is split, an inductive element to tune the device to the line frequency, and a transformer to isolate and further step down the voltage for the instrumentation or protective relay. The device has at least four terminals: a terminal for connection to the high voltage signal, a ground terminal, and two secondary terminals which connect to the instrumentation or protective relay. CVTs are typically single-phase devices used for measuring voltages in excess of one hundred kilovolts where the use of wound primary voltage transformers would be uneconomical. In practice, capacitor C1 is often constructed as a stack of smaller capacitors connected in series. This provides a large voltage drop across C1 and a relatively small voltage drop across C2.
The CVT is also useful in communication systems. CVTs in combination with wave traps are used for filtering high frequency communication signals from power frequency. This forms a carrier communication network throughout the transmission network.
Is This Answer Correct ? | 10 Yes | 3 No |
Post New Answer View All Answers
What is pole of the system?
How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).
Why we are use dol starter up to 10 hp
How to see the inductance in a transmission lines
Comment on the working principle of operation of a single-phase transformer.
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com
what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?
what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker
What is the type of earth fault protection used in battery? explain.
Why is the starting current high in dc motor?
Why slip ring ind. motor power consumption is low compare to induction motor .same 90 kw motor used same load output
When and where resistance earthing is used ? How to calculate the time constant for earth fault
is ac supply can store
How to know th details about an electrical Drawing ? Please mention the easy method.