Voltage transformers (VTs) are also classified along with current transformers (CTs) as instrument iransformers. These are shunt connected devices intended to reproduce secondary voltages in fixed proportion to the primary system voltage.
VTs contrast with power, distribution and control transformers (which are also shunt devices) in having very small rated power compared with power, distribution, grounding and control transformers.
Main purpose of a VT is to produce replica of a system voltage which can be used in metering and relaying systems maintain required accuracy over range of voltage.
Two types of voltage transformers are most commonly used in metering, protection and control systems are measuring (metering) voltage transformers and protective (relaying) voltage transformers.
|Title:||Instrument Transformers – Part 2 of 3 Current Voltage Transformers|
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