Course description
In Voltage Transformers, you'll learn ...
- The primary functions of a voltage transformer
- How to calculate voltage transformer measuring error
- Standard rated burden values and accuracy classes
- Comparison of Instrument Voltage Transformers (IVT) and Capacitance Voltage Transformers (CVT)
Overview
Credit: 2 PDH
Length: 36 pages
There are two types of voltage transformers: magnetic voltage transformers (VT) and capacitive voltage transformers (CVT). Magnetic voltage transformers are most economical for voltages up to about 145 kV, whereas capacitive voltage transformers are better suited for voltages higher than 145 kV.
A CVT can also be used together with Power Line Carrier (PLC) devices that are used for communication over high voltage transmission circuits. Voltage transformers are in most situations connected between phase and ground. The standard that describes voltage transformers in detail is IEC 186. The main functions of voltage transformers are:
- To transform voltages from a high value to a value that can be easily handled by protection relays and instruments
- To insulate the metering circuit from the primary high voltage
- To give standardization possibilities for instruments and protection relays to a few rated voltages
This course is suitable for engineers with a desire to understand the fundamental theory and operating principles of voltage transformers. Presented details cover basic engineering laws, measuring error, voltage factor, burden and accuracy class, non-linear burdens, different voltage transformer winding connections, Ferro resonance and specific applications for protection schemes.
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Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 24 questions. PDH credits are not awarded until the course is completed and quiz is passed.
Training content
This course teaches the following specific knowledge and skills:
- Basic voltage transformer theory
- Measuring error
- Voltage factor
- Burden and accuracy classes
- Different voltage transformer winding connections
- Ferro resonance
- Specific applications for different protection schemes
Costs
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