CT Analyzer Testing of Protection and Metering Current Transformers
The CT Analyzer provides fast and cost-effective testing and verification of current transformers for protection and metering applications. It automatically determines all relevant current transformer values and compares the results with the selected IEEE or IEC standard.
The very small and lightweight (< 17.4 lbs/8kg) device offers an outstanding accuracy of 0.02 % in ratio and 1 min in phase angle deviation, making it the most suitable mobile test device for testing metering CTs up to accuracy class 0.15/0.15S.
The latest version of the CT Analyzer has been improved with new hardware accessories and software functions.
- Automatic testing and assessment according to IEEE C57.13 and IEEE C57.13.6
- Saturation test up to 30 kV knee point voltage
- Ratio accuracy to 0.02%
- Automated switch box for multi-ratio current transformers
- Testing of residual magnetism
- Automatic report generation
- Compact and lightweight (< 17.4 lbs/8kg)
Residual Magnetism Measurement
The latest measurement function of the CT Analyzer – the RemAlyzer – allows current transformers to be tested for residual magnetism.
Residual magnetism can occur when current transformers are confronted with very high AC currents or DC offset during fault conditions. Core saturation effects caused by residual magnetism may lead to incorrect operation of the protection relays.
Testing of Multi-Ratio CTs
The CT Analyzer can be extended by the CT SB2 switch box, enabling testing of current transformers with multiple taps, without the need for rewiring. The CT SB2 is a standalone unit, which can be attached to the CT Analyzer. It provides simple, color-coded, six-channel connection possibilities, guaranteeing convenient wiring and avoiding time-consuming and error-prone reconnection.
Due to its wide functionality range and easy handling the CT Analyzer is the ideal solution for on-site testing and calibration of single and multi-tap current transformers for protection and metering purposes.
Download Free Technical Paper:
“Testing CT in Delta Winding – A Case Study,” by Peter Fong, Sequence Instruments, Canada
OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions. The application of OMICRON products allows users to assess the condition of the primary and secondary equipment on their systems with complete confidence. Services offered in the area of consulting, commissioning, testing, diagnostics and training make the product range complete.
Customers in more than 140 countries rely on the company’s ability to supply leading edge technology of excellent quality. Service centers on all continents provide a broad base of knowledge and extraordinary customer support. All of this together with our strong network of sales partners is what has made our company a market leader in the electrical power industry.