The Omicron CT Analyser is a complete testing system for protection and metering CTs according to IEEE and IEC standards. It allows all types of single and multi-ratio current transformers to be tested on-site in power system grids.  It can also be used to calibrate instrument transformers due to its high level of accuracy. It is ideal for usage in the field due to its light weight of just 8 kg, high noise immunity and Automatic assessment according to IEEE and IEC standards. The CT Analyser offers a wide range of measurements, such as CT-ratio and phase-angle accuracy with consideration of nominal and operational burden for various currents, CT winding resistance, CT excitation / saturation (unsaturated and saturated), ALF and FS (direct and indirect), burden impedance and CT residual magnetism within minutes with just one test cycle.

• Automatic assessment according to IEC 60044-6, or IEEE C57.13 up to accuracy class ≥ 0.3
• Determination of ALF/ALFi and FS/FSi, Ts, and composite error for nominal and connected burden
• CT ratio and phase measurement with consideration of nominal and connected secondary burden
• Currents from 1% up to 400 % of the rated value
• Different burdens (full, ½, ¼, ? burden)
• CT winding resistance measurement (primary and secondary)
• CT excitation curve (unsaturated and saturated)
• Saturation characteristic recording
• Direct comparison of excitation curve to a reference curve
• CT phase and polarity check
• Secondary burden measurement
• Automatic demagnetization of the CT after the test
• High level of safety using patented variable frequency method (max. 120 V)
• "Nameplate guesser" function for CTs with unknown data
• Remote control interface
• Simulation of measured data with different burdens and currents
• Knee-point voltage from 1 V up to 30 kV can be measured
• Automatic assessment for accuracy class > 0.1 (inclusive classes defined in the IEEE C57.13.6 standard)
• Measurement of transient behavior of TPS, TPX, TPY and TPZ type CTs
• Determination of the transient dimensioning factor (Ktd)
• Considering Duty (C-O / C-O-C-O) e.g. auto-reclosure system