CT Analyzer - Current transformer testing, calibration and assessment
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CT Analyzer Current transformer testing, calibration and assessment

Analyze your current transformer (CT) with the push of a button How CT Analyzer works >> Injects low test signals into secondary side of the CT >> Ratio and phase accuracy >> Determines the CT‘s equivalent circuit parameters >> Identifies all relevant CT performance parameters >> Excitation characteristics (knee points) >> Displays all relevant parameters of the CT and >> Composite error (ALF, ALFi, FS, FSi, Vb) its accuracy at different currents and burdens >> Evaluates the CT according to the selected standard >> Transient CT classes and parameters >> Determines unknown CT nameplate...

Additional features > Simulate different burdens and currents Will a change in the burden influence the accuracy of the measured CT? You can simply have CT Analyzer recalculate results for different burdens and primary currents without measuring again. You can perform ratio measurements of inductive voltage transformers (VTs). > Analyze the effect of CT saturation You can export the measurement results to network simulation software such as RelaySimTest or NetSim in order to analyze the protective system behavior under the effect of CT saturation. You can use the integrated multimeter with...

Current transformer testing from production to maintenance Testing along the production line Factory acceptance testing >> Test CTs before adding the insulation >> Determine the performance of the CTs and evaluate it according to the desired standard (IEC, IEEE or local) >> Verify CTs at various production stages >> Create a CT Analyzer fingerprint measurement >> Achieve a high degree of automation for further on-site comparison >> Use a universal interface to control the CT Analyzer from your very own production line software >> Easily integrate the CT Analyzer into your company network...

>> Quickly and reliably commission any CT >> Verify the CT at (different) operating conditions (all protection and metering classes) >> Recover unknown CT nameplate data >> Compare your results with factory measurements >> Verify correct wiring and connections >> Verify the connection and polarity of the secondary >> Compare your results with previous results wiring along all of the connection points from the CT secondary terminals to the connected instrument, such as a relay or meter >> Create customized reports (digital or printed) >> Analyze the cause of a protection failure based on the...

Advantages and disadvantages of different CT testing methods Method Primary nominal current injection >> Reference transformers and measuring >> Test set for current supply and measurement >> Used in factories, calibration laboratories and on-site mounted on a test truck Primary current injection >> Used during commissioning if high accuracy is not required >> Performed with very high currents (nominal and overcurrent magnitudes) >> Sensitive to transient distortion if line frequency test signals are being used (test truck, high-current source, heavy cables, current box, ...) equipment such...

Secondary voltage injection Model-based testing >> Test set for voltage output and measurement >> Test set for low test signal injection and >> Used during commissioning or maintenance if >> Used in all stages of a CT‘s life a simple check of the CT‘s integrity from the secondary side is sufficient >> Sensitive to transient distortion if line frequency test signals are being used >> Test results must typically be >> One-button test >> Automated assessment evaluated manually >> Special attention has to be given to high-voltage leads and connections

Operating the CT Analyzer: standalone or from a laptop * optionally available transport case Possible operations via front panel and PC >> Assessment standards and limits definition >> Guided test preparation >> Detailed connection diagrams >> Wiring diagrams and step-by-step instructions >> Automatic generation and display of reports >> Customization of the report templates >> Improved multi-ratio CT testing performance 8

Optionally available accessories CT SB2: Switch box for multi-tap CT testing >> Automates your testing of multi-tap CTs >> No need for rewiring >> Measures CTs with up to six taps in one test run >> Determines all of the transformer ratios of all winding combinations automatically >> Separate connections for primary resistance measurement and for the measurement of the secondary burden >> Automatically verifies the cabling before measuring >> Use it separate from, or attached to, CT Analyzer CPOL2: Polarity checker >> Verifies correct polarity along all of the different terminals from the...

Multi-functional transport case >> Heavy duty transport case on wheels >> Protection from dust and water drops >> Protection from mechanical damage >> Suitable for unattended shipping >> Convertible into a workbench >> Extendable lid and pluggable end plates Trolley / Backpack >> Small and lightweight backpack carrying option >> Wheels, extendable handle and shoulder straps >> Basic mechanical protection

Technical specifications CT Analyzer Accuracy error 0.02 % (typical) / 0.05 % (guaranteed) Output voltage error 0.03 % (typical) / 0.1 % (guaranteed) Output current error 0.05 % (typical) / 0.2 % (guaranteed) Output power Phase displacement Mechanical data Winding resistance Environmental conditions Operating temperature Storage temperature Relative humidity 5 % ... 95 % not condensing Power supply Input voltage Certificates from independent test institutes 100 VAC ... 240 VAC KEMA Test Report Permissible input voltage 85 VAC ...264 VAC Wuhan HV Research Test Report Permissible frequency...