CT/PT analyzer-CTPT analyser-CT/VT/CVT analyser

Description

CT/PT analyzer-CTPT analyser-CT/VT/CVT analyser

The need for a comprehensive current transformer testing regime is evident when the alternative is considered: a catastrophically damaging current transformer fault. A fault leading to an open secondary could cause the primary current to overwhelm the insulation, causing the winding to short circuit.A routine series of diagnostics and testing for your current transformer should include CT saturation testing to identify the knee point against IEEE or IEC standards, CT ratio tests to identify that the voltage ratio is within expected parameters and current transformer resistance testing for both the transformer windings and CT insulation resistance testing.Ratio tests under normal load are achieved by comparing voltage applied to the secondary winding against the resulting voltage produced on the primary winding. Current transformer resistance tests inject test voltage to measure the DC current and calculate the resistance with allowance for temperature. Adiradh Energy offers CT/PT Analysers  in India designed  microprocessor controlled variable voltage and current output along with precision instrumentation for automatically testing single and multi-ratio current transformers CT,Voltage transformer VT and capacitive voltage transformers CVT . Megger company  have two models  MVCT and MRCT

MVCT-CT and VT Analyser 

VT and CT analyser   MVCT  test set is a lightweight, robust, portable unit capable of testing both current and voltage transformers. At less than 10Kg the MVCT is a highly portable unit that also offers accuracy in testing. Capable of performing saturation, ratio, polarity, winding resistance, and insulation tests on current transformers, the MVCT can also be used for testing metering and protection class voltage/potential transformers.VT and CT Analyzer MVCT provides a microprocessor controlled variable voltage and current output along with precision instrumentation for automatically testing single and multi-ratio CTs and VT’s. The MVCT makes testing CTs easy. It will directly connect to multi ratio CT’s and perform all tests – saturation, ratio and polarity, winding resistance, and insulation – on all taps with the push of a button and without changing leads. This greatly reduces testing time.

MVCT can be controlled via its large, full color, high resolution, sunlight readable TFT LCD touch screen display. This interface allows the user to perform manual and automatic testing quickly and easily using the manual test screen, or by using pre-constructed test routines. The large color display also permits in VT and CT Analyzer MVCT the user to easily read all pertinent data while the test is being performed and provides the ability to view the results when the test is complete. The unit can also be configured to come without a display and thus be controlled via a laptop utilizing PowerDB software.Knee point voltage :30KV DC ,Output power:300VA,Output voltage AC:300VAC

MVCT will calculate the rated knee point in compliance with either IEEE C57.13.1, IEC 60044-1, IEC 60044-6 or IEC 61869 on both standards as well as of specialized CTs such as PX, TPS, TPX, and TPY. While the saturation test is being performed, the MVCT will plot the CT saturation curve on the STVI display and automatically provide the user with the rated knee point per the desired IEEE or IEC standard

FEATURES AND BENEFITS
■ Direct connection to multi-ratio CT’s – The MVCT will directly connect to all taps on multi-ratio CT’s to eliminate lead changes required to test all inner-winding CT ratios, saturation curves and knee points. The MVCT will test all programmed taps with the push of one button.
■ Full color, high resolution, sunlight readable TFT LCD touch screen – Menu screens and touch screen function buttons are provided to quickly and easily select the desired test function.Tests results can be saved to the unit for download to a memory stick to transfer or print test reports.
■ CT saturation, ratio and polarity, winding resistance, and insulation automated testing – The microprocessor-controlled output fully automates testing of CT’s. This automated testing simplifies CT testing and reduces testing time. Automated testing is accomplished directly on the MVCT or via PowerDB Lite.
■ VT ratio and polarity, secondary winding resistance – The MVCT offers complete testing of VT’s. The MVCT simplifies VT testing and reduces testing time.
■ CT demagnetization – During operation and routine DC winding resistance testing, it is possible for a CT to become magnetized. The MVCT includes an automated CT demagnetization function, which allows determination of accurate Knee Point and ratios thus providing stable, repeatable test results, and reduces test time.
■ Insulation test – The MVCT includes a 500/1000V insulation test system to verify the VT & CT secondary winding and secondary wiring. This insures that the secondary insulation has not degraded and will continue to perform its function during high current faults.
■ Concurrent measurement – The MVCT system can provide concurrent measurement of voltages on all taps during CT saturation, and ratio and polarity testing. This allows the MVCT system to calculate the knee points, and ratios of all windings at the same time thus eliminating the need for multiple tests on a CT. This will drastically reduce testing time. All tests are performed in compliance with IEEE C57.13.1 test guidelines.
■ Test result report – The MVCT offers storage of complete test files in an easy-to-use, versatile format that permits upload to PowerDB Lite, or printing test results using the optional external printer. These options provide a simple, complete, easy way to store over 1000 test results and saturation curves. All test results can be catalogued and stored in the MVCT.