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A revolution in current transformer testing | CT Analyzer OMICRON ELECTRONICS FRANCE

A revolution in current transformer testing | CT Analyzer

Calibration device

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The CT Analyzer automatically determines all relevant current transformer values and compares the results with the selected standard. The device evaluates the current transformer as per the IEC or IEEE standard within seconds with the push of a button.

It facilitates fast and economical on-site testing and calibration of metering and protection current transformers. Manufacturers of current transformers, high voltage transformers and switchgear also use the CT Analyzer for tests during development and production.

The CT SB2 switch box is available as an accessory to the CT Analyzer for automated testing of current transformers with multiple taps, without the need for complex and time-consuming rewiring.

As it is used to feed protective relays, the CT must be accurate during normal and fault conditions. Failures in transformation could lead to misoperation of the relay along with unwanted and costly outages.

To test CTs according to the requirements of modern protection systems, it is compulsory to consider the CT performance at rated frequency for normal and overcurrent operation. Also transient components and auto-reclosure systems must be considered.

Metering CTs must provide high accuracy up to class 0.1 to guarantee correct metering and billing. It is therefore essential to test and calibrate the metering CT, as the accuracy of the metering chain depends on the accuracy of the CT feeding the meter. In contrast to protection CTs, metering CTs should go into saturation beyond the nominal primary current level to protect the connected metering equipment.

The CT Analyzer is the most complete and easy-to-use 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 in labs and on site in power system grids. Manufacturers, utilities, service providers and other CT operators use the CT Analyzer in production, labs, test fields, and on site.

 


Ratio 1 ... 2000 : 0.02 % (typical) / 0.05 % (guaranteed) Ratio 2000 ... 5000 : 0.03 % (typical) / 0.1 % (guaranteed) Ratio 5000 ... 10000 : 0.05 % (typical) / 0.2 % (guaranteed) Resolution : 0.1 min Accuracy : 1 min (typical) / 3 min (guaranteed) Resolution : 1 mΩ Input voltage : 100 VAC ... 240 VAC Permissible input voltage : 85 VAC ...264 VAC Frequency : 50 / 60 Hz Permissible frequency : 45 Hz ... 65 Hz
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