Instrument Transformer Testing

What are Instrument Transformers and their importance in the protection of the power system:

Instrument transformers (CTs – Current Transformers and PTs – Potential Transformers) can be conventional with a ferromagnetic core or non-conventional, with low-power outputs such as LPITs (Low Power Instrument Transformers) that use alternative technologies to regulate primary current and voltage values for the secondary.

Both play an essential role in the measurement, supervision, and protection of power systems. These devices ensure that high-level current and voltage signals are converted into safe and suitable values, supplying relays, meters, and automation systems with reliable data. The accuracy of these devices is crucial for operational efficiency, asset safety, and the protection of personnel.

The importance of testing Instrument Transformers and the types of tests to be performed:

In this context, testing instrument transformers is fundamental, as it ensures they are operating within regulatory limits, avoiding measurement errors that may compromise system protection, fault detection, and even continuity of energy supply. Regular testing helps identify incipient faults, prevent operational risks, and ensure transmitted data is accurate and reliable.

The types of tests to be carried out may vary depending on whether the instrument transformer is conventional or non-conventional. Tests aim to evaluate parameters such as transformation ratio, saturation curve, winding resistance, and dielectric withstand. More advanced tests may involve evaluating linearity, frequency response, synchronization, and monitoring of Sampled Values.

CONPROVE Solutions for Instrument Transformer Testing:

CONPROVE offers cutting-edge technology solutions to perform tests on both conventional and non-conventional instrument transformers, such as LPITs.

The CE-7012, together with the CTC (Conprove Test Center), provides a wide range of test possibilities in a single device, offering ease of use by automating tests and reports, ensuring high accuracy, and enabling closed-loop testing with LPITs through subscription to Sampled Values frames from Merging Units.

Conprove develops and manufactures a complete line of equipment and software for testing, automation, commissioning, and maintenance of power systems.

Our products meet the needs for protection relay testing, power system simulations, communication protocol analysis, testing according to IEC 61850 standards, among other essential applications for utilities, industries, engineering companies, and educational institutions. With 100% national technology, specialized technical support, and continuous innovation, Conprove is a benchmark in reliable, robust, and high-precision solutions for the power sector.