Overcurrent tests are essential to ensure the reliability and performance of protection relays in power systems. To make this process faster, safer, and more comprehensive, Conprove developed Overcurrent Software—a solution that automates tests, analyzes curves, and validates protection-function behavior quickly and with high precision.
Designed for protection, automation, and maintenance professionals, the software supports engineers and technicians by integrating advanced generation, measurement, and analysis features—delivered through an intuitive interface built for practical use in the field or in the lab.
Automated testing for overcurrent functions
Overcurrent Software performs full tests for key functions used in modern relays, including:
- 46 – Negative-sequence overcurrent
- 50/51 – Phase instantaneous and time overcurrent
- 50G/51G – Ground overcurrent with restriction
- 50N/51N – Neutral overcurrent
- PTOC/PIOC – IEC 61850 overcurrent functions
With simple settings, you can configure:
- Function pickup and drop-out
- Operating times
- Phase and neutral directionality
- Dynamic behavior under multiple scenarios
These tests ensure the relay is correctly calibrated and that its operation matches the settings defined for the system.
Full flexibility in test configuration
Users can freely define which test set channels represent voltages and currents, building customized scenarios according to the relay and application.
In addition, the software enables configuration of:
- Pre‑Simulation 1 and 2
- Post‑Simulation
- Special test conditions
- Real-time interpretation of waveforms and phasors
This flexibility expands testing possibilities and increases realism during validation.
Available tests
Overcurrent Software supports two main test types:
- Pickup/Drop-out Test
Verifies the minimum and maximum currents that make the relay operate or release. - Time Test
Compares the relay’s actual operating time with the expected time from the configured curve.
In both cases, the software displays:
- Waveforms
- Phasors
- Directionality regions
Advanced curve library
One of the main advantages of Overcurrent Software is its extensive curve library, including:
- Standardized curves
- Manufacturer curves
- Typical protection curves
Users can also create their own curves by:
- Entering mathematical equations
- Importing value tables
- Digitizing curves from technical manuals
This flexibility supports any relay type—new or legacy.
Conclusion: precision and speed in a single software
Overcurrent Software is an essential tool for those seeking reliable, complete, and automated overcurrent testing. It covers everything from basic tests to advanced analyses, providing the resources needed to validate settings, verify behavior, and ensure the full performance of protection relays.
