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Automatic
- Overcurrent trip time testing
- Overcurrent curve evaluation
- Pick-up/drop-off testing
Overcurrent serves to manually or automatically test overcurrent relays (directional and non-directional). The software displays the characteristic of the relay on a time vs. current diagram. Each test point is defined in this characteristic and then added to a test point list. An assessment is made for each test point, based on the pre-defined tolerance for the trip time.
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Key Features
- Assessment for each test point
- Automated testing
- Characteristic for zero and negative sequence
- Definition of a test point sequence
- Testing of the starting characteristic/automatic assessment
- Testing with or without load current
- Automatic reporting
Four different characteristics can be set for each relay: line to earth fault, line to line fault, zero sequence, and negative sequence.
The time characteristics or curves can either be based on a user-defined current vs. time table or a variety of pre-defined relay characteristics. The relay characteristics available from the OMICRON templates are: standard inverse curves as defined by IEC 255-4 (BS 142) and relay specific curves based on the IEEE standard formula (PC37.112).
OMICRON´s relay interface (XRIO) allows importing and exporting of relay data. Test automation is supported by a simple test point definition in a user-defined test point list. A graphical user interface displays the output values in the vector diagram.