ANSI Device NumbersQuick search ANSI standard device numbers and their definition.
Ground Fault Protection TestElectronic test form for documenting NEC required ground fault protection tests in accordance with NETA standards.
Instrument Transformer TestElectronic test form for saving instrument transformer test data.
Loss of ExcitationCalculate useful values for testing GE & SEL generator protection relays.
Meter Settings TestElectronic test form for saving multi-function metering tests.
Percent Error CalculatorCalculate percent error with calibrated and actual results.
Protective Relay Terms & DefinitionsOver 200 protective relay terms and definitions, compiled from the Institute of Electrical and Electronics Engineers and the National Association of Relay Manufacturers.
Relay TOC/IDMT CalculatorCalculate the protection trip time (TOC/IDMT) according to IEC 60255 and IEEE C37.112-1996 protection curves.
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