ANSI Device Numbers

Quick search ANSI standard device numbers and their definition.

Ground Fault Protection Test

Electronic test form for documenting NEC required ground fault protection tests in accordance with NETA standards.

Instrument Transformer Test

Electronic test form for saving instrument transformer test data.

Loss of Excitation

Calculate useful values for testing GE & SEL generator protection relays.

Meter Settings Test

Electronic test form for saving multi-function metering tests.

Percent Error Calculator

Calculate percent error with calibrated and actual results.

Protective Relay Terms & Definitions

Over 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 Calculator

Calculate the protection trip time (TOC/IDMT) according to IEC 60255 and IEEE C37.112-1996 protection curves.