Relay Code - ANSI - Electrical protections

This app shows the relay codes used in electrical protections according to the ANSI standard. It allows you to add the most consulted relay codes to favorites and share them by mail, WhatsApp, among others. Becoming So in a great tool to read electric plans and electrical protections according to the ANSI standard from your mobile device. 1.- Main Relay Code: 32 - Directional power relay 32L - Low advance power 32N - Wattmetric Zero-Sequence Directional 32P - Directional power 32R - Reverse power 33 - Position switch 34 - Master sequence device 35 - Short circuit device that operates with brushes or sliding ring 36 - Polarization voltage or polarization device 49 - Machine Thermal Relay or Transformer / Thermal Overload 49RTD - RTD polarized thermal overload 50 - Instantaneous overcurrent relay 50BF - Breaker failure 50DD - Current disturbance detector 50EF - End Fault Protection 50G - Instantaneous ground overcurrent 50IG - Instantaneous overcurrent of isolated ground 50LR - Acceleration time 50N - Neutral instantaneous overcurrent 50 NBF - Neutral instantaneous breaker failure 50P - Instantaneous phase overcurrent 50SG - Instant overcurrent of sensitive earth 50SP - Instantaneous split phase current 50_2 - Instantaneous overcurrent of negative sequence 50/27 - Accidental Energization 50/51 - Instantaneous overcurrent / time delay relay 50Ns / 51Ns - Sensitive ground fault protection 50/74 - Ct Trouble 50/87 - Instantaneous Differential 51 - AC time overcurrent relay 51 - Overload 51G - Ground time overcurrent 51LR - AC inverse time overcurrent protection relay (rotor locked) 51N - Neutral time overcurrent 52a - Position of the AC circuit breaker (contact open when the circuit breaker is open) 52b - Position of the AC circuit breaker (contact closed when the circuit breaker is open) 2.- Acronyms: AFD - Electric arc detector CLK - Clock or timing source CLP - Cold load collection DDR - Dynamic disturbance recorder DFR - Digital fault recorder HMI - Human-machine interface HST - Historian LGC - Scheme Logic MET - Measurement of the substation PDC - phasor data concentrator PMU - phasor measurement unit PQM - Energy quality monitor RIO - Remote input / output device RTD - Resistance temperature detector LRSS - Local / remote selector switch VTFF - Vt Fuse failure