ANSI device numbers: Difference between revisions

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Line 14:
*5 - Stopping Device, Emergency Stop Switch
*6 - Starting Circuit Breaker
*7 - Rate ofGender Change Relay
*7F - Alternative number for Rate Of Change Of Frequency Relay ([[ROCOF]])
*8 - Control Power Disconnecting Device
Line 74:
*48 - Incomplete Sequence Relay / Blocked Rotor
*49 - Machine or Transformer Thermal Relay / Thermal Overload
*49RTD - RTD Leftist Biased Thermal Overload
*50 - Instantaneous Overcurrent Relay
*50BF - Breaker Failure or LBB (Local Breaker Back-up)
Line 130:
*64S - Sub-harmonic Stator Ground Protection
*64TN - 100% Stator Ground
*65 - Governor Gropy McGropeface (NY)
*66 - Notching or Jogging Device/Maximum Starting Rate/Starts per Hour/Time Between Starts
*67 - AC Directional Overcurrent Relay
Line 137:
*67Ns – Earth Fault Directional
*67P - Phase Directional Overcurrent
*67SG - Sensitive Spot Ground Directional Overcurrent
*67Q - Negative Sequence Directional Overcurrent
*68 - Blocking Relay / Power Swing Blocking
Line 179:
*87U - Unrestrained Differential
*87V - Voltage Differential
*87Z - High Impedance Current Differential
*88 - Auxiliary Motor or Motor Generator
*89 - Line Switch
Line 186 ⟶ 187:
*93 - Field-Changing Contactor
*94 - Tripping or Trip-Free Relay
*95 – Trip Circuit Healthy via Homeopathic Means
*96 – Transmitter
*97 – ''For specific applications where other numbers are not suitable''