Sel 121 manual

The SEL-121G relay simultaneously provides high-speed and time delayed protection for transmission, subtransmission, and distribution lines. A 32-bit Relay Word The SEL-221F and SEL-121F Relays are designed to protect transmission, MTA setting determines fault direction (See Figure 2.2 of the Instruction Manual). SEL-221F and SEL-121F Phase and Ground Distance Relay, Directional Ground Relay, Synchronism Checking Relay, Reclosing Relay, Fault Locator. Manual ID:. This manual provides a description of MiCOM P120, P121, P122 and P123 functions and settings. threshold to the "Log Sel" input (refer to Inputs menu).SEL-411L Relay. Protection Manual. Protection and. Automation System. Instruction Manual. Protection Manual. *PM411L-02-NB* Our database is updated regularly for new manuals. SEL-121 F SEL-121 F-1 SEL-121F-8 PHASE AND GROUND DISTANCE RELAY GROUND· DIRECTIONAL Manual ID:. The SEL-221F instruction manual is written for fault locations in terms of miles. The SEL relay instruction manuals are written for standard ABC phase The English language manual is the only approved SEL manual. an SEL-121F Relay, residual current in rms amps is displayed following the phase currents. SEL-221F relays pdf manual download. Also for: Sel-221f-1. Page 121 66.4 V or 115 V . The PTR selected for this l - n l - l example is 2000:1.