GE Multilin 350 Series Instruction Manual

Also see for ML Series 350: Communications manual User manual Communications manual Instruction manual

CHAPTER 3: INTERFACES FRONT CONTROL PANEL INTERFACE350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–5The ESCAPE key is also dual purpose. It is used to exit the sub-pages and to cancel asetpoint change. The MESSAGE ◄ key can also be used to exit sub-pages and to cancelsetpoint changes.The VALUE keys are used to scroll through the possible choices of an enumerated setpoint.They also decrement and increment numerical setpoints.The RESET key resets any latched conditions that are not currently active. This includesresetting latched output relays, latched Trip LEDs, breaker operation failure, and trip / closecoil failures. The Autoreclose Scheme is also reset with the shot counter being returned tozero and the lockout condition being cleared.The MESSAGE ▲ and MESSAGE ▼ keys scroll through any active conditions in the relay.Diagnostic messages are displayed indicating the state of protection and monitoringelements that are picked up, operating, or latched.3.1.4 LED status indicators• IN SERVICE: GreenThis LED will be continuously “ON”, when the relay is set to “Ready” under S1 RELAYSETUP/INSTALLATION/RELAY STATUS, and no major self-test errors have beendetected.• TROUBLE: AmberThis LED will turn “ON”, when the relay is not programmed (Not Ready) state under S1RELAY SETUP/INSTALLATION/RELAY STATUS, or upon detection of a major self-testerror. The relay will turn back to “IN-SERVICE” if no major self-test error is present.• SETPOINT GROUP 1, 2: GreenThese LEDs indicate the group of active protection elements. If setpoint group 1 is litgreen, only the protection elements under group 1 will be active. The protectionelements from group 2 will be inactive. The settings for each protection element canbe edited and displayed regardless of the active group.• TRIP: RedThis indicator turns on when the relay detects a fault and sends a trip command to thetrip output relay. The LED will reset by initiating a reset command from either theRESET pushbutton Breaker Control, or communications; in all cases after the faultcondition has cleared.• ALARM: AmberThis LED will flash upon detection of an alarm condition, with element functionsselected as “alarm”. The LED will automatically turn off if the alarm condition clears.The LED will remain steady “ON”, if the function of the operated protection wasselected as "latched alarm".• PICKUP: AmberThis indicator will light ON upon pickup condition generated by any of the relayfeatures. The indicator will turn off if no pickup condition is detected.• BREAKER OPEN: Red/Green – programmableWhen the breaker is open, this indicator will be on continuously.• BREAKER CLOSED: Red/Green – programmableWhen the breaker is closed, this indicator will be on continuously.Breaker status indication is based on the breaker’s 52a and 52b contacts. With bothcontacts wired to the relay, closed breaker status is determined by closed 52a contactand opened 52b contact. Visa-versa the open breaker status is determined by opened