Yes N/A LED 7 Yellow U/V STG-2 TRIP Yes N/A O/V STG-2 TRIP LED 8 Yellow Yes N/A 59ND OV TRIP LED 9 Yellow Yes N/A LED 10 Yellow FUSE FAIL OPTD Yes N/A LED 11 Yellow VT MCB TRIP Yes N/A LED 12 Yellow U/V STG-1 ALARM Yes N/A LED 13 Yellow O/V STG-1 ALARM Yes N/A LED 14 Yellow 46 NEU UBAL O/C ALARM Yes N/A LED 15 Yellow CBF INITIATION OVER CURRENT PROTECTION - (OC4PTOC:1) & (EF4PTOC:1): 51/51N IEC NORM. INV. CURVE: PICK-UP AND DROP OFF TEST: IDMT 51P: 0.48 amp. K= 0.28 Curve: Normal Inverse. IDMT 51N: 0.11 amp. K=0.28 Curve: Normal Inverse. Over Current Relay Earth Fault Relay Current Current (N) R Y B Setting Setting EF4PTOC:1 OC4PTOC:1 OC4PTOC:1 OC4PTOC:1 IThreshold IThreshold (50N) (51N) P/U D/O P/U D/O P/U D/O P/U D/O Amps Amps A A A A A A A A 0.48 A 0.11 A TIMING TEST: Current Setting Current Over Current Relay Earth Fault IThreshold Setting IEC Curves Relay (N) (50N) SEC IThreshold EF4PTOC:1 R Y B OC4PTOC:1 (51N) SEC 2xIset 2xIset IEC NORM. INV. 5xIset 5xIset where Curve Equation:
LED 7 Yellow Yes N/A U/V STG-2 TRIP LED 8 Yellow Yes N/A O/V STG-2 TRIP LED 9 Yellow Yes N/A 59ND OV TRIP LED 10 Yellow Yes N/A FUSE FAIL OPTD LED 11 Yellow Yes N/A VT MCB TRIP LED 12 Yellow Yes N/A U/V STG-1 ALARM LED 13 Yellow Yes N/A O/V STG-1 ALARM LED 14 Yellow Yes N/A 46 NEU UBAL O/C ALARM LED 15 Yellow Yes N/A CBF INITIATION OVER CURRENT PROTECTION - (OC4PTOC:1) & (EF4PTOC:1): 51/51N IEC NORM. INV. CURVE: PICK-UP AND DROP OFF TEST: IDMT 51P: 0.48 amp. K= 0.28 Curve: Normal Inverse. IDMT 51N: 0.11 amp. K=0.28 Curve: Normal Inverse. Current Setting IThreshold (50N) Amps Over Current Relay Current Setting IThreshold (51N) Amps Earth Fault Relay (N) EF4PTOC:1 R OC4PTOC:1 Y OC4PTOC:1 B OC4PTOC:1 P/U A D/O A P/U A D/O A P/U A D/O A P/U A D/O A 0.48 A 0.11 A TIMING TEST: Current Setting IThreshold (50N) SEC OC4PTOC:1 IEC Curves Over Current Relay Current Setting IThreshold (51N) SEC Earth Fault Relay (N) EF4PTOC:1 R Y B 2xIset IEC NORM. INV. 2xIset 5xIset 5xIset Curve Equation: where
abb_rec670_cap_bank_protn.docx