GE 850 - Page 16

1–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION
59N Neutral Overvoltage Y (4) Y (4) Y (4)
59P Phase Overvoltage Y (4) Y (4)
59X Auxiliary Overvoltage Y (2) Y (4)
59_2 Negative Sequence Overvoltage Y (2) Y (4) Y (4)
67G Ground Directional Element Y (1) Y (2)
67SG Sensitive Ground Directional Element Y (1) Y (1)
67N Neutral Directional Element Y (1) Y (4)
67P Phase Directional Element Y (1) Y (4)
67_2 Negative Sequence Directional Element Y (1) Y (2)
79 Automatic Recloser Y (1) Y (2)
81O Overfrequency Y (6) Y (12)
81U Underfrequency Y (6) Y (12)
81R Frequency Rate of Change Y (6) Y (12)
87G Restricted Ground Fault (RGF) Y Y
AFP Arc Flash Protection Y (4) Y (4)
CLP Cold Load Pickup Y (1) Y (2)
I1/12 Broken Conductor Y (1) Y (3)
MTM Automatic Bus Transfer Scheme Y Y
MCB Manual Close Blocking Y Y Y
SOTF Switch on to Fault Y (3)
TGFD Transient Ground Fault Detection Y Y
VTFF Voltage Transformer Fuse Failure Y Y
n/a Fast Underfrequency Y (1) Y (2)
n/a Underfrequency Restoration Y Y
n/a Undervoltage Restoration Y Y
n/a Load Encroachment Y (1) Y (2)
ANSI
Device
Description 850-E
Industrial
850-D
Distribution
850-P
Padmount