GE Multilin 350 Series User Manual

1–4 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
DESCRIPTION OF THE 350 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION
Figure 2: Single line diagram
Table 1: Protection functions
898742A1.CDR
350 RELAY
TRIP
BUS
LOAD
3
1
52
CLOSE
50G/
51G
50P 50N
79
50G 51G
22
21
METERING
TRANSIENT RECORDER
EVENT RECORDER
51N51P
50_2
111
49
1
1
27P
59P 27X 59X 59_2 59N 81U 81O
CLP
50BF 79
11111 12 2
MONITORING
BUS VT
67N
67G
1
1
ANSI Device Description
27P Phase Undervoltage
27X Auxiliary Undervoltage
49 Thermal Model
50P Phase Instantaneous Overcurrent
50N Neutral Instantaneous Overcurrent
50G Ground/Sensitive Ground Instantaneous Overcurrent
50BF Breaker Failure
50_2 Negative Sequence Overcurrent
51P Phase Timed Overcurrent
51G Ground Timed Overcurrent
51N Neutral Timed Overcurrent
59P Phase Overvoltage
59X Auxiliary Overvoltage
59N Neutral Overvoltage
59_2 Negative Sequence Overvoltage
67G Ground Directional Element
67N Netural Directional Element
79 Autoreclose
81U Underfrequency
81O Overfrequency
CLP Cold Load Pickup
Courtesy of NationalSwitchgear.com

GE Multilin 350 Series Specifications

General

Brand	GE
Model	Multilin 350 Series
Category	Relays
Language	English