GE Multilin 345 - Transformer Protection System - Instruction Manual

CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 345 TRANSFORMER PROTECTION SYSTEM
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–3
Figure 1-1: Functional block diagram
897743A2.CDR
345 RELAY
Metering
Transient Recorder
Event Recorder
Fault Report
Calculate
Restraint Current
Calculate
Differential Currents
Calculate
Harmonics
2nd and 5th
BLOCK
50P
50G
/SG
50G
/SG
51P
51G
/SG
51G
/SG
50BF
51_2
50N
51N
87G
87G
87T
50/87
Winding 2
Winding 1
49
50_2
50P
51P
50BF
51_2
50N
51N
50_2
86
49T