GE 845 Instruction Manual page 13

CHAPTER 1: INTRODUCTION
LIGHT
3VTs
AFP
3V_0
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 1-1: Single Line Diagram
Winding 1
3
T.C.
50P-1 50G-1
Tap
Position
51G-1
51P-1
OLTC
Failure
50_2
67G-1
51_2 51N-1
55
50N-1
50BF-1 87G-1
67P
67N
32
Amps
Amps
Harmonics
Calculate
3I_0
Calculate
Restraint
Amps
Amps
RTD input
59_2 59N 59P 24
845
Тransformer Protection System
DESCRIPTION OF THE 845 TRANSFORMER PROTECTION RELAY
Winding 3
Winding 2
50G-2
51G-2
67G-2
51N-2
50N-2
87G-2
Amps
Calculate
3I_0
Calculate Calculate
Operate 2nd and 5th
Amps
Harmonics
Amps
Harmonic
Restraint
50/87
Block
87T
Metering
Transient Recorder
Event Recorder
Fault Report
Data Logger
27P 81U 81O 81R
3 3
3 3
50P-2 50P-3 49
51P-2 51P-3
50BF-2
50BF-3
Amps Amps
Harmonics
Harmonics
27X 59X VTFF 25
894014A3.CDR
1–3