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CHAPTER 1: INTRODUCTION
Phase CT 3
Ambient air
Ground CT 1
RTD
MOTOR
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 1-1: Functional block diagram
BUS
52
Stator RTDs
Bearing RTDs
LOAD
Table 1-1: ANSI device numbers and functions
ANSI Code
27_1
27P
32
37
37P
38/49T
46
47
48
49
50BF
50G/SG
50L
50N
50P
51N
51P
51R
59_2
59P
DESCRIPTION OF THE 339 MOTOR PROTECTION SYSTEM
27P
27_1
59P
59_2
2
2
2
37
46
48
50P 50N
49T
51R
50G/SG
38
METERING
TRANSIENT RECORDER
EVENT RECORDER
FAULT REPORT
339
MOTOR PROTECTION SYSTEM
61850 Logical Node
Description
psseqPTUV1,
Positive Sequence Undervoltage
psseqPTUV2
phsPTUV1, phsTUV2
Phase Undervoltage
PDOP1, PDOP2
Directional Power
PTUC1
Undercurrent
PDUP1
Underpower
rtdGGIO6
Bearing RTD
Stator/Ambient/Other
RTD Trouble Alarm
unbalPTOC1
Current Unbalance
phsrevPTOV1
Voltage Phase Reversal
accelPTOC1
Acceleration Time
PTTR1
Thermal Protection/Stall Protection
RBRF1
Breaker Failure / Welded Contactor
gndPIOC1
Ground Fault/Sensitive Ground Fault (CBCT)
ldincPTOC1
Load Increase Alarm
ndPIOC1
Neutral Instantaneous Overcurrent
scPIOC1
Short Circuit
ndPTOC1
Neutral Timed Overcurrent
phsPTOC1
Phase Timed Overcurrent
jamPTOC1
Mechanical Jam
ngseqPTOV
Negative Sequence Overvoltage
phsPTOV1, phsPTOV2 Phase Overvoltage
59_2
47
81O 81U
1
1
2
2
32
2
51N
51P
67N
1
1
1
1
1
50L
TRIP
CLOSE
START INHIBIT
86
66
VTFF 50BF
60CTS
896814A4.CDR
START
1–3
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