1–4 345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
DESCRIPTION OF THE 345 TRANSFORMER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION
Table 1-1: ANSI device numbers and functions
Table 1-2: Other device functions
ANSI Code 61850 Logical Node Description
49 PTTR1 Thermal Overload
49T rtdGGIO6 Temperature Monitoring
50/87 insPDIF1 Instantaneous Differential
50_2 ngseqPIOC1,
ngseqPIOC2
Negative Sequence Instantaneous Overcurrent
50BF RBRF1, RBRF2 Breaker Failure
50G/SG gndPIOC1, gndPIOC2/
hsePIOC1, hsePIOC2
Ground/Sensitive Ground Instantaneous Overcurrent
50N ndPIOC1, ndPIOC2 Neutral Instantaneous Overcurrent
50P phsPIOC1, phsPIOC2 Phase Instantaneous Overcurrent
51_2 ngseqPTOC1,
ngseqPTOC2
Negative Sequence Timed Overcurrent
51G/SG gndPTOC1, gndPTOC2/
hsePTOC1, hsePTOC2
Ground/Sensitive Ground Timed Overcurrent
51N ndPTOC1, ndPTOC2 Neutral Timed Overcurrent
51P phsPTOC1, phsPTOC2 Phase Timed Overcurrent
86 - Lockout
87G (RGF)
1
1.Restricted Ground Fault is sometimes coded as “87G”, "REF", "87RGF", "87N", "64R",
"64REF", etc.
rgfPDIF1, rgfPDIF2 Restricted Ground Fault
87T pcntPDIF1 Percent Differential
Description
2nd Harmonic Blocking
Ambient Temperature
Breaker Control
Breaker Maintenance
CT Failure Detection
Demand (in metering)
Digital Counters
DNP 3.0 Communications
Event Recorder
Fault Report
IEC 60870-5-103 Communications
IEC 60870-5-104 Communications
IEC 61850 Communications
IEC 61850 GOOSE Communications
Lockout (86)
Logic Elements
Metering: current, frequency, harmonics
Modbus User Map
Modbus RTU Communications
Modbus TCP Communications
Non-volatile Latches
Output Relays
Relay Maintenance
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