5.5
Date Code 20081022 Instruction Manual SEL-787 Relay
Metering and Monitoring
Metering
=>>MET DIF <Enter>
SEL-787 Date: 01/23/2008 Time: 13:44:35
TRNSFRMR RELAY Time Source: Internal
IOP1 IOP2 IOP3
Operate (pu) 0.59 0.62 0.60
IRT1 IRT2 IRT3
Restraint (pu) 0.29 0.31 0.30
IOP1F2 IOP2F2 IOP3F2
2nd Harmonic (%) 0.33 0.16 0.16
IOP1F4 IOP2F4 IOP3F4
4th Harmonic (%) 0.50 0.32 0.33
IOP1F5 IOP2F5 IOP3F5
5th Harmonic (%) 0.50 0.63 0.49
=>>
Figure 5.3 METER DIF (Differential) Command Report
Thermal Metering
The thermal metering function reports the RTD meter values (see Table 5.3 for
details) and also reports the state of connected RTDs if any have failed (see
Table 5.4 for details).
Figure 5.4 provides an example of the METER T command report.
=>>MET T <Enter>
SEL-787 Date: 11/12/2007 Time: 12:34:14
TRNSFRMR RELAY Time Source: Internal
Ambient RTD 70 C
Max Other RTD 95 C
RTD2 AMB 70 C
RTD3 TEST3 -30 C
RTD5 TEST5 75 C
RTD6 TEST6 90 C
RTD8 TEST8 -10 C
RTD10 TEST10 95 C
RTD11 TEST11 65 C
RTD12 TEST12 open
=>>
Figure 5.4 METER T Command Report With RTDs
Table 5.3 Thermal Meter Values
Relay Option Thermal Values
With External SEL-2600 series RTD
Module
or Internal RTD Option
All RTD Temperatures
Table 5.4 RTD Input Status Messages
Message Status
Open RTD leads open
Short RTD leads shorted
Comm Fail Fiber-optic communications to SEL-2600 series RTD Module have failed
Stat Fail SEL-2600 series RTD Module self-test status failure
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