For current signals the correction factors will cause a not insignificant impact on the
reported values at low currents. The correction factors are +2.4% and -3.6 degrees at
signal levels below 5% of set base current, +0.6% and -1.12 degrees at signal level
30% of set base current and 0% and -0.44 degrees at signal levels above 100% of set
base current. Between the calibration points 5%, 30% and 100% of set base current,
linear interpolation is used. Since the output from the Power measurement function is
used as an input for the Energy measuring function (ETPMMTR) the above described
impact will also be valid for the output values for ETPMMTR.
17.3.4 Function block
The function blocks are not represented in the configuration tool. The
signals appear only in the SMT tool when merging units (MU) are
included in the configuration with the function selector tool. In the SMT
tool they can be mapped to the desired virtual input (SMAI) of the IED
and used internally in the configuration.
17.3.5 Output signals
Table 620: MU1_4I_4U Output signals
Name
Type Description
I1 STRING Analogue input I1
I2 STRING Analogue input I2
I3 STRING Analogue input I3
I4 STRING Analogue input I4
V1 STRING Analogue input U1
V2 STRING Analogue input U2
V3 STRING Analogue input U3
V4 STRING Analogue input U4
MUDATA BOOLEAN Fatal error, serious data loss
SYNCH BOOLEAN MU clock synchronized to same clock as IED
SMPLLOST BOOLEAN Sample lost
MUSYNCH BOOLEAN Synchronization lost in MU
TESTMODE BOOLEAN MU in test mode
1MRK505222-UUS C Section 17
Station communication
1005
Technical reference manual
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