GE F650 Instruction Manual page 312

5 SETTINGS 5.11 IEC 61850 CONFIGURATION
Figure 5–61: LD NAME CONFIGURATION
MMXU parameters:
The MMXU deadband settings represent the deadband values used to determine when updating the MMXU.mag. and
.cVal. values from the associated .instmag. and .instcVal. values.
The .mag. and .cVal. values are used for the IEC 61850 buffered and unbuffered reports. These settings correspond to the
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associated .db data items in the CF functional constraint of the MMXU logical node, as per the IEC 61850 standard.
According to IEC 61850-7-3, the db values will represent the percentage of difference between the maximum and the
minimum in units of 0.00%. Thus, it is important to know the maximum value for each MMXU measured quantity, since this
represents the 100.00% value for the deadband. The minimum value for all quantities is 0; the maximum values are as
follows:
A value of 1000 represent the 1% of the scale.
The minimum and maximum main values (secondary) are:
-For Current 0 to 160 A
-For Voltage 0 to 300 V
-For frequency 20 to 70 Hz
GEK-106310AB F650 Digital Bay Controller 5-165