GE F650 Instruction Manual page 435

7.3 IEC 61850 CONFIGURATOR 7 IEC 61850 PROTOCOL
LOGICAL DEVICE NAME
The logical device name is used to identify the IEC 61850 logical device that exists within the F650. This name is
composed of two parts: the IED name setting and the logical device instance. The complete logical device name is the
combination of the two character strings programmed in the IEDNAME and LD INST settings. The default values for these
strings are "GEDevice" and "F650". These values should be changed to reflect a logical naming convention for all IEC
61850 logical devices in the system.
IEC 61850 specifies that valid characters for the IEDNAME are upper and lowercase letters, numbers, and the underscore
(_) character, and the first character in the prefix must be a letter. An example of correct IEDNAME is L11kV_B28, an
incorrect IEDNAME would be 11kV_B28 (IEDNAME must start with letter).
MMXU PARAMETERS (DEADBANDS (DB) OF MEASUREMENT VALUES)
7
Figure 7–12: CONFIGURATION OF DEABANDS FOR MEASUREMENTS
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 associated .db. and dbAng 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 and
dbAng values shall 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 represents the 1% of the scale.
The minimum and maximum main values are:
-For Current:0 to 160 A (secondary values)
-For Voltage:0 to 300 V (secondary values)
7-66 F650 Digital Bay Controller GEK-106310AB