GE D90 Plus Instruction Manual page 137

CHAPTER 6: COMMUNICATIONS
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
maximum and 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.
Select the Settings > Communications > IEC 61850 > MMXU Deadbands menu item to
open the MMXU deadbands configuration window.
Figure 102: IEC 61850 MMXU deadband configuration settings
The following settings are available for each of the four MMXU nodes.
Total Watt Deadband
Range: 0.001 to 100.000% in steps of 0.001
Default: 10.000%
This setting specifies the real power deadband value. The maximum value representing
100% of deadband is 46 × phase CT secondary × phase CT ratio × 275 × VT ratio.
Total Var Deadband
Range: 0.001 to 100.000% in steps of 0.001
Default: 10.000%
This setting specifies the reactive power deadband value. The maximum value
representing 100% of deadband is 46 × phase CT secondary × phase CT ratio × 275 × VT
ratio.
Total VA Deadband
Range: 0.001 to 100.000% in steps of 0.001
Default: 10.000%
This setting specifies the apparent power deadband value. The 100% deadband value is
46 × phase CT secondary × phase CT ratio × 275 × VT ratio.
Total Power Factor Deadband
Range: 0.001 to 100.000% in steps of 0.001
Default: 10.000%
This setting specifies the power factor deadband value. The 100% deadband value is 2.
Hz Deadband
Range: 0.001 to 100.000% in steps of 0.001
Default: 10.000%
This setting specifies the frequency deadband value. The 100% deadband value is 90 Hz.
IEC 61850 COMMUNICATIONS
127