CHAPTER 5: SETTINGS PRODUCT SETUP
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5-87
5
Figure 5-37: IEC 61850 Real Time Clock
TmClkLTMS1.TmnsDelta.db
Range: 0.000 to 100.000 %
Default: 0.000 %
This setting is a deadband setting and is used by the relay to determine when to update the "mag" and "cVal" values
from the associated "instMag" and "instCVal" values. The value shall represent the percentage of difference between
maximum and minimum in units of 0.001%. The minimum and maximum values for TmnsDelta data object are
-500000000 ns and 500000000 ns respectively and for example, a setting value of 0.002% results in the dead banded
value of (500000000 - (-500000000)) * 0.002 / 100 = 20000 ns. The default setting value of 0.000% does not update the
"mag" and "cVal" values.
Deadband settings
A deadband is a range in which no action occurs, usually expressed as a percentage.
The IEC 61850 panels contain hundreds of deadband settings, such as in the following panels: Product Setup > Real Time
Clock, FlexLogic, Control Elements, and GGIO4. Each panel is not outlined here.
Deadband setting names all end either with "DB" or .db. As they all work the same way, but each on a different analog
value, a single description applicable to all deadband settings is given here. The analog value that each deadband setting
applies is usually obvious from the name of the setting. However, a tabulation of the analog values and their associated
deadband setting can be found in the UR Family Communications Guide.
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