GE N60 Instruction Manual page 332

CONTROL ELEMENTS
The output integer number is represented by eight FlexLogic operands encoding the input value per the following
convention:
The output operands can be configured to drive relay outputs, such as remote outputs, direct outputs, contact outputs, or
any combination of these, in order to relay the analog quantity to other UR-series IEDs for further processing.
The digitizer averages the signal prior to digitization for increased accuracy. The extra filtering is in effect only under
5
steady-state conditions or during slow changes of the input value. When the input signal changes significantly, the
filtering is removed to maintain the response speed of the element.
For critical applications, ensure the validity of the digitizer input signal to prevent an undesired response of the relaying
system. For example, configuring the VT fuse failure condition when the digitizer uses the voltage signal.
The digitized output value is available as an actual value for testing, troubleshooting, and special applications (see the
ACTUAL VALUES  METERING  DIGITIZERS
DIGITIZER 1 SOURCE
(FlexAnalog parameters) such as power, current amplitude, voltage amplitude, power factor, and so on, can be configured
as the digitizer source. Refer to Appendix A for a complete list of FlexAnalog parameters available for the N60.
— This setting allows setting symmetrical limits for the input signal. The input signal is truncated to an
DIGITIZER 1 LIMIT
interval from –LIMIT to +LIMIT before the effective digitization. The base units are defined in the exact manner as
FlexElements (see the FlexElements section for details).
5-216
Figure 5-109: Digitizer output characteristic
-LIMIT
b 6
–    
N = 1 2 b +
7
out 6
values for details).
— This setting specifies an internal analog value to be digitized. A variety of analog actual values
Figure 5-110: Digitizer logic
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
DIGITIZED
VALUE
127
LIMIT
–127
FULL SCALE
5 4 3 2 1
2 b + 2 b + 2 b + 2 b + 2
5 4 3 2
CHAPTER 5: SETTINGS
SOURCE
842741A2.CDR
0

b + 2 b
1 0
Eq. 5-20