GE T60 Instruction Manual page 544

TRANSDUCER INPUTS/OUTPUTS
Settings
DCMA OUTPUT F1 SOURCE
(FlexAnalog parameters) such as power, current amplitude, voltage amplitude, power factor, etc. can be configured as
sources driving DCmA outputs. See Appendix A for a list of FlexAnalog parameters.
DCMA OUTPUT F1 RANGE
5
to work with different ranges. The three most commonly used output ranges are available.
DCMA OUTPUT F1 MIN VAL
used to control the mapping between an internal analog value and the output current. The setting is entered in per-unit
values. The base units are defined in the same manner as the FlexElement base units.
DCMA OUTPUT F1 MAX VAL
is used to control the mapping between an internal analog value and the output current. The setting is entered in per-unit
values. The base units are defined in the same manner as the FlexElement base units.
The
DCMA OUTPUT F1 MIN VAL
the
DCMA OUTPUT F1 SOURCE
Three application examples follow.
Example: Power monitoring
A three phase active power on a 13.8 kV system measured via UR-series relay source 1 is to be monitored by the DCmA H1
output of the range of –1 to 1 mA. The following settings are applied on the relay: CT ratio = 1200:5, VT secondary 115, VT
connection is delta, and VT ratio = 120. The nominal current is 800 A primary and the nominal power factor is 0.90. The
power is to be monitored in both importing and exporting directions and allow for 20% overload compared to the nominal.
The nominal three-phase power is:
The three-phase power with 20% overload margin is:
5-362
Figure 5-214: DCmA output characteristic
— This setting specifies an internal analog value to drive the analog output. Actual values
— This setting allows selection of the output range. Each DCmA channel can be set independently
— This setting allows setting the minimum limit for the signal that drives the output. This setting is
— This setting allows setting the maximum limit for the signal that drives the output. This setting
and
DCMA OUTPUT F1 MAX VAL
is set to FlexAnalog value based on power factor measurement).
settings are ignored for power factor base units (i.e. if
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Eq. 5-64
Eq. 5-65