Dcma Outputs - GE L60 Instruction Manual

Line phase comparison system, ur series
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5.8 TRANSDUCER INPUTS AND OUTPUTS

PATH: SETTINGS
TRANSDUCER I/O
 DCMA OUTPUT H1
Hardware and software is provided to generate dcmA signals that allow interfacing with external equipment. Specific hard-
ware details are contained in chapter 3. The dcmA output channels are arranged in a manner similar to transducer input or
CT and VT channels. The user configures individual channels with the settings shown below.
The channels are arranged in sub-modules of two channels, numbered 1 through 8 from top to bottom. On power-up, the
relay automatically generates configuration settings for every channel, based on the order code, in the same manner used
for CTs and VTs. Each channel is assigned a slot letter followed by the row number, 1 through 8 inclusive, which is used as
the channel number.
Both the output range and a signal driving a given output are user-programmable via the following settings menu (an exam-
ple for channel M5 is shown).
5
The relay checks the driving signal (x in equations below) for the minimum and maximum limits, and subsequently re-
scales so the limits defined as
ing equation is applied:
where: x is a driving signal specified by the
I
and I
min
max
k is a scaling constant calculated as:
The feature is intentionally inhibited if the
< 0.1 pu. The resulting characteristic is illustrated in the following figure.
VAL
5-288


DCMA OUTPUTS

DCMA OUTPUT H1
SOURCE: Off
DCMA OUTPUT H1
MESSAGE
RANGE: –1 to 1 mA
DCMA OUTPUT H1
MESSAGE
MIN VAL: 0.000 pu
DCMA OUTPUT H1
MESSAGE
MAX VAL: 1.000 pu
and
MIN VAL
MAX VAL
I
if x
min
I
if x
I
=
max
out
(
k x
MIN VAL
SOURCE
are defined by the
setting
RANGE
------------------------------------------------ -
k
=
MAX VAL
MAX VAL
L60 Line Phase Comparison System
DCMA OUTPUT H1(W8)
Range: Off, any analog actual value parameter
Range: –1 to 1 mA, 0 to 1 mA, 4 to 20 mA
Range: –90.000 to 90.000 pu in steps of 0.001
Range: –90.000 to 90.000 pu in steps of 0.001
match the output range of the hardware defined as
<
MIN VAL
>
MAX VAL
)
I
otherwise
+
min
setting
I
I
max
min
MIN VAL
and
settings are entered incorrectly, e.g. when
MIN VAL
5 SETTINGS
5.8.3 DCMA OUTPUTS
. The follow-
RANGE
(EQ 5.32)
(EQ 5.33)
MAX VAL
MIN
GE Multilin

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