Measurements and Recording
P846/EN MR/D
MiCOM P846
(MR) 8-11
MR
e relay are those for the previous interval, the values are
d period.
s.
Pea
Peak demand values are produced for
rrent and the real and
active power
quantities. These display the maximum
measured quantity since the last reset
of the demand values.
1.4.6
Settings
The following settings under the headin
t set-up can be used to configure the
relay measurement function.
Menu Text
Defau
Available settings
1.4.5
Demand values
The relay produces fixed, rolling and peak demand values, using the reset demand menu
cell. It is possible to reset these quantities via the user interface or the remote
communications.
Fixed demand values
The fixed demand value is the average value of a quantity over the specified interval; values
are produced for each phase current and for three phase real and reactive power. The fixed
demand values displayed by th
updated at the end of the fixed deman
Rolling demand values
The rolling demand values are similar to the fixed demand values, the difference being that a
sliding window is used. The rolling demand window consists of a number of smaller
sub-periods. The resolution of the sliding window is the sub-period length, with the displayed
values being updated at the end of each of the sub-period
k demand values
each phase cu
re
value of the
g measuremen
lt Settings
MEASUREMENT SETUP
Default Display
Description
Description/Plant Reference/
Frequency/Access Level/3Ph + N
Current/3Ph Voltage/Power/Date
and Time
This setting can be used to select the
rom a range of options, note that it is
also possible to view the other default
at the default level usi
the
and
keys. However once the 15 minute
display will revert to that
selected by this setting.
default display f
displays whilst
timeout elapses the default
ng
Local Values
Primary
Primary/Secondary
This setting controls whether measure
front panel user inter
e and the
d values via the
fac
front courier port are displayed as primary or secondary quantities.
Remote Values
Primary
Primary/Secondary
This setting controls whether measured values via the rear communication port are
displayed as primary or secondary quantities.
Measurement Ref.
VA
VA/VB/VC/
Ι
A/
Ι
B/
Ι
C
Using this setting the phase reference for all angular measurements by the relay can be
selected.
Measurement Mode
0
0 to 3 step 1
This setting is used to control the signing of the real and reactive power quantities; the
signing convention used is defined in section 1.4.3.
Fix Dem. Period
30 minutes
1 to 99 minutes step 1 minute
This setting defines the length of the fixed demand window.
Содержание MiCOM P846
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