pulses can be reset to zero by activating
RSTACC
input or by using the local HMI reset
menu. The pulse on and off time duration is set by the settings
tEnergyOnPls
and
tEnergyOffPls
shows the logic for pulse output generation for the
integrated energy in the active forward direction. Similarly, the pulse generation for
integrated energy in the active reverse, reactive forward and reactive reverse is done.
S
a>b
a
b
Counter
Rst
CU
CV
X
q
-1
÷
÷
R I
R I
a>b
a
b
0
Counter
Rst
CU
CV
q
-1
EAFPULSE
RSTACC
EAFACC
T
F
t
tOff
TP
0
q
-1
tEnergyOffPls
EALim
EAFAccPlsQty
tEnergyOnPls
IEC13000188-4-en.vsd
q
-1
= unit delay
IEC13000188 V4 EN
Figure 459:
Logic for pulse generation of integrated active forward energy
The maximum demand values for active and reactive power are calculated for the set
time interval
tEnergy
. The maximum values are updated every minute and stored in a
register available over communication and from outputs
MAXPAFD
,
MAXPARD
,
MAXPRFD
and
MAXPRRD
for the active and reactive power forward and reverse
direction. When the
RSTDMD
input is active from the local HMI reset menu, these
outputs are reset to zero. The energy alarm is activated once the periodic energy value
crosses the energy limit
ExLim
. Figure
shows the logic of alarm for active forward
energy exceeds limit and Maximum forward active power demand value. Similarly,
the maximum power calculation and energy alarm outputs in the active reverse,
reactive forward and reactive reverse is implemented.
1MRK502052-UEN B
Section 17
Metering
991
Technical manual
Summary of Contents for Relion REG670
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