ABB Relion 670 Series RES670, Technical Manual

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Figure 230 shows the logic for integration of energy in active forward direction. Similarly,
the integration of energy in active reverse, reactive forward and reactive reverse is done.
T
F
T
F
T
F
S
X
60.0
q
-1
0.0
q
-1
&
RSTACC
EAFPrestVal
ACCINPRG
P* (ACTIVE FORWARD)
EAFACC
a>b
a
b
EALim
IEC13000187-4-en.vsd
q
-1
= unit delay
IEC13000187 V4 EN
Figure 230: Logic for integration of active forward energy
The energy pulses generated by using internally calculated accumulated energy values
and energy per pulse (
ExxAccPlsQty ) setting. The accumulated energy values are divided
by the energy-per-pulse value to get the number of pulses. The number of 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 . Figure
231 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.
1MRK 511 365-UUS A
Section 17
Metering
Phasor measurement unit RES670 2.1 ANSI 595
Technical manual