ABB Relion 670 Series Applications Manual page 453

1MRK 511 358-UUS A
which is selected to the active and reactive component as preferred. Also all Accumulated Active
Forward, Active Reverse, Reactive Forward and Reactive Reverse energy values can be presented.
Maximum demand values are presented in MWh or MVArh in the same way.
Alternatively, the energy values can be presented with use of the pulse counters function
(PCGGIO). The output energy values are scaled with the pulse output setting values
EARAccPlsQty , ERFAccPlsQty and ERVAccPlsQty of the energy metering function and then the
pulse counter can be set-up to present the correct values by scaling in this function. Pulse counter
values can then be presented on the local HMI in the same way and/or sent to the SA (Substation
Automation) system through communication where the total energy then is calculated by
summation of the energy pulses. This principle is good for very high values of energy as the
saturation of numbers else will limit energy integration to about one year with 50 kV and 3000 A.
After that the accumulation will start on zero again.
17.2.3 Setting guidelines
The parameters are set via the local HMI or PCM600.
The following settings can be done for the energy calculation and demand handling function
ETPMMTR:
GlobalBaseSel : Selects the global base value group used by the function to define ( IBase ), ( VBase )
SBase ).
and (
Operation : Disabled / Enabled
EnaAcc : Disabled / Enabled is used to switch the accumulation of energy on and off.
tEnergy : Time interval when energy is measured.
tEnergyOnPls : gives the pulse length ON time of the pulse. It should be at least 100 ms when
connected to the Pulse counter function block. Typical value can be
tEnergyOffPls : gives the OFF time between pulses. Typical value can be 100 ms.
EAFAccPlsQty and EARAccPlsQty : gives the MWh value in each pulse. It should be selected together
with the setting of the Pulse counter (PCGGIO) settings to give the correct total pulse value.
ERFAccPlsQty and ERVAccPlsQty : gives the MVArh value in each pulse. It should be selected
together with the setting of the Pulse counter (PCGGIO) settings to give the correct total pulse
value.
For the advanced user there are a number of settings for direction, zero clamping, max limit, and
so on. Normally, the default values are suitable for these parameters.
Application manual
EAFAccPlsQty ,
SEMOD175556-4 v6
100 ms.
Section 17
Metering
447