ABB Relion 650 Series Applications Manual page 219

1MRK 505 287-UUS B
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.
13.2.3 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
tEnergy : Time interval when energy is measured.
StartAcc : Disabled / Enabled is used to switch the accumulation of energy on and off.
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 ERRAccPlsQty : 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.
Busbar protection REB650
Application manual
The input signal STACC is used to start accumulation. Input signal STACC cannot
be used to halt accumulation. The energy content is reset every time STACC is
activated. STACC can for example, be used when an external clock is used to switch
two active energy measuring function blocks on and off to have indication of two
tariffs.
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SEMOD175556-4 v4
100 ms.
Section 13
Metering
213