IG-267-EN versión 01; 07/04/2017
19
General Instructions
ekor.rpa
Metering functions
3.2. Power meterings
The powers which are monitored (locally or remotely) are
1.28 second integrated meterings of the calculated RMS
instantaneous values.
Accredited meterings in precision class guarantee reliability
in the values obtained.
The equipment acts as a metering station for load analysis
or electrical supply quality monitoring tasks. The monitored
meterings for active and reactive power are single-phase
and three-phase, and three-phase only for apparent power.
The meterings are made up of:
• Single-phase: Active PA, PB and PC and Reactive QA, QB
and QC.
• Three-phase: PT, QT and ST Powers and Power Factor
(P.F.).
3.3. Energy meter
The equipment is fitted with an "Active and reactive electrical
energy meter" which meets the particular requirements for
static energy meters. This is an indirect connection three-
phase meter which, along with the voltage and current
metering sensors, form a medium-voltage (MV) meter.
The energy meter accumulates 100 meterings of powers
P and Q integrated in a semicircle (1 second for 50Hz and
1.2 seconds for 60Hz). In total, there will be four meters:
three single-phase (A phase, B phase and C phase) and one
three-phase.
Each meter has two active energy records (E+ and E-) and
four reactive energy records (Q1, Q2, Q3 and Q4), each of
them 32 bits. These registers have a bit to indicate overflow
and a reset option by command.
Active powers are expressed in kilovolts-hour (kWh) and
reactive powers are expressed in kilovolt amperes reactive-
hour (kVArh).
a
Reactive
b
Inductive
c
Capacitive
d
Generated
e
Consumed
f
Active
Active energy imported (in kWh): EA + , EB + , EC + and ET +
Active energy exported (kWh): EA - , EB - , EC - and ET -
Inductive reactive energy imported (kVArh): QA1, QB1, QC1 and QT1
Capacitive reactive energy imported (kVArh): QA2, QB2, QC2 and QT2
Inductive reactive energy exported (kVArh): QA3, QB3, QC3 and QT3
Capacitive reactive energy exported (kVArh): QA4, QB4, QC4 and QT4
Figure 3.2. Energies
To Next Page
Loading...
Need help?
General
