Ormazabal ekor.rpa Series, General Instructions Manual, Page: 45 / 116

IG-267-EN versión 01; 07/04/2017
45
General Instructions
ekor
.rpa
Detection, automation and control functions
5.2. Voltage presence/absence automation
5.2.1. Functionality
This automation allows detection of presence or absence of
voltage in those lines where the
ekor
.rpa unit is installed.
The voltage presence/absence automation individually
checks for the presence or absence of voltage in each of the
line phases. There are three input signals, one per phase.
Moreover, it determines the presence of voltage in each of
the phases, when the measured voltage exceeds a “
voltage
level for presence
” percentage of the voltage defined as “
line
voltage
”, for a time above the value set as “
voltage presence
time
”. Likewise, it determines the absence of voltage when
the voltage drops below a percentage
"voltage level for
absence"
of the line voltage for a period of time longer
than the value adjusted as
"voltage absence time
”. The
"line
voltage"
parameter is the habitual rated phase-to-phase
operating voltage of the medium-voltage line.
1
Presence of voltage
2
Absence of voltage
Figure 5.2. Presence/absence of voltage
5.2.2. Settings
The setting parameters for the voltage presence/absence
automation are:
•
Enabling the unit
: Corresponds to voltage presence/
absence automation activation (ON/OFF).
•
Line voltage
: Line voltage setting (from 0.5 kV to
72.0 kV).
•
Presence of voltage level
: Line voltage percentage
above which the automation will consider presence of
voltage (from 10% to 120% of line voltage).
•
Absence of voltage level
: Line voltage percentage
below which the automation will consider absence of
voltage (from 10% to 120% of line voltage).
•
Voltage presence/absence hysteresis
: Voltage presence/
absence hysteresis (from 10% to 120% of line voltage).
•
Presence of voltage time
: Timing to indicate presence
of voltage (from 0.05 s to 200.00 s).
•
Absence of voltage time
: Timing to indicate absence of
voltage (from 0.05 s to 200.00 s).
5.2.3. Voltage presence/absence automation statuses
The voltage presence/absence automation implemented in
the
ekor
.rpa-100 system generates a series of signals which
report its status. These signallings are:
•
Presence of voltage for each phase
: Independent
indication of the presence of voltage for each phase.
•
Absence of voltage for each phase
: Independent
indication of the absence of voltage for each phase.
•
Presence of line voltage
: Indication of presence of line
voltage. Can be configured by user PLC. By default, this
indication will be an OR of the phase presences.
•
Absence of line voltage
: Indication of absence of line
voltage. Can be configured by user PLC. By default, this
indication will be an AND of the phase absences.