IG-267-EN versión 01; 07/04/2017
8
General description General Instructions
ekor.rpa
1.2.1. Electronic relay
The electronic relay has a keyboard and display to set and
view the protection and control parameters. Moreover, the
display provides information of the system's meterings,
alarms and control signals in real time. The keyboard
includes a seal on the <<SET>> key to ensure that once the
settings have been made they cannot be changed unless
the seal is broken.
The protection trips are registered on the display with the
following parameters:
• Trip unit
• The phasor at the moment of tripping (currents and
voltages).
• Tripping time. The time passing from start-up to tripping
of the unit.
• The time and date the event occurred.
Unit errors are also permanently displayed. Furthermore, it
is possible to check the fault reports using the front USB port
by connecting a PC to this port and using the implemented
folder system.
The “ON” LED is activated when the equipment receives
power from an external source and flashes quickly when
the relay starts up. This LED will flash less frequently
once the microprocessor has checked that the status of
the equipment is correct and all the protection units are
active. In this situation, the unit is operational to carry out
protection functions.
The voltage and current analogue signals are conditioned
internally by small and very accurate transformers that
isolate the electronic circuits from the rest of the installation.
The system has, in all its variants, 9 inputs and 4 outputs.
Both the inputs and the outputs are protected from
unwanted enabling/disabling.
The unit has 2 rear Ethernet ports for configuration, a
front mini-USB port for maintenance, and two rear RS-485
communications ports for remote control. The standard
communication protocols for all models are MODBUS and
PROCOME.
1
"ON" signalling LED
2
Metering and parameter setting display
3
SET key
4
Keyboard for scrolling through screens
5
Front mini-USB communication port
Figure 1.4. Description of the elements available on the front of the
ekor.rpa-120 relay
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