IG-267-EN versión 01; 07/04/2017
21
General Instructions
ekor.rpa
Protection functions
4.1.2. Instantaneous overcurrent units
The phase, neutral and sensitive neutral instantaneous
units start up if the fundamental value of the magnitude for
each unit exceeds the value 1.00 times the adjusted start-
up, and are reset when this value is below 0.95 times the
adjusted value.
Tripping takes place if the unit is started up for the time set.
The settings for the instantaneous units are:
• Enabling the unit: Enable/disable the unit (ON/OFF).
• Starting up the unit: Unit starting current. Variable
ranges in accordance with current transformers used.
• Fixed time: Unit tripping time (from 0.00 s to 100.00 s).
• Torque control: Directional tripping mask (OFF,
FORWARD or REVERSE). To indicate the direction for
tripping:
- OFF: Regardless of the direction, the relevant
overcurrent unit will trip if the overcurrent conditions
are met.
- FORWARD: The corresponding overcurrent unit
will trip whenever the overcurrent conditions are
met, and the directional unit will give the FORWARD
signal.
- REVERSE: The corresponding overcurrent unit will
trip whenever the overcurrent conditions are met,
and the directional unit will give the REVERSE signal.
This setting will only be found in ekor.rpa-100 units
model 120.
4.1.3. Block diagram
Any overvoltage unit complying with the diagram shown
below:
1
Metering
2
Input signal
3
Output signal
4
Settings
Figure 4.1. Block diagram
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