IG-150-EN version 04; 03/10/16
86
Protection functions. Description and settings
General instructions
ekor.rps
4.16.2. Instantaneous characteristic
It is a definite time protection unit. It only checks if the
phase order is the programmed one or the opposite one. In
the case that the order is opposite to the programmed one
it will trip after a programmed time.
Settings ranges (6 tables)
Setting
Min
Max
Step
Notes
Enable
YES/NO
Definite time [s]
0.00
60.00
0.01
Table 4.21.
Setting range
The settings of both characteristics can be found in the
console on the screen “voltage protection”.
4.17. Zero sequence overvoltage protection
Zero sequence overvoltage protection (function 64 or 59N).
The pickup value set is the zero sequence voltage coming
from the open delta connection of the secondaries of the
three voltage transformers or the calculated zero sequence
voltage (3 V
0
) as vectorial sum of the phase simple voltages.
The setting defining whether the voltage is measured or
calculated is only accessible through keyboard/display, in
“Program table 0” – “define protect.” (key
#$8 8
) – “neutral
parameter”. At this point and under the text “NEUTRAL V
TRANSF.”, 3 possibilities can be chosen: “No transf” (in this
case the calculated value will be used), “voltage transf. 9” or
“voltage transf. 5” (depending on the concrete HW model
of the unit)
The function has the following characteristics to choose
from.
Timed characteristic (IEC or ANSI programmable curves)
1. Inverse normal time (I BSC or I ANSI)
2. Inverse short time (IC BSC)
3. Inverse long time (IL BSC)
4. Very inverse time (MI BSC or MI ANSI)
5. Extremely inverse time (EI BSC or EI ANSI)
6. Very inverse special time (MIEs BSC)
7. Moderately inverse time (ANSI)
8. 4 User curves (USER 1 up to USER 4)
9. Definite time
Instantaneous characteristic
1. Instantaneous unit
2. Additional time
The functioning of this protection does not cause an
automatic reclosing
The function can be deactivated by setting (timed and
instantaneous at the same time)
Summary of Contents for ekor.rps
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