Ormazabal ekor.rps - Reactive Power Reverse Protection; Minimum Apparent Power Protection

IG-150-EN version 04; 03/10/16
103
General instructions
ekor.rps
Protection functions. Description and settings
4.23.5. Reactive power reverse protection
General description
The protection acts when the reactive power ux is reversed
(eld loss in generators) and this exceeds the set value.
In this situation, the protection will trip the relay or relays
programmed for it.
There is also the possibility of programming two settings
with dierent time ranges.
Setting range
Setting Min Max Step Notes
Enable HI-Set YES/NO
React. Power reverse trip HI-Set [%] 1.0 200.0 0.1 Step 1 in versions before Q
Additional time HI-Set [s] 0.00 60.00 0.01
Enable LO-Set YES/NO
React. Power reverse trip LO-Set [%] 1.0 200.0 0.1 Step 1 in versions before Q
Additional time LO-Set [s] 0.00 600.0 0.01
Table 4.34. Setting range
4.23.6. Minimum apparent power protection
General description
It is a protection against excessive decreases in the generated
power. From the voltage and current measurements, the
protection calculates the active and reactive power and
the power factor and compares the apparent power with
the minimum power given by the setting. If the generated
power is lower than the set value, the protection trips the
corresponding relay.
Setting range
Setting Min Max Step Notes
Enable
YES/NO
Minimum power trip [%]
1.0 200.0 0.1 Step 1 in versions before Q
Additional time [s]
0.00 60.00 0.01
Table 4.35. Setting range
The tripping power is set in % of the rated power, which is
dened by the set value for the rated voltage and by the
protection’s rated current (unit’s rate).