Table of Contents
Advertisement
3I0 delta pulse off-on
Pulse-on duration
Pulse-off duration
No. of pulses for operate
Monitoring time(in pulses)
Max.tolera.pulse-on or off
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent/overvoltage and of 105 % for
undercurrent/undervoltage functionality.
Minimum absolute dropout differential
Protection-class current transformer
Instrument current transformer
Voltage transformer
Times
Operate delay = 0 ms
Dropout time
104
OOT (Output Operating Time): additional delay of the output medium used, see chapter
105
After the first valid pulse is detected, the function picks up. For the typical settings 1.00 s of Pulse-on duration, 1.50 s of Pulse-off
duration, and 0.15 s of Max.tolera.pulse-on or off, the inherent pickup time is approx. 1 s + 1.5 s + 2 ⋅ 0.15 s + OOT
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
12.18 Sensitive Ground-Fault Detection
5 % to 50%
0.20 s to 10.00 s
2 to 100
0.02 s to 2.00 s
15 mA sec. (I
= 1 A) or
rated
75 mA sec. (I
= 5 A)
rated
0.5 mA sec. (I
= 1 A) or
rated
2.5 mA sec. (I
= 5 A)
rated
150 mV sec.
Approx. 2.5 s + 0.3 s + OOT
Approx. 32 ms + OOT at 50 Hz and 60 Hz
12.1.4 Relay Outputs
Technical Data
Increments of 1 %
Increments of 0.01 s
Increments of 1
Increments of 0.01 s
104
at 50 Hz and 60 Hz
105
1485
Advertisement
Table of Contents
