Siemens 7SJ82, Manual

Page: 1485 / 1638

3I0 delta pulse off-on 5 % to 50% Increments of 1 %
Pulse-on duration
Pulse-off duration 0.20 s to 10.00 s Increments of 0.01 s
No. of pulses for operate
Monitoring time(in pulses) 2 to 100 Increments of 1
Max.tolera.pulse-on or off 0.02 s to 2.00 s Increments of 0.01 s
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
15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Voltage transformer 150 mV sec.
Times
Operate delay = 0 ms
Approx. 2.5 s + 0.3 s + OOT 104 at 50 Hz and 60 Hz 105
Dropout time Approx. 32 ms + OOT at 50 Hz and 60 Hz
104 OOT (Output Operating Time): additional delay of the output medium used, see chapter 12.1.4 Relay Outputs
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
Technical Data
12.18 Sensitive Ground-Fault Detection
SIPROTEC 5, Overcurrent Protection, Manual 1485
C53000-G5040-C017-8, Edition 07.2017