Siemens Reyrolle 7SR46 - Time-Delayed Earth Fault - Derived

51N Time-Delayed Earth Fault – Derived
Table 4-10 Reference
Operation Non-directional
Elements Derived earth fault
Setting range I
set
0.2 ⋅ I
s
to 2.5 ⋅ I
s
Time multiplier 0.01 to 10
Time delay (DTL) 0.00 s to 15 s
Operate level 110% I
set
, ±5 % or ±2 % ⋅ I
s
Reset level ≥ 90 % I
op
or I
set
‑ 4 % ⋅ I
s
Variation (-10 °C to +60 °C) ≤ 5%
Table 4-11 Operating Time and Resetting Time
Operate time (with auxiliary power/load current) IEC:
ANSI:
±5 % or ±50 ms
5
Follower delay 0.00 s to 20 s
Variation (-10 °C to +60 °C) ≤ 5%
Reset IEC/ANSI decaying, 0 s to 60 s
Inhibited by Binary input or inrush current detector
4.5
5
Add current tolerance of ±5 % of CT current measurement or ±2 % ⋅ I
s
(whichever is greater) to the operating time tolerance.
Technical Data
4.5 51N Time-Delayed Earth Fault – Derived
66 Reyrolle, 7SR46 Device, Manual
C53000-G7040-C103-1, Edition 10.2022