Time-Delayed Derived Earth Fault Protection (51N) - Siemens Reyrolle 7SR45 Argus Device Manual

4.5

Time-Delayed Derived Earth Fault Protection (51N)

Operation
Elements
Setting range I
s
Time multiplier
Time delay (DTL)
Operate level
Reset level
Operate time
(with auxiliary power/load current)
IEC
IEEE/ANSI
DTL
Follower delay
Reset
Inhibited by
16 Add current tolerance of ± 5 % or ±2 % ⋅ I
0.1.
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020
(51N)
(whichever is greater) to the operating time tolerance for TMS below 0.1 and I
rated

4.5 Time-Delayed Derived Earth Fault Protection (51N)

Non-directional
Derived earth
0.10 ⋅ I to 0.80 ⋅ I
rated rated
Δ 0.01 ⋅ I
rated
0.01 to 10.00
Δ 0.01
0.00 to 15.00 s
Δ 0.01 s
110 % I , ± 5 % or ± 2 % ⋅ I
s rated
≥ 90 % I
op
16
± 5 % or ± 50 ms
td, ± 5 % or ± 40 ms
0.00 s to 20.00 s
Δ 0.01 s
IEC/ANSI decaying, 0 s to 60 s
Binary input or inrush detector
Technical Data
below
s
83