Siemens Reyrolle 7SR54 - Time-Delayed Earth Fault - Calculated

51N Time-Delayed Earth Fault – Calculated
Reference
Parameter Value
I
set
Setting 0.05 to 2.5 ⋅ I
rated
, Δ 0.01
I Applied current (for
operate time)
IDMTL 0 to 2 ⋅ I
set
(switched)
0 to 20 ⋅ I
set
(switched)
DTL 0 to 5 ⋅ I
set
(switched)
char Characteristic IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
Tm Time multiplier (IEC/ANSI) 0.025 to 1.6, Δ 0.025
1.6 to 5, Δ 0.1
5 to 100, Δ 1
t
delay
Delay setting 0 to 20 s, Δ 0.01 s
Minimum operate time 0 to 20 s, Δ 0.01 s
Follower DTL 0 to 20 s, Δ 0.01 s
t
reset
Reset setting ANSI decaying
IEC decaying
DTL: 0 to 60 s
Operate and Reset Level
Attribute
Value
I
op
Operate level 105 % I
set
: ± 4% or ± 1 % I
rated
Reset level ≥ 95 % I
op
Repeatability ± 1 %
Variation IEC
60255-1
-10 °C to +55 °C ≤ 5 %
f
rated
± 5 % ≤ 5 %
10.18
Technical Data
10.18 51N Time-Delayed Earth Fault – Calculated
Reyrolle 7SR5, Transformer Protection Device, Device Manual 483
C53000-G7040-C015-1, Edition 11.2019