L2234
Emax
34/158
Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000460R0002
L2778
(1)
The minimum value of this trip is 1s regardless of the type of curve set
(self-protection).
(2)
These tolerances apply in the following conditions:
- self-powered relay at full power (without start-up)
- presence of auxiliary power supply
- two-phase or three-phase power supply
- trip time setting
≥100ms
For all cases not covered by the above hypotheses, the following tolerances apply:
Protections Trip threshold Trip time
L Release between 1.05 and 1.25 x I1 ± 20%
S ± 10% ± 20%
I ± 15% ≤ 60ms
G ± 10% ± 20%
Others ± 20%
Disabling
Trip threshold Trip time
Trip
threshold
tolerance
(2)
Protection
Trip
time
tolerance
(2)
L I1 = 0.4 - 0.425 - 0.45 - 0.475 - 0.5 - Release between
(t=k/I
2
) 0.525 - 0.55 - 0.575 - 0.6 - 0.625 - t1 = 3 - 12 - 24 - 36 - 48 - 72 1.05 and 1.2 x I1 ± 10% I
g
≤ 6 x In
0.65 - 0.675 - 0,7 - 0.725 - 0.75 - 108 - 144 s
(1)
± 20% I
g
> 6 x In
0.775 - 0.8 - 0.825 - 0.85 - 0.875 - @ 3 I1
0.9 - 0.925 - 0.975 - 1 x In
S I2 = 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 5 - Where I > I2 ± 7% I
g
≤ 6 x In The best of the two data:
(t=k) 6 - 7 - 8 - 8.5 - 9 - 9.5 - 10 x In t2 = 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6 ± 10% I
g
>6 x In ± 10% or ± 40 ms
0.7 - 0.8 s
S I2 = 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 5 - t2 = 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6 ± 7% I
g
≤ 6 x In ± 15% I
g
≤ 6 x In
(t=k/I
2
) 6 - 7 - 8 - 8.5 - 9 - 9.5 - 10 x In 0.7 - 0.8 s ± 10% I
g
>6 x In ± 20% I
g
>6 x In
@ 10 In
I I3 = 1.5 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - ≤ 30 ms ± 10%
(t=k) 11 - 12 - 13 - 14 - 15 x In
G I4 = 0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 0.9 - Where I > I4 ± 7% The best of the two data:
(t=k) 1 x In t4 = 0.1 - 0.2 - 0.4 - 0.8 s ± 10% or ± 40 ms
t4 = 0.1@ 4.47 I4
G I4 = 0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 0.9 - t4 = 0.2@ 3.16 I4 ± 7% ± 15%
(t=k/I
2
) 1 x In t4 = 0.4@ 2.24 I4
t4 = 0.8@ 1.58 I4
I inst Automatic, defined by SACE Instantaneous
12.2.7 Summary table of protections
12.2.8 Table of measurements
Type of measurement Standard operation range
Range of values measured by the relay Range Tolerance %
Phase and neutral current 0,05 ... 16 In 0,3 ... 6 In ± 1,5
Earth fault current 0,05 ... 4 In 0,3 ... 4 In ± 1,5