Specifications

L2234
L2778
L4681
L5179
Emax
42/161
Doc. no.
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
Protection
Disabling
Trip threshold Trip time
Trip
threshold
tolerance
(2)
Trip
time
tolerance
(2)
I
(t=k)

I3 = 1,5 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 -
10 - 11 - 12 - 13 - 14 - 15 x In
≤ 30 ms
± 10%
G
(t=k)

I4 = 0,2 - 0,3 - 0,4 - 0,6 - 0,8 - 0,9 -
1 x In
Where I
f
> I4
± 7%
The best of the two data:
± 10% o ± 40 ms
t4 = 0.1 - 0.2 - 0.4 - 0.8 s
G
(t=k/I
2
)

I4 = 0,2 - 0,3 - 0,4 - 0,6 - 0,8 - 0,9 -
1 x In
Minimum trip time
± 7% ± 15%
t4 = 0.1 - 0.2 - 0.4 - 0.8 s
I inst

Automatic, defined by SACE Instantaneous
(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 (no start-up) with 2 or 3 supplied phases
and/or in presence of auxiliary supply.
- trip time setting ≥100ms
For all cases not covered by the above hypotheses, the following tolerances apply:
Protection rip threshold Trip time
L Release between 1,05 e 1,25 x I1 ± 20%
S ± 10% ± 20%
I ± 15%  60ms
G ± 10% ± 20%
Others ± 20%
12.2.8. Table of measurements
Type of measurement Range of values measured by the relay
Standard operation range
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
12.2.9. Trip curves
The trip curves provided are merely for guidance and only show a sub-group of the possible selections (see par. 12.2.7).
12.2.9.1. Trip curves for functions L-I