L2234
Emax
106/158
Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000460R0002
L2778
Parameter / Function Values Notes
Data Logger Enable ON/OFF See Annex par. 16.4
Sampling frequency
Stop event
Stopping delay
Restart
Stop
Dual setting Enable ON/OFF
Default setting SET A / SET B
Dual Set CB closure
Dual Set with Vaux
Measurement interval from 5 to 120 min, step 5 min
Harmonic distortion ON/OFF The warning indicates that the distortion exceeds
factor 2.1
System Date
Time
Language English/Italiano/Français/Deutsch/Español
New password
Display Contrast
The summary table relates to the surfing of the pages dedicated to the PR120/K module (see par. 15.3) and to the PR021/K unit (see par. 16.1).
In any case, the relay records any setting error between I
1
and the Neutral setting and it signals this by means of the warning (see par. 14.6.3).
For four-pole CBs only.
14.5.4.3 Mains frequency settings
In the Mains frequency menu, you can choose between the frequency values: 50, 60Hz.
2/9
50 Hz
Main Frequency
Modules
Circuit Breaker
Settings
Password
Enter password
0***
1/2
4P
60 Hz
50 Hz
Main Frequency
Enter ↵
Enter ↵
14.5.4.2 Neutral adjustment
The neutral protection is normally set to a current value 50% of the adjustment made on the phases.
In some installations, where particularly high harmonics occur, the current circulating on the neutral may be higher than that of the phases.
In the SACE PR123/P release, this protection can be set for the following values: I
n
N = 50% - 100% - 150% - 200% * I
n
.
14.5.4.2.1 Neutral adjustment specifications
To adjust neutral (InN) comply with the following formula: I
1
x I
n
N
≤Iu.
With a 4-pole CB, this setting is checked by the relay which signals any failure by means of a LED (see par. 14.6.1) and adjusts this parameter
independently to the accepted limits.
With a 3-pole CB, with external neutral, the relay performs no checks and setting is to be done by user.
E.g.. With E1B800 CB having a 400A Rating Plug, Iu = 800A and I1 = 1In, I
n
N adjustment may be: 50-100-200%.
With E1B800 CB having a 800A Rating Plug, Iu = 800A and I1 = 1In, I
n
N adjustment may be: 50-100%.
Note 1: The adjustment I
1
=1I
n
is meant as the maximum adjustment of the overload protection. The actual maximum allowable adjustment must take into account any
temperature derating, the terminals used and the altitude, or In (rating plug)
≤ 50% of CB size.
Failure to comply with the setting limits for “I
n
” and “I
n
N” can cause circuit-breaker damage with consequent
risks even for the operator.
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