Specifications

L2234
L2778
L4681
L5179
Emax
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Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
14.5.4. Settings Menu
1/5
Protections settings
Measurements
Protections
Menu
Settings
1/8
Circuit breaker settings
Main Frequency
Modules
Circuit Breaker
Settings
2/3
Neutral settings
Neutral Protection
Unit installation
Ground protection
Circuit Breaker
On
Neutral threshold
Enable
Neutral protection
21/2
Enter 
Enter 
Enter  + PWD
The configuration parameters in the Settings menu are password protected. Among the most
significant values you can select, note the neutral threshold (values 50%, 100%, 150%, 200%),
the external toroid size (values 100A, 250A, 400A, 800A), the mains frequency at the installation
(values 50Hz, 60Hz). For a more detailed description of the settings for the modules, refer to
the documentation on the modules (ch. 15).
14.5.4.1. Settings Menu table
Parameter / Function Values Notes
Circuit breaker (*) Neutral protection
Enable ON/OFF
Neutral threshold 50%-100%-150%-200%
Ground protection Said protection is provided only in the
event of an external toroid being used
External toroidal transformer
Toroid size SGR Absent, SGR, Rc
Mains frequency 50 Hz - 60 Hz
Modules Module
PR120/V - Measuring if any see par. 14.5.4.4.1
PR120/D-M - COM if any see par. 14.5.4.4.2
PR120/K - Signalling if any see par. 14.5.4.4.3
Unità Bus Locale Absent - Present
Data logger Enable ON/OFF See Annex par. 16.3
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 distor-
tion exceeds factor 2.1
Sistem Date
Time
Language English/Italiano/Francais/
Deutsch/Español
New password
Display Contrast
* With the three-pole circuit breaker, the “3P+N” option is displayed and must be enabled if the outside neutral is installed.
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).
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
.