Specifications
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Emax
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Doc. no.
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
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, InN adjustment may be: 50-100-200%.
With E1B800 CB having a 800A Rating Plug, Iu = 800A and I1 = 1In, InN 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.
WARNING: 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.
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.
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50 Hz
Main Frequency
Modules
Circuit Breaker
Settings
Password
Enter password
0***
1/2
4P
60 Hz
50 Hz
Mains Frequency
Enter
Enter
14.5.4.4. Modules
When you access the Settings menu, there is a set of menus available relating to the modules.
14.5.4.4.1 PR120/V - MEASURING module
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Optinal modules
COM module
SIGNALLING module
MEASURING module
Modules
Module configuration
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Absent
Rated voltage
Positive Power flow
Voltage Transf
MEASURING module
In the measuring module you must enter a password and can then opt for the absence or presence of the voltage transformer.
Moreover, you can select the values of the primary voltage (100, 115, 120, ... 1150V) and secondary voltage (100, 110,..,230V).
The power flow can be Bottom Top or Top Bottom. After entering a password you can choose whether the neutral connec-
tion is to be Absent or Present. For three-pole CBs only.
14.5.4.4.2 PR120/D-M - COM module
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Communication parameters
COM module
SIGNALLING module
MEASURING module
Modules
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Local
Serial Address
Baudrate
Local / Remote
COM module
The local or remote modes can be selected after entering a password. The serial address can be displayed after entering a
password. The Baud Rate can be set on the values 9600 and 19200 bit/s. The physical protocol provides for the options: (8,E,1),
(8,0,1), (8,N,2), (8,N,1). The addressing can be selected as standard Modbus or ABB. For further information on the PR120/D-M
communication MODULE, see paragraph 15.2 in this manual.
14.5.4.4.3 PR120/K - SIGNALLING module
For a thorough examination of the signalling module, refer to the corresponding section of the module, paragraph 15.3.
14.5.4.4.4 PR120/D - BT module
This module is for wireless communication based on the Bluetooth standard between the PR123/P protection release and a laptop
with a Bluetooth port. For further information, see the description of the module in paragraph 15.4.
14.5.4.4.5 Settings for the Local Bus unit
If the PR021/K unit is connected, you need to enable the local bus by selecting present.