Poznámky redaktora
In some installations, where particularly high harmonics occur, the current circulating the neutral may higher than that the phases.4.
1 tra ific tio s
Neutral (InN) adjustment must meet the following formula: I1x InN<Iu. For three-pole CBs only.
1 PR120/V EASURING le
Modules 1/4
1 MEASURING module
COM module
SIGNALLING module ▼
Module configuration
MEASURING module 1/5
Voltage Transf
Rated voltage
Positive Power flow
Absent
In the measuring module you must enter password and can then opt for the absence presence the voltage transformer. 13. 230V).: With E1B800 with 400A Rating Plug, 800A and 11n, InN adjustment may be: 50-100-200%.6.g.
The power flow can LOW HIGH HIGH LOW. After entering password you can choose whether the neutral connection Absent
or Present..
Settings 2/8
Enter J
Password
Enter J
Mains Frequency 1/2)
Circuit Breaker
0***
Enter password
1 Hz
| Main Frequency Hz
Modules ▼
50 Hz
-----------------------------F" ---------------------►
13.4.
In the SACE PR122/P release, this protection can set for the following values: InN= 50% 100% 150% 200% In.5. 13. 1000V) and secondary voltage (100, 110, .
For four-pole CBs only..
13.4.2 Neutral adjustm ent
The neutral protection normally set current value 50% the adjustment made the phases.
In case four-pole CB, this setting checked the relay which signals any failure through Led (see par..
E.1), and adjusts the parameter
independently the accepted limits.
In any case, the relay records any setting error between I1and the Neutral setting and signals this means the warning (see par.1)..3 ains frequency settings
In the mains frequency menu, you can choose between the frequency values: 50, 60Hz. Actual maximum allowable adjustm ent must take into account any
tem perature derating, term inals used and altitude, (rating plug)< 50% circuit breaker size.3).
69/158
. Moreover, you
can select the values the primary voltage (100, 115, 120, .5.6.
With E1B800 with 800A Rating Plug, 800A and 11n, InN adjustment may be: 50-100%.
A
Failure ith ttin lim its "I1" and "InN" can cause circ it-b dam age ith t
ris even r.
Model 2234 Apparatus Scale
L 2778
Doc No- 2
Page No.3) and the PR021/K unit (see par.
Note I1=1lnsetting intended the maximum adjustm ent the protection against overloads.Parameter Function Values
System Date
Time
Language English/Italiano/Français/Deutsch/Espanol
New password
D isplay Contrast
The summary table relates the surfing the pages dedicated the PR120/K module (see par.
13. 16.5.
In case three-pole with external neutral, the relay performs checks and user must correct the settings.4 s
W hen acce ttings enu, set ila relatin odules. 15
