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4.
13.
13.2.2.2. Protection against reverse active power "RP";
12.2..6.
The characteristics the power pack are given the table below:
Characteristics Version PR123/DC
Auxiliary voltage
(galvanically separated) 24V ±20%
Maximum ripple 5%
Inrush current 24V ~10A for 5ms
Rated power 24V ~5W
13. Protection against overvoltage "OV";
11.
A timing indication (message "alarm" LED) provided the unit's display, which activated during protection alarm.. the case where the presence
of current determined with the circuit-breaker the "OPEN" state, state error signaled warning message being displayed (see par.
Test bus front test connector. Override protection when release not powered.
13.2 Auxiliary power supply
The external auxiliary power supply provided using galvanically-separated power pack.1 Powered the PR120/V-PR120/LV module
For full explanation the features the PR120/V-PR120/LV, see par.2. 14.
A
Since the auxiliary voltage needs isolated from the ground, "galvanically separated converters" accordance with
the IEC standard 60950 (UL 1950) the equivalent IEC 60364-41 and CEI 64-8 have used guarantee current in
common mode leakage current (as defined IEC 478/1 and CEI 22/3) greater than 3.6) and the "warning" LED lighting up.6 Protection functions
The PR123/DC protection unit carries out independent protection functions.13. +70°C
Storage temperature -40°C .
The signal can combined with relay the PR120/K module with those the PR021/K unit..2. Protection against undervoltage “UV”;
10.
50/1 08
.2. When the circuit-breaker opens, the page with the "Trip" data displayed
(when Test" pressed, automatically the presence Vaux). Protection against short-circuit with adjustable delay “S” and "S2";
3.4.
The presence the auxiliary power supply enables the relay unit used even with the circuit-breaker open, well powering all the modules,
with the exception the PR120/V-PR120/LV MEASURING module, which powered means connection the busbars. disabled when
the alarm condition ceases when the protection has been tripped.
13. particular:
1..1.
13. Protection against overload with inverse time “L”;
2.4 Description inputs/outputs
13. 98% with condensation
Degree protection (with PR123/DC installed the CB) 30
13.2. +90°C
Relative humidity . Protection against instantaneous short-circuit high currents inst";
7.2. Protection against instantaneous short-circuit “I”;
4..1 Binary inputs
- K51/SZin (K51/DFin): Zone selectivity: input for protection (only with Vaux)
- K51/Gzin (K51/DBin): Zone selectivity: input for protection (only with Vaux)
13..2 Binary outputs
- K51/SZout (K51/DFout): Zone selectivity: output for protection (only with Vaux)
- K51/GZout (K51/DBout): Zone selectivity: output for protection (only with Vaux)
Note: These inputs/outputs can used between PR122/PR123 series units only.
External system bus, RS485 physical interface, Modbus RTU protocol, baud rate 9600-19200 bps.3 Environmental characteristics
Operating temperature -25°C . Protection against phase unbalance “U” ;
8.5mA. Protection against earth fault with adjustable delay “G”;
6.
Model 3447
A pparatus Emax DC
S cale
D 1SDH000635R0002
Page No.2.5 Communication bus
Local internal bus rear connector; RS485 physical interface, Modbus protocol.1 Circuit-breaker state
The PR123/DC unit records the state the circuit-breaker means specific wiring the circuit-breaker. Protection against overtemperature "OT";
9. Protection against closing short-circuit “MCR”
5
