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Since the xiliary voltage needs isolated from the "galvanically separated converters" accordance ith
/ the IEC standard 60950 (UL 1950) the equivalent IEC 60364-41 and CEI 64-8 have used guarantee rre in
L ode akage rre (as fin IEC 478/1 and CEI 22/3) 3.
43/158
.3 Environm ental characteristics
Operating temperature
Storage temperature
Relative humidity
Degree protection (with PR122/P installed the CB)
13.2 Electrical characteristics
Rated operating frequency
Pass band
Peak factor
MTBF (MIL-HDBK-217E)
13.. particular:
1. Protection against overload with inverse time "L";
2.5 unication bus
Local bus rear connector; RS485 physical interface, Modbus protocol. 98% with condensation
IP 30
Zone selectivity: input for protection S
Zone selectivity: input for protection G
(only with Vaux)
(only with Vaux)
13. 2
Page No.1 Binary inputs
- K51/SZin:
- K51/Gzin:
13.n°.E3 E4.With the optional PR120/V module, the PR122/P also assures the following protections:
S bol Protection against
UV undervoltage
OV overvoltage
RV residual voltage
RP reverse active power
UF underfrequency
OF overfrequency
U phase-to-phase voltage unbalance (as alternative phase currents)
13.4..
13. +70°C
-40°C .2.2.3 Powered the PR120/V odule
For full explanation the features the PR120/V, see par.4 escription inputs/outputs
-25°C . Protection against short-circuit with adjustable delay "S";
Model 2234 Apparatus Scale
L 2778
Doc.
13..2.2 Binary outputs
- K51/SZout: Zone selectivity: output for protection (only with Vaux)
- K51/GZout: Zone selectivity: output for protection (only with Vaux)
Note: These inputs/outputs should used between PR122/PR123 and PR332/PR333 series units only.2.2. +90°C
0% .E6 E1.2.6 Protection functions
The PR122/P protection unit carries out independent protection functions.1.
The characteristics are given the table below:
General characteristics Relay Enabling Display Switch-On
E1.. 15..2.....2.
Using this supply mode, the unit's protection functions are assured, however, not the accessory functions regarding the modules.4.2.5m A..E6
Minimum three-phase busbar current for enabling relay and switching the display >70A >140A >160A >320A
50/60 ±10%
3000 max
6.
External system bus, RS485 physical interface, Modbus RTU protocol, baud rate 9600-19200 bps.1 lf-su ply
The self-supply enables the protection unit powered with the busbar current using current transformers..
13.
The presence the auxiliary power supply enables the relay unit used even with the circuit-breaker open, well powering all the modules.
The characteristics the power pack are given the table below:
C haracteristics Version PR122/P
Auxiliary voltage
(galvanically separated) 24V ±20%
Maximum ripple 5%
Inrush current 24V ~10 for 5ms
Rated power 24V ~5W
13.3 max 2In
15 years 45°C
1 ilia ly
The external auxiliary power supply provided using galvanically-separated power pack.
Test bus front test connector.2.E3 E4.2.
