Specifications

L2234
L2778
L4681
L5179
Emax
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Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
N° Situation Possible causes Suggestions
18 Invalid date 1. First installation
2. Information lost due to power failure
FN see 14.4.3.1
19 Untimely trip see 14.6.3
20 LED lighting see 14.6.1
21 The language cannot be
changed
1. Relay remotely set
2. CB not open
3. Vaux or PR120/V or PR030/B not installed
1. Set locally
2. Open CB
3. Power the relay
14.7.1. In the case of a fault
WARNING: If you suspect that the PR123/P is faulty, if has a malfunction or has generated an unwanted trip, it
is advisable to follow the recommendations below very carefully from the
Measurements menu Historicals Trip:
1. Make a note of the type of protection that has tripped by accessing the LAST TRIP page if there is an external power supply
(Vaux or battery) or by pressing “i Test” if in self-powering mode.
2. Note down the type of circuit-breaker, number of poles, any accessories connected, In, Serial Number (see par. 14.4) and the
SW version.
3. Prepare a brief description of the opening (what LEDs and/or indications were displayed? when did it happen?, how many
times ?, was it always under the same conditions? what type of load? what voltage? what current? is the event reproducible?)
4. Send/communicate all the information collected, together with the circuit diagram for the circuit-breaker, to your nearest ABB
Customer Support service.
The completeness and accuracy of the information given to the ABB Assistance service will facilitate technical analysis of the
problem encountered, and will allow us to carry out all actions useful for the user rapidly.
WARNING: Letting a switch run with a fault that has not been remedied may lead to an apparatus malfunction
or shutdown. Remove the apparatus immediately until it can be inspected or repaired if this situation may lead
to personal injury, damage or is otherwise critical.
14.8. Accessories
14.8.1. ABB SACE PR010/T test and configuration unit
The test with the SACE PR010/T unit enables to check the proper operation of thresholds and tripping times of the protection func-
tions “L”, “S”, “I”, “G”, OV, UV, RV, U. The test unit is connected to the relay by means of the dedicated connector (see par. 13.4).
14.8.2. BT030 USB communication unit
Through the BT030 USB wireless communication unit, the PR122/P can be connected via wireless to a PC, extending the infor-
mation range available to the user.
14.8.3. PR021/K and HMI030 units
The PR123/P can also be connected to the PR021/K optional external indication unit (see par. 16), to signal through potential-
free power contacts, the protection and trip alarms, and to the HMI030 switchboard front unit to display a number of information.
14.8.4. PR030/B power supply unit
This unit is an external unit allowing powering of Relay, Autotest and Trip Test, checking with CB open and installation of new
replacement units.
14.8.5. Flex interface
Flex interfaces are electronic modules with analogue and/or digital inputs and outputs that can be fitted on a DIN guide. They can
be connected to the supervision system or to the electronic release by internal bus or external bus (see par.16.6).