L3447
Emax DC
45/108
Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000635R0002
L3728
12.5.7.1
Information on the trip and opening data
The PR122/DC unit saves all the information relating to the type of protection tripped, the opening data, the date and time. Using the "i Test" key
makes the release show all these data directly on the display. There is no need for an auxiliary power supply for this function. With an auxiliary
power supply, the information is shown immediately on the display without the need to press the "i Test" key and remains displayed indefinitely
until you press the key.
Information remains available for 48 hours with the relay de-energized. The data relating to the last 20 trips are stored in the unit's memory. By
connecting a PR030/B and PR010/T battery unit or a BT030 wireless communication unit, you can retrieve the information relating to the last 20
trips recorded.
Access to view the opening data is via the Historicals submenu in the Measurements menu. The following is an example of the information provided:
Again in the Measurements menu, you can view the percentage of contact wear, which is an indication of the electrical life of the electrical contacts
in the circuit-breaker.
In any case, functionality of the relay is in no way modified by the presence of the wear messages.
The prealarm message (wear > 80%, "warning" LED lighting up) indicates that the wear has reached a high value. The alarm message (100%
wear, "alarm" LED lighting up) indicates that it is necessary to check the state of contact wear.
The percentage of wear depends on the number of openings carried out by the circuit-breaker and by the absolute current interrupted during
each of them.
12.6.2 Electrical signals
K51/p1...p4
Programmable electrical signals if the PR120/K module is installed and there is an auxiliary power supply.
K51/p1...p8
Programmable electric signals if the PR021/K unit is installed and there is an auxiliary power supply.
Pressing the "i Test" key enables resetting the activated contacts.
12.6 Definition of alarms and signals in the PR122/DC unit
12.6.1 Optical signals
Signaling
Description
Warning
Led (fixed yellow
•The prealarm threshold has been exceeded; current values in the range 0.9xI
1
< I < 1.05xI
1;
light)
•Contact wear greater than 80% (and less than 100%);
•WARNING Threshold Iw exceeded;
•Circuit-breaker state error;
•Configuration error;
•Settings inconsistency.
Warning
Led (yellow 0.5Hz)
•Relay’s internal temperature exceeding WARNING threshold.
Warning
Led (yellow 2Hz)
•Relay’s internal temperature exceeding ALARM threshold.
• Presence of current values I >1.3 I1 (timing protection “L”)*;
Alarm
Led (red)
• Timing in progress for protection function S;
• Contact wear = 100%;
• Rating Plug disconnected;
• Trip Coil (TC) disconnected;
• Key plug error;
• CB/release inconsistency
• Installation error.
* The IEC 60947-2 Standard defines the timing threshold L for current: 1.05 < I < 1.3 I1.
1/3
Last Trip
June
2007
12,
I1:
625A
L Protection
N.02
8:52:11:733
Number of openings due to the protections.
Indication for protection tripped.
Value of the current
