FM9925A-E ABB distributed control system industrial DCS module card

Description

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Example of events indicated by the “ALARM” LED:
– overload (may begin from 1.05xl1<I<1.3xl1, in accordance with the standard IEC 60947-2);
– timing of function L;
– timing of function S;
– timing of function G;
– second temperature threshold exceeded (85 °C);
– contact wear 100%;
– timing of Reverse Power flow protection (with optional PR120/V);
Data logger
By default PR122/P, as well as PR123/P, is provided with the Data Logger function, that automatically records in a wide memory buffer the instantaneous values of all the currents and voltages.
Data can be easily downloaded from the unit by means of Ekip Connect application using a
Bluetooth port and can be transferred to any personal computer for elaboration. The function
freezes the recording whenever a trip occurs, so that a detailed analysis of faults can be easily
performed. SD-Pocket and Ekip Connect allow also reading and downloading of all the others
trip information.
• Number of channels: 8
• Maximum sampling rate: 4800 Hz
• Maximum sampling time: 27 s (@ sampling rate 600 Hz)
• 64 events tracking
Trip information and opening data
In case a trip occurs PR122/P and PR123/P store all the needed information:
• Protection tripped
• Opening data (current)
• Time stamp (guaranteed with auxiliary supply or self-supply with power failure no longer than
48h)
By pushing the “info/Test” pushbutton the trip unit shows all these data directly on display.
No auxiliary power supply is needed. The information is available to user for 48 hours with the
circuit breaker open or without current flowing.
The information of the latest 20 trips are stored in memory.
If the information can be furthermore retrieved more than 48 hours later, it is sufficient to connect
a PR030/B battery unit or a BT030 wireless communication unit.
Load control
Load control makes it possible to engage/disengage individual loads on the load side before
the overload protection L is tripped, thereby avoiding unnecessary trips of the circuit-breaker
on the supply side. This is done by means of contactors or switch-disconnectors (externally
wired to the trip unit), controlled by the PR122/P by PR120/K internal contacts, or by the local
device LD030 DO.
Two different Load Control schemes can be implemented:
– disconnection of two separate loads, with different current thresholds
– connection and disconnection of a load, with hysteresis
Current thresholds and trip times are smaller than those available for selection with protection
L, so that load control can be used to prevent overload tripping.
Internal PR120/K or external the local device LD030 DO is required for Load Control. The
function is only active when an auxiliary power supply is present.