64
EN
DIRIS B-10L - 551174A - SOCOMEC
10. ALARMS
10.1. System alarms
If an installation error is detected during commissioning, a system alarm will be automatically activated.
10.1.1. Phase rotation (three-phase network)
A "Phase rotation" system alarm is activated upon identification of an incorrect phase rotation direction (for example 3-2-1
instead of 1-2-3).
10.1.2. V/I association
A "V/I association" alarm is activated when there is a wrong association between the current inputs and the voltage inputs of
the DIRIS B-10L.
•
If TE/TR/TF current sensors are used, this feature requires a power factor 0.6 < PF < 1 and a minimum load level I > 2% In
• If iTR current sensors are used, this feature also works off-load (AUTOCORRECT technology)
10.1.3. CT disconnected
A "CT disconnected" system alarm is activated if a current sensor (TE/TR/iTR/TF) is disconnected.
A digital output can be associated to each system alarm to report the alarm on an output.
A time delay at the start and end of the alarm can be set for each system alarm.
10.2. Measurement alarms
Up to 8 "Measurement alarms" can be configured when a threshold is exceeded for the electrical measurements,
consumption, variations in level.
The "Measurement alarms" are based on electrical parameters measured in the devices (both instantaneous and average
measurements):
- Currents, voltages, frequency
- Powers, power factors, Cos phi
- THD U, THD V, THD I
- Partial energies Ea+, Ea-, Er+, Er-, Eap
- Unbalance for voltage and current
You can choose to activate the alarm on a single-phase parameter (V1, I1, etc.) or only if a multi-phase Boolean condition is
fulfilled:
- On all the phases simultaneously: Phase1 AND Phase2 AND Phase3
- On one phase of the three phases: Phase1 OR Phase2 OR Phase3
A low and high threshold, as well as a hysteresis can be configured for each alarm.
A time delay at the start and end of the alarm can be set for each alarm.
A digital output can be associated to each alarm to report the alarm on an output.
The alarm can be acknowledged automatically or using a digital input.
