Multi-Tech Systems 7500 - Manual (Page 312)

Short and Long Interruptions ION 7500 / ION 7600 User’s Guide
Page 312 Power Quality: ION Meters and EN50160 Technical Note
Short and Long Interruptions
Interruption detection is based on half-cycle RMS measurements. The duration of
the interruption corresponds to the period during which the RMS value remains
less than 1% of the nominal voltage.
The observation period is 1 week. No evaluation criteria are suggested by either
the EN 501060 standard or the UNIPEDE Measurement Guide for Voltage
Characteristics; you should apply your own criteria to the data captured by the
meter.
The table below defines the classification scheme for counters Ni:
EN 50160 data (current observation period): The meter maintains the counters
listed in the table above for each phase. These counters are reset on a weekly basis.
EN 50160 data (previous observation period): The meter stores the counter values
listed in the table above for each phase on a weekly basis before these counters are
reset. These registers are also stored in a data recorder on a weekly basis.
Events: The meter creates a message in the Event log every time one of the counters
increases.
Parameter data: The meter can be enabled to record the duration of the
interruption and the timestamp for when the interruption occurred.
Interruptions Default Measurements
Counters from the present observation period are located in BIN modules. They
also recorded weekly by Data Recorder modules 24, 25
. C ounters are from the
previous observation (PO) Period are located in Store modules.
Optionally, the data below can be recorded at every Interruption event by Data
Recorder 35:
Duration of Interruptions duration < 1s 1s <= duration < 3 min duration >= 3 min
Number of Interruptions N
1
N
2
N
3
Register Label (Current Observation Period) Register Label (Previous Observation Period)
V1-Intrpt N1 V1-Intrpt N2 V1-Intrpt N3 PO V1-Intrpt N1 PO V1-Intrpt N2 PO V1-Intrpt N3
V2-Intrpt N1 V2-Intrpt N2 V2-Intrpt N3 PO V2-Intrpt N1 PO V2-Intrpt N2 PO V2-Intrpt N3
V3-Intrpt N1 V3-Intrpt N2 V3-Intrpt N3 PO V3-Intrpt N1 PO V3-Intrpt N2 PO V3-Intrpt N3
Register Label Description
V1-Irpt durtn interruption duration on phase 1
V2-Irpt durtn interruption duration on phase 2
V3-Irpt durtn interruption duration on phase 3