Short and Long Interruptions

Short and Long Interruptions	ION 7500 / ION 7600 User’s Guide

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:

Duration of Interruptions	duration < 1s	1s <= duration < 3 min	duration >= 3 min

Number of Interruptions	N1	N2	N3

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. Counters are from the previous observation (PO) Period are located in Store modules.

Register Label (Current Observation Period)

V1-Intrpt N1	V1-Intrpt N2	V1-Intrpt N3

V2-Intrpt N1	V2-Intrpt N2	V2-Intrpt N3

V3-Intrpt N1	V3-Intrpt N2	V3-Intrpt N3

Register Label (Previous Observation Period)

PO V1-Intrpt N1	PO V1-Intrpt N2	PO V1-Intrpt N3

PO V2-Intrpt N1	PO V2-Intrpt N2	PO V2-Intrpt N3

PO V3-Intrpt N1	PO V3-Intrpt N2	PO V3-Intrpt N3

Optionally, the data below can be recorded at every Interruption event by Data Recorder 35:

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

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Power Quality: ION Meters and EN50160 Technical Note

7500, 7600 specifications

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Multi-Tech Systems 7600, 7500 Short and Long Interruptions, Interruptions Default Measurements

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ION 7500 / ION 7600 User’s Guide