MSI 5000V Master-S Manuale Utente Scaricare il pdf (Pagina 88)

88 Rockwell Automation Publication 1426-UM001G-EN-P - November 2014

Chapter 5 Power Quality Monitoring

• PowerQuality.V3_V1_Volts_H3_Ang (64…95, M8 model)

• PowerQuality.V3_V1_Volts_H4_Ang (96…127, M8 model)

• PowerQuality.I1_Amps_H1_Ang (DC…31)

• PowerQuality.I1_Amps_H2_Ang (32…63)

• PowerQuality.I1_Amps_H3_Ang (64…95, M8 model)

• PowerQuality.I1_Amps_H4_Ang (96…127, M8 model)

• PowerQuality.I2_Amps_H1_Ang (DC…31)

• PowerQuality.I2_Amps_H2_Ang (32…63)

• PowerQuality.I2_Amps_H3_Ang (64…95, M8 model)

• PowerQuality.I2_Amps_H4_Ang (96…127, M8 model)

• PowerQuality.I3_Amps_H1_Ang (DC…31)

• PowerQuality.I3_Amps_H2_Ang (32…63)

• PowerQuality.I3_Amps_H3_Ang (64…95, M8 model)

• PowerQuality.I3_Amps_H4_Ang (96…127, M8 model)

• PowerQuality.I4_Amps_H1_Ang (DC…31)

• PowerQuality.I4_Amps_H2_Ang (32…63)

• PowerQuality.I4_Amps_H3_Ang (64…95, M8 model)

• PowerQuality.I4_Amps_H4_Ang (96…127, M8 model)

Sag and Swell Detection

The PowerMonitor 5000 unit continually monitors line voltages and sets an

alarm flag when the voltage varies below (sag) or above (swell) a predetermined

threshold, expressed as a percentage of the nominal system voltage. The

PowerMonitor 5000 models detect and report sags and swells in different ways:

• The M5 model detects sags and swells and reports them in the Alarm Log.

• The M6 and M8 models retain the simple sag/swell capabilities of the

M5 model but also permit you to adjust sag and swell thresholds. In

addition, fixed sag and swell thresholds corresponding to definitions found

in IEEE 1159 and EN 50160 independently detect and report sags and

swells. When sags or swells are detected, these models record waveforms

and record detailed event information in the Power Quality Log.

Setup

Basic metering configuration is required:

• All models include fixed thresholds for sag and swell alarming: 90% of

nominal for sags, 110% of nominal for swells, each with a 2% of nominal

hysteresis.

• In the M6 and M8 models, multi-level sag and swell thresholds and

hysteresis are user-configurable and can be adjusted by use of the

Configuration.PowerQuality web page or data table. The parameters are

listed in Ta bl e 1 4

. Defaults have been selected to effectively disable user-

configurable sag and swell detection, to avoid creating redundant events in

the Power Quality Log.

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MSI 5000V Master-S Manuale Utente Pagina 88

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