Page 102 - Sace Emax 2 Catalogue

5/24 SACE EMAX 2 LOW VOLTAGE AIR CIRCUIT-BREAKERS

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Energy Measurements

Network Analyzer

Operating Principle • Voltage unbalances: if the voltage values are
not equal or the phase displacements between
The Network Analyzer function performs continu- them are not exactly 120°, an unbalance occurs,
ous monitoring of the quality of energy, and which is manifested with a negative sequence
shows all results through a display or communica- voltage value. If this limit exceeds the threshold
tion module. In particular: value set, an event is stored which is counted.
• Hourly average voltage value: in accordance • Harmonic analysis: the harmonic content of
with international Standards, this must remain voltages and currents, measured to the 50th
within 10% of the rated value, but different lim- harmonic, as well as the value of the total har-
its can be defined according to the needs of the monic distortion (THD), are available in real time
installation. The positive sequence voltage is on the display or through the communication
compared with the limits. If the limits are ex- modules. The Ekip Touch trip units also gener-
ceeded, the Ekip Touch trip units generates a ates an alarm if the THD value or a magnitude of
signaling event. The number of these events is at least one of the harmonics exceeds the val-
stored in a suitable counter. The counter values ues set. The voltage and current values are mon-
are available for each of last 7 days, as well as itored on all phases.
the total. The measures available are the positive
and negative sequence voltages and positive All information can be displayed directly on the
and negative sequence currents of the last in- screen or on a smartphone, a PC or in a network
terval monitored. The time of the calculation of system with any of the communication modules.
the average values can be set between 5 minutes This is an embedded function of Ekip Touch trip
and 2 hours. units and analyzes important parameters of the
• Interruptions / short dips in voltage: if the distribution network including:
voltage remains below a threshold for more • The average Voltage value
than 40ms, the Ekip Touch trip units generates • Short Voltage interruptions and spikes
an event that is counted in a dedicated log. The • Slow Voltage sags and swells
voltage is monitored on all lines. • Voltage unbalance
• Short voltage spikes (voltage transients, • Harmonic analysis
spikes): if the voltage exceeds a threshold for
40ms, set for a pre-determined time, the Ekip
Hi-Touch generates an event that is counted.
• Slow voltage sags and swells: when the voltage
strays outside a range of acceptable limit values
for a time greater than the one set, the Ekip Hi-
Touch generates an event that is counted. Three
values can be configured for voltage sags and
two for voltage swells, each associated with a
time limit: this enables verification of whether
the voltage remains within a curve of values that
are acceptable by equipment such as computers.
The voltage is monitored on all lines.