Page 134 - SACE Tmax XT - Catalogue

5/8 SACE TMAX XT LOW VOLTAGE MOLDED CASE CIRCUIT-BREAKERS

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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 Hi-Touch also generates an
ceeded, the Ekip Hi-Touch generates a signaling alarm if the THD value or a magnitude of at least
event. The number of these events is stored in a one of the harmonics exceeds the values set.
suitable counter. The counter values are avail- The voltage and current values are monitored
able for each of last 7 days, as well as the total. on all phases.
The measures available are the positive and neg-
ative sequence voltages and positive and nega- All information can be displayed directly on the
tive sequence currents of the last interval moni- screen (for the XT5, XT7, XT7 M) or on a smart-
tored. The time of the calculation of the average phone, a PC or in a network system with any of
values can be set between 5 minutes and 2 hours. the communication modules. This is an embed-
• Interruptions / short dips in voltage: if the ded function of Ekip Touch trip units and analyzes
voltage remains below a threshold for more important parameters of the distribution network
than 40ms, the Ekip Hi-Touch generates an including:
event that is counted in a dedicated log. The • The average Voltage value
voltage is monitored on all lines. • Short Voltage interruptions and spikes
• Short voltage spikes (voltage transients, • Slow Voltage sags and swells
spikes): if the voltage exceeds a threshold for • Voltage unbalance
40ms, set for a pre-determined time, the Ekip • Harmonic analysis
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.