SACE EMAX 2 NEW LOW VOLTAGE POWER C I RCUI T BRE AKERS TO ANS I C37 / UL 1066 / CSA STANDARDS
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— Energy Measurements Network Analyzer
Operating Principle The Network Analyzer function performs continu- ous monitoring of the quality of energy, and shows all results through a display or communication module. In particular: • Hourly average voltage value: in accordance with international Standards, this must remain within 10% of the rated value, but different limits can be defined according to the needs of the installation. The positive sequence voltage is compared with the limits. If the limits are exceeded, the Ekip Touch trip units generates a signaling event. The number of these events is stored in a counter. The counter values are available for each of last 7 days, as well as the total. The measures available are the positive and negative sequence voltages and positive and negative sequence currents of the last interval monitored. The time of the calcu- lation of the average values can be set between 5 minutes and 2 hours. • Interruptions / short dips in voltage: if the volt- age remains below a threshold for more than 40ms, the Ekip Touch trip units generates an event that is counted in a dedicated log. The volt- age is monitored on all lines. • Short voltage spikes (voltage transients, spikes): if the voltage exceeds a threshold for 40ms, set for a pre-determined time, the Ekip Hi-Touch gen- erates 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 volt- age remains within a curve of values that are ac- ceptable by equipment such as computers. The voltage is monitored on all lines.
• Voltage imbalances: if the voltage values are not equal or the phase displacements between them are not exactly 120°, an imbalance occurs, which is manifested with a negative sequence voltage value. If this limit exceeds the threshold value set, an event is stored which is counted. • Harmonic analysis: the harmonic content of volt- ages and currents, measured to the 50th har- monic, as well as the value of the total harmonic distortion (THD), are available in real time on the display or through the communication modules. The Ekip Touch trip units also generates an alarm if the THD value or a magnitude of at least one of the harmonics exceeds the values set. The voltage and current values are monitored on all phases. All information can be displayed directly on the screen or on a smartphone, a PC or in a network system with any of the communication modules. This is an embedded function of Ekip Touch trip units and analyzes important parameters of the dis-
tribution network including: • The average Voltage value • Short Voltage interruptions and spikes • Slow Voltage sags and swells
• Voltage imbalance • Harmonic analysis
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