Multi-Tech Systems 7600, 7500 manual Magnitude of Voltage Supply

Magnitude of Voltage Supply ION 7500 / ION 7600 User’s Guide

Magnitude of Voltage Supply

Each measurement is the mean of RMS voltage for each phase over fixed 10-minute intervals. The nominal value is defined by the Sag/Swell module’s Nom Volts setup register.

NOTE

Nom Volts is typically setup when the meter is placed into service; if Nom Volts has not been set, enter a value for your system’s nominal voltage. This value will be used in all EN50160 compliance calculations.

Observation period of one week with fixed steps of 10 minutes.

N = number of 10-minute intervals in which the supply voltage is within ±15% of nominal.

N1 = number of intervals in which the supply voltage differs more than 10% from nominal and supply voltage is within ±15% of nominal.

Supply voltage complies with the standard if N1/N <= 5% during the observation period (1 week by default).

EN 50160 data (current observation period): The meter generates the N and N1 counts for each phase as described above. These counters are reset at the beginning of the next observation period.

EN 50160 data (previous observation period): The meter stores the N and N1 counter values at the end of each observation period before these counters are reset. These 6 registers are also stored in a data recorder for each observation period.

Events: The meter creates a message in the Event log every time the N1 counter for each phase increases.

Parameter data: The meter can be enabled to record the 10-minute mean, ½ cycle minimum and ½ cycle maximum values of supply voltage for each phase into a data recorder every 10 minutes.

Page 304 Power Quality: ION Meters and EN50160 Technical Note