5.1.3 Frequency
SPM33 working on different measurement mode, the acquisition channel of
the frequency measurement is not the same. In the triangle connection mode,
SPM33 measures frequency default by AB line voltage channel ; under other
modes, SPM33 measures the frequency by the A phase voltage channel. If
phase A default phase, then take the C phase. If A, C-phase default phase, then
take the B phase.
5.2 Demand Parameters
Demand refers to the value obtained in the following way: the accumulated
electrical parameters within a period of time divided by the time length. To
facilitate the operation of the user, SPM33 adopts the fixed-block calculation
method in the fixed period of time, and the period of time is fixed, being 15
minutes.
SPM33 provides the following demand data and measuring ranges:
15
