Table of Contents
Advertisement
Harmonics
mode displays harmonic levels of voltage, current, and apparent power, order by order. This lets you determine the
harmonic currents produced by nonlinear loads, and analyze problems caused by harmonics according to their order (overheating of
neutrals, conductors, motors, etc.).
Apparent power harmonics (§6.3).
Current harmonics (§6.2).
Phase- to-neutral voltage
harmonics (§6.1).
6.1. PHASE-TO-NEUTRAL VOLTAGE
The V sub-menu displays the harmonics of the phase-to-neutral voltage only for sources having a neutral.
The choice of graphs to be displayed depends on the type of connection (see §4.6):
■
Single-phase, 2-wire: no choice (L1)
■
Single-phase, 3-wire: L1, N
■
Split-phase, 3-wire: 2L, L1, L2
■
Split-phase, 4-wire: 2L, L1, L2, N
■
Three-phase, 4-wire: 3L, L1, L2, L3, -,+
■
Three-phase, 5-wire: 3L, L1, L2, L3, N, -,+
The screen captures shown as examples below are those obtained with a 5-wire three-phase connection.
6.1.1. 3L PHASE-TO-NEUTRAL VOLTAGE HARMONICS DISPLAY SCREEN
Information about the harmonic at
the cursor position.
V-h03: harmonic number.
%: level of harmonics with the
fundamental RMS value as
reference (%f) or the (total) RMS
value as reference (%r).
V: RMS voltage of the harmonic
in question.
+000°: phase shift with respect to
the fundamental (order 1).
Harmonic selection cursor. Use the
or button to move the cursor.
6.
HARMONICS
Figure 6-1
Figure 6-2
48
Filters and expert mode (§6.5). Use the
or button to make selections.
Phase-to-phase voltage harmonics
(§6.4).
Display of 3 phases 3L, of L1, L2, L3,
N, or of expert mode (three-phase
connection only – see §6.5). To select
the display press the or button.
Horizontal axis indicates the orders of
the harmonics. The level of the
harmonic is calculated as a percentage
with respect to the fundamental or to
the total RMS value.
DC: DC component.
1 to 25: harmonics of order 1 to 25.
When the cursor exceeds order 25,
orders 26 to 50 appear.
Advertisement
Table of Contents
