17-4
IM DL850E-01EN
Analysis Mode (Analysis Mode)
Select the system to be analyzed.
• 1 Wiring System: One system is analyzed.
• 2 Wiring Systems: Two systems are analyzed. The primary and secondary sides of the system to be analyzed
can be measured to derive the efficiency.
• OFF: Power analysis is disabled.
• Device’s power factor example
PΣ of
Wiring System 1
PΣ of
Wiring System 2
Inverter or
similar device
Input power
Output power
Setting Analysis Conditions (Wiring System)
Set the wiring system, math source waveforms, and analysis method (measurement period, analysis conditions,
and efficiency).
Wiring System (Wiring)
The following eight wiring systems are available on the DL850E/DL850EV.
:
Single-phase two-wire
:
Single-phase three-wire
:
Three-phase three-wire
Three-voltage three-current measurement method
:
Three-phase four-wire
:
Conversion of three-phase three-wire system data to the three-voltage three-current
measurement method
Delta-star transformation using three-phase three-wire system data
:
Star-delta transformation using three-phase four-wire system data
To apply voltage, use a passive probe.
For details on how to select the appropriate passive probes and how to connect them (high and low), see
section 3.5 in the Getting Started Guide, IM DL850E-03EN.
To apply current, use a current probe.
For details on how to select the appropriate current probes and how to connect them (current direction), see
section 3.5 in the Getting Started Guide, IM DL850E-03EN, and the user’s manual that came with the current
probe.
17 Power Math