Overview; 1-Phase Measurement; Direct Connection - Fluke NORMA 4000 Operator's Manual

NORMA 4000/5000
Operators Manual

Overview

The Fluke NORMA 4000/5000 Power Analyzer offers the following options for
connection:
When connecting a 4-channel device for electrical efficiency analysis, the
3-phase power cables for this measurement should be connected to the
measuring channels 1 to 3, so that the efficiency can be calculated and
displayed directly on the Power Analyzer.

1-Phase Measurement

Direct Connection

To avoid possible electric shock or personal injury:
The difference between the connection of the voltage input between the current input and
the mains (Figure 5-1) or between the current input and the load (Figure 5-2) is that, in
the first case, the leakage power of the current input, and in the second, the leakage
power of the voltage input is added to the measuring result. As the leakage power of the
current input may increase up to ~2 W at 10 amp versus a leakage power of the voltage
input of 0.5 W at 1000 V, it is preferable to use the second method. It is used for the
further diagrams, also in Aron and 3-phase measurements. For special applications such
as active current sensors without power loss or higher leakage power at the voltage input
with the "star point adapter," method 1 is preferable.
5-4

1-phase measurement

Aron circuit (W2)
3-phase measurement (W3)
Ensure that there is no overload at the current input of the Power Analyzer.
If necessary, install appropriate fuses.
Risk of injury when touching connections, internal circuits
and measuring devices that are not connected to earth
ground.
Always adhere to the instructions regarding the sequence
of connection (see Chapter 5, "Connecting Sequence").
Note
XW Warning