METREL MI 2893 User Manual

MI 2893 / MI 2892 / MI 2885 Connection setup
141
4.2 Connection setup
4.2.1 Connection to the LV Power Systems
This instrument can be connected to different type of networks. Proper connection should be selected
to obtain the reliable results.
The actual connection scheme has to be defined in CONNECTION SETUP menu (see Figure below).
Figure 106: Connection setup menu
When connecting the instrument, it is essential that both current and voltage connections are correct. In
particular the following rules have to be observed:
Clamp-on current clamp-on transformers
 The arrow marked on the clamp-on current transformer should point in the direction of current
flow, from supply to load.
 If the clamp-on current transformer is connected in reverse the measured power in that phase
would normally appear negative.
Phase relationships
 The clamp-on current transformer connected to current input connector I
1
has to measure the
current in the phase line to which the voltage probe from L
1
is connected.
3-phase 4-wire system (4W)
In order to select this connection scheme, choose following connection on the instrument:
Figure 107: Choosing 3-phase 4-wire system on instrument
Instrument should be connected to the network according to figure below:

METREL MI 2893 Specifications

General

Brand	METREL
Model	MI 2893
Category	Measuring Instruments
Language	English