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3.3) Auxiliary power supply connections
The Meter derives power from auxiliary power supply terminals
which is seperatly provided in the meter. SMPS circuit is used to power
up the meter so it can work from th range of 90 - 270V AC/DC. The
auxiliary supply should be connected to proper specified voltage.
Burden on Auxiliary supply terminals : 4VA
3.4) Cross checking the wiring
Three phase voltage wiring and current wiring are to be properly
done for correct measurements. Any wrong connections done either
during installation or during rewiring can produce wrong measurement of
electrical parameters. These incorrect wirings are difficult to detect since
they produce wrong readings close to the expected readings.
The Meter has a built in program to identify the reverse sequences
in PTas well as CT wiring. A seperate diagnostic display page is provided
to view the PT, CT Connections. IT can be selected by pressing the Shift
Key repeatedly.
If the PT & CT wiring are done correctly. The diagnostic page as
shows as
Otherwise the phase in which voltage connections or current
connections are wrongly connected is displayed.
While checking the wiring through the diagnostic page, make sure
the load current is 10% above the full scale current and also the load is
in import mode.
Note :
(PT shows “RYB” when sequence connected is correct (RYB, YBR & BRY) or
else shows “RBY’, if sequence connected is incorrect (RBY, YRB & BYR). CT shows
reversal, when CT not synchronised with PT or wiring are Interchanged/Reversed or
Load in Export Mode.
PT SEQ : RYB
CT REVR : NIL
