KMB NOVAR 2600, Operating Manual

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NOVAR 2600 Operating Manual
3. Commissioning
3.1 Setup
When switching on the power supply, the instrument will display manufacturer's logo for short time and
after that, usually
the power factor control screen is displayed :
As neither output types nor reactive power sizes of individual outputs are known now, the instrument
gets into the
standby mode, which is signalled by flashing -indicator in the upper right corner of the
screen.
If both all of measuring voltages are present and all of measured currents reach at least minimum
level, the instrument tries to start
automatic output recognition ( AOR ) process that is presented with
„Automatic Output Recognition will be started in XX seconds“ message; if the message appears,
cancel the process with the

-button.
At this moment, before we let this process run it is necessary to set group of parameters - so called
Installation group - that are essential for proper operation of the instrument :
• mode of connection ( direct measuring or via metering voltage transformers )
• type of connection ( star, delta, Aron )
• ratios of CT and VT and their multipliers (if used)
• nominal voltage U
NOM
and nominal frequency f
NOM
• I
NOM
, P
NOM
(not mandatory, but recommended)
3.1.1 Measured Electrical Quantities Installation Setup
For the proper data evaluation it is necessary to set all of the Installation Setting group
parameters.
• Connection Mode determines if voltage signals are connected directly or if voltage
transformers are used.
• Connection Type needs to be set according network configuration – wye (or star, Y ) or
delta ( D , if neutral voltage potential not connected ). Usually, all of three phases are
connected so choose 3-Y or 3-D . For Aron connection set 3-A . For single-phase connection,
set 1Y3 or 1D3 .
• CT - ratios must be specified, in case of “ via VT ” connection mode VT -ratios too.
The VT-ratios must be set in form Nominal primary voltage / Nominal secondary voltage . For
higher primary voltage values the U-multiplier must be used too.
CT ratios can be set in form either …/ 5A or …/ 1A.
• I- and U-Multiplier - You can modify the CT- / VT-ratio with this parameter. For example, to
get better precision when using overweighted CTs, you can apply more windings of
measured wire through the transformer. Then you must set the multiplier. For example, for 2
windings applied, set the multiplier to 1/2 = 0.5 .
For standard connection with 1 winding, the multiplier must be set to 1.
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