Fault Finding
104
11.5 INSTRUMENTS
SYMPTOM POSSIBLE REMEDY
Inaccurate generator
measurements on controller
display
Check that the CT primary, CT secondary and VT ratio settings are
correct for the application.
Check that the CTs are wired correctly with regards to the direction
of current flow (p1,p2 and s1,s2) and additionally ensure that CTs are
connected to the correct phase (errors will occur if CT1 is connected
to phase 2).
Remember to consider the power factor. Ie (kW = kVA x
powerfactor)
The controller is true RMS measuring so gives more accurate display
when compared with an ‘averaging’ meter such as an analogue panel
meter or some lower specified digital multimeters.
Accuracy of the controller is better than 1% of full scale. Ie Gen volts
full scale is 333V ph-n so accuracy is ±3.33V (1% of 333V).
11.6 MISCELLANEOUS
SYMPTOM POSSIBLE REMEDY
Module appears to ‘revert’ to
an earlier configuration
When editing a configuration using the PC software it is vital that the
configuration is first ‘read’ from the controller before editing it. This
edited configuration must then be “written” back to the controller for
the changes to take effect.
When editing a configuration using the fascia editor, be sure to press
the Accept button to save the change before moving to another
item or exiting the fascia editor
NOTE:- The above fault finding is provided as a guide check-list only. As the module can
be configured to provide a wide range of different features, always refer to the source of your
module configuration if in doubt.
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