DSE DSE8661, Operator'S Manual, Page: 114 / 120

Fault Finding
114
10.2 INSTRUMENTS
Symptom Possible Remedy
Inaccurate measurements on
controller display
Check:
•
That the CT primary, CT secondary and VT ratio settings are
correct for the application.
• 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 occur if CT1
is connected to phase 2).
•
Remember to consider the power factor:
(kW = kV A x Power Factor)
•
The DSE8xxx series are 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.
Voltage full scale is 333 V ph-N so accuracy is ±3.33 V (1%
of 333 V).
10.3 LOADING
Symptom Possible Remedy
Bus does not take load
Check:
•
The generator bus available LED is lit
•
That the output configuration is correct to drive the generator
bus switch and that all connections are correct.
•
Remember that the generator bus does not take load in
Manual Mode unless the mains supply fails, a remote
start on load input is present or the Transfer to Generator
Bus is pressed.
Inaccurate measurements on
controller display
Check:
•
That the CT primary, CT secondary and VT ratio settings are
correct for the application.
•
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 occur if CT1
is connected to phase 2).
• Remember to consider the power factor:
(kW = kV A x Power Factor)
•
The DSE8xxx series are 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.
Voltage full scale is 333 V ph-N so accuracy is ±3.33 V (1%
of 333 V).