Appendix 3: Current Transformer - Ingeteam INGECON SUN EMS Manual De Configuración

Ingeteam

8 Appendix 3: Current Transformer

Current transformer parameters for three-phase installations (A65+ wattmeter).
The parameters indicated below must be considered in order to select the correct current
transformer:
I : Nominal primary current (A)
p
The nominal current on the primary must be greater than or equal to the maximum current per
system phase.
I : Nominal secondary current (A)
s
Nominal current value on the current transformer secondary.
The nominal current of the wattmeter to be connected to the transformer secondary is I
and its maximum current is I
To ensure the wattmeter measures precisely, at least one current transformer with a nominal
secondary current of I
Ingeteam does not guarantee the precision and correct functioning of the
strategy configured in the EMS energy manager when transformers with a
nominal secondary current I
Transformers with a nominal secondary current that is higher than the maximum
current of the wattmeter (i.e. 10 A) may not be used.
KN: Transformation ratio (A)
Ratio between the nominal current of the primary and the nominal current of the secondary. This
is expressed as a fraction. Example: KN = (150 A / 5 A).
Cl: Precision class
The precision class is the percentage current error limit when operating at nominal current.
Ingeteam requires a current transformer precision class of 0.5 (Cl 0.5).
AAX2026IQM05_B.docx
= 10 A.
max
= 5 A must be used.
s
of less than 5 A are used.
s
Configuration manual
= 5 A
n
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