ABB RELION REX640 Technical Manual page 491
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- Technical manual (1960 pages) ,
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1MRS759142 C
REX640
Technical Manual
GUID-7E96C44F-425D-4057-9046-F34EC9A6DC97 V1 EN
Figure 266:
Measured current as a function of the rotor earth-fault resistance with
various field-to-earth capacitance values with the measuring circuit
resistance R
used.
= 3.0 Ω, f
= 50 Hz. Only one coupling capacitor is
m
n
Section 4
Protection functions
485
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