ABB RET650 Technical Manual page 656

Relion 650 series transformer protection
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Section 21
Time inverse characteristics
650
GUID-ACF4044C-052E-4CBD-8247-C6ABE3796FA6 V1 EN
Figure 287:
Inverse curve A characteristic of overvoltage protection
1MRK 504 135-UEN A
Technical manual

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