ABB Relion 650 Series REB650 Technical Manual page 555

Busbar protection
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1MRK 505 288-UEN A
Technical manual
GUID-F5E0E1C2-48C8-4DC7-A84B-174544C09142 V1 EN
Figure 242:
Inverse curve B characteristic of overvoltage protection
Time inverse characteristics
Section 19
549

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