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ABB RELION Series - Standard Inverse-Time Characteristics for Overvoltage Protection

ABB RELION Series
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GUID-90BAEB05-E8FB-4F8A-8F07-E110DD63FCCF V1 EN
Figure 405: Operate time curve based on IDMT characteristic with Minimum
operate time set to 1 second
11.3.1.1 Standard inverse-time characteristics for overvoltage protection
The operate times for the standard overvoltage IDMT curves are defined with the
coefficients A, B, C, D and E.
The inverse operate time can be calculated with the formula:
1MRS758755 A Section 11
General function block features
REC615 and RER615 747
Technical Manual

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