ABB RELION 630 Series Applications Manual

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Contents

ABB RELION 630 Series Applications Manual Manual pdf 42 page image

Also a separate start and operate signal from both instances is connected to thedisturbance recorder.The residual overvoltage function is blocked on detection of fuse failure.3.2.6.8 Three-phase overvoltage protection PHPTOVThe three-phase overvoltage protection function is used for phase-to-phase or phase-to-earth overvoltage protection with DT or IDMT characteristics.The configuration includes two instances of phase overvoltage function blocks. A setof three phase voltages, U3P is connected to the inputs.A common operate and start signal from the both phase overvoltage protectionfunctions are connected to an OR-gate to form a combined phase overvoltage operateand start signal which provides a LED indication on the LHMI. Also a separate startand operate signal from the both instances is connected to the disturbance recorder.3.2.6.9 Three-phase undervoltage protection PHPTUVThe three-phase undervoltage protection function is used for phase-to-phase or phase-to-earth overvoltage protection with DT or IDMT characteristics.The configuration includes two instances of undervoltage function blocks. The set ofthree phase voltages, U3P is connected to the inputs. The undervoltage function isblocked by the fuse failure function.A common operate and start signal from the both phase undervoltage protectionfunctions is connected to an OR-gate to form a combined phase undervoltage operateand start signal, which provides a LED indication on the LHMI. Also a separate startand operate signal from the both instances is connected to the disturbance recorder.Section 3 1MRS757582 CREG630 variants36 REG630Application Manual