Measurement Modes; Timer Characteristics - ABB 615 series Technical Manual

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1MAC059074-MB A

615 series ANSI

Technical Manual

Measurement modes

The function operates on four alternative measurement modes: "RMS", "DFT", "Peak-to-

Peak" and "P-to-P + backup". Additionally, there is "Wide P-to-P" measurement mode in

some products variants. The measurement mode is selected with the setting Measurement

Measurement modes supported by 51P/50P stages

Measurement mode

Peak-to-Peak

P-to-P + backup

1) Available only in REG615 standard configurations C and D

For a detailed description of the measurement modes, see the

Measurement modes

51P, 50P, 50P-3 supports both DT and IDMT characteristics. The user can select the timer

characteristics with the Operating curve type and Type of reset curve settings. When the

DT characteristic is selected, it is only affected by the Trip delay time and Reset delay time

The protection relay provides 16 IDMT characteristics curves, of which seven comply

with the IEEE C37.112 and six with the IEC 60255-3 standard. Two curves follow the

special characteristics of ABB praxis and are referred to as RI and RD. In addition to this,

a user programmable curve can be used if none of the standard curves are applicable. The

DT characteristics can be chosen by selecting the Operating curve type values "ANSI Def.

Time" or "IEC Def. Time". The functionality is identical in both cases.

The timer characteristics supported by different stages comply with the list in the IEC

61850-7-4 specification, indicate the characteristics supported by different stages:

section in this manual.

Protection functions

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