Section 4
1MAC050144-MB C
Protection functions
156
615 series ANSI
Technical Manual
Blocking logic
There are three operation modes in the blocking functionality. The operation modes are
controlled by the
BLOCK
input and the global setting
"Configuration/System/
Blocking
mode
"
which selects the blocking mode. The
BLOCK
input can be controlled by a binary
input, a horizontal communication input or an internal signal of the relay program. The
influence of the
BLOCK
signal activation is preselected with the global setting
Blocking
mode
.
The
Blocking mode
setting has three blocking methods. In the "Freeze timers" mode, the
trip timer is frozen to the prevailing value. In the "Block all" mode, the whole function is
blocked and the timers are reset. the "Block TRIP output" mode, the function operates
normally but the
TRIP
output is not activated.
4.1.4.5
Measurement modes
The function operates on three alternative measurement modes: "RMS", "DFT" and
"Peak-to-Peak". The measurement mode is selected with the
Measurement mode
setting.
Table 135: Measurement modes supported by 51N/50N or 51G/50G stages
4.1.4.6
Timer characteristics
51N/50N or 51G/50G 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
settings.
The IED 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 user
can choose the DT characteristic by selecting the
Operating curve type
values "ANSI Def.
Time" or "IEC Def. Time". The functionality is identical in both cases.
The following characteristics, which comply with the list in the IEC 61850-7-4
specification, indicate the characteristics supported by different stages:
Measurement
mode
Supported measurement modes
51N/G
50N/G-1/2
50N/G-3
RMS
x
x
DFT
x
x
Peak-to-Peak
x
x
x
For a detailed description of the measurement modes, see the General
function block features section in this manual.
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
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Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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