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Section 4
1MAC050144-MB C
Protection functions
184
615 series ANSI
Technical Manual
• The
Max forward angle
and
Max reverse angle
settings are not settable, but have a
fixed value of 88 degrees
• The sector limits of the fixed sectors are rounded.
Sector rounding in the phase angle classic 88 consists of three parts:
• If the current amplitude is between 1...20 percent of the nominal current, the sector
limit increases linearly from 73 degrees to 85 degrees
• If the current amplitude is between 1...100 percent of the nominal current, the sector
limit increases linearly from 85 degrees to 88 degrees
• If the current amplitude is more than 100 percent of the nominal current, the sector
limit is 88 degrees.
Figure 86:
Operating characteristic for phase angle classic 88
There is no sector rounding on the other side of the sector.
If the current amplitude falls below one percent of the nominal current, the
direction enters the non-directional area.
RCA
Non-operating area
Max forward angle
Min forward angle
Min reverse angle
88 deg
20% nominal
amplitude
100% nominal
amplitude
1% nominal
amplitude
Max reverse angle
88 deg
0
I
0
-V
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
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 ...
Page 712: ......