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Section 4
1MAC050144-MB C
Protection functions
176
615 series ANSI
Technical Manual
Table 163: Reset time characteristics supported by different stages
4.1.6.8
Directional ground-fault characteristics
Phase angle characteristic
The operation criterion phase angle is selected with the
Operation mode
setting using the
value "Phase angle".
When the phase angle criterion is used, the function indicates whether the operating
quantity is within the forward or reverse operation sector or within the non-directional
sector.
The forward and reverse sectors are defined separately. The forward operation area is
limited with the
Min forward angle
and
Max forward angle
settings. The reverse operation
area is limited with the
Min reverse angle
and
Max reverse angle
settings.
In the forward operation area, the
Max forward angle
setting gives the clockwise sector
and the
Min forward angle
setting correspondingly the anti-clockwise sector, measured
from the
Characteristic angle
setting.
In the reverse operation area, the
Max reverse angle
setting gives the clockwise sector and
the
Min reverse angle
setting correspondingly the anti-clockwise sector, measured from
the complement of the
Characteristic angle
setting (180 degrees phase shift) .
The relay characteristic angle (RCA) is set to positive if the operating current lags the
polarizing quantity. It is set to negative if it leads the polarizing quantity.
Reset curve type
Supported by
67/51N and 67/50N-1
67/50N-2
Note
(1) Immediate
x
x
Available for all operate
time curves
(2) Def time reset
x
x
Available for all operate
time curves
(3) Inverse reset
x
x
Available only for ANSI
and user programmable
curves
The sector limits are always given as positive degree values.
Содержание 615 Series ANSI
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Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
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Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
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