Table 141:
Relay characteristic angle control in the IoSin and IoCos operation criteria
Operation mode:
RCA_CTL
= "False"
RCA_CTL
= "True"
IoSin
Actual operation criterion: Iosin(φ) Actual operation criterion:
Iocos(φ)
IoCos
Actual operation criterion:
Iocos(φ)
Actual operation criterion: Iosin(φ)
When the Iosin(φ) or Iocos(φ) criterion is used, the component indicates a forward- or
reverse-type fault through the
FAULT_DIR
and
DIRECTION
outputs, in which 1 equals
a forward fault and 2 equals a reverse fault. Directional operation is not allowed (the
Allow
non dir
setting is "False") when the measured polarizing or operating quantities are not
valid, that is, when their magnitude is below the set minimum values. The minimum
values can be defined with the
Min trip current
and
Min trip voltage
settings. In case of
low magnitude, the
FAULT_DIR
and
DIRECTION
outputs are set to 0 = unknown,
except when the
Allow non dir
setting is "True". In that case, the function is allowed to
operate in the directional mode as non-directional, since the directional information is
invalid.
The calculated Iosin(φ) or Iocos(φ) current used in direction determination can be read
through the
I_OPER
monitored data. The value can be passed directly to a decisive
element, which provides the final pickup and trip signals.
The
I_OPER
monitored data gives an absolute value of the calculated
current.
The following examples show the characteristics of the different operation criteria:
Example 1.
Iosin(φ) criterion selected, forward-type fault
=> FAULT_DIR = 1
Section 4
1MRS240050-IB C
Protection functions
188
REF615R
Technical Manual
Summary of Contents for RELION REF615R
Page 1: ... RELION PROTECTION AND CONTROL REF615R Technical Manual ...
Page 2: ......
Page 27: ...Section 18 Glossary 653 Table of contents REF615R 21 Technical Manual ...
Page 28: ...22 ...
Page 36: ...30 ...
Page 46: ...40 ...
Page 115: ...3 15 4 Settings 1MRS240050 IB C Section 3 Basic functions REF615R 109 Technical Manual ...
Page 118: ...112 ...
Page 318: ...312 ...
Page 388: ...382 ...
Page 456: ...450 ...
Page 520: ...514 ...
Page 652: ...646 ...
Page 656: ...650 ...
Page 658: ...652 ...
Page 663: ...657 ...