Functions
6-52
7SJ63 Manual
C53000-G1140-C120-1
Interaction with
Automatic
Reclosing
Equipment
At address
DFWLYH
, it can be specified whether or not the 67-2 elements
should be supervised by the status of internal or external automatic reclosing device.
If address
is set to
:LWK$FWLYH
, the 67-2 elements will not operate unless
automatic reclosing is enabled. If address
is set to
$OZD\V
, the 67-2 elements
will always operate.
When reclosing occurs, it is desirable to have high speed protection against temporary
faults. With address
set to
:LWK$FWLYH
, the 67-2 elements may be set for
high speed tripping. If the fault still exists after the first reclose, the 67-2 elements can
be blocked and the 67-1 and/or 67-TOC elements will provide time delay tripping. For
those situations where reclosing is disabled, the 67-2 elements are blocked and the
67-1 and/or 67-TOC elements provide time delay tripping. In summary, setting ad-
dress
to
:LWK$FWLYH
defeats one-shot, high-speed tripping via the 67-2
element for those situations where automatic reclosing is disabled.
When an external automatic reclosing device is utilized, a signal indicating that the de-
vice is enabled must be transmitted to the 7SJ63 relay via a binary input.
Direction Limit Line
and Directional
Orientation
At address
1RUPDO/RDG
, the directional limit line may be set as inductive
(135
), resistive (90
), or capacitive (45
) (see Figure 6-27). As a rule, the option in-
ductive (135
) is used since power system elements are inductive by nature.
The directional orientation may be established at address
'LUHFWLRQ
. Di-
rectional overcurrent protection normally operates in the direction of the facility to be
protected (line, transformer, etc.). If the device is properly connected in accordance
with one of the circuit diagrams in Appendix A3, this is the
forward
direction.
If the voltage used to determine fault direction drops below the minimum value, record-
ed voltage values are available from a buffer based on the last two cycles of sufficient
voltage. If recorded voltage is not available due to closing in on a fault, tripping will take
place without directional determination.
Figure 6-27
Definition of the Directional Limit Line (addresses
and
)
User Specified
Curves
If address
72&
was set to
8VHU'HILQHG3LFNXS&XUYH
or
8VHU
'HILQHG3LFNXSDQG5HVW&XUYH
during configuration of the user-specified
curve option, a maximum of 20 value pairs (current and time) may be entered at ad-
dress
to represent the time-current characteristic curve associated with the 67-
TOC element. This option allows point-by-point entry of any desired curve.
If address
was set to
8VHU'HILQHG3LFNXSDQG5HVHW&XUYH
during
configuration of the user-specified curve option, additional value pairs (current and re-
set time) may be entered at address
0RI385HV77S
to represent the reset
curve associated with the 67-TOC element.
Current and time values are entered as multiples of the address
and
set-
tings. Therefore, it is recommended that addresses
and
be initially set to
R
jX
,1'8&7,9(
R
jX
5(6,67,9(
R
jX
&$3$&,7,9(
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Содержание siprotec 7SJ63
Страница 16: ...xiv 7SJ63 Instruction Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 28: ...Introduction 1 12 7SJ63 Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 112: ...SIPROTEC 4 Devices 4 38 7SJ63 Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 346: ...Functions 6 182 7SJ63 Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 494: ...Technical Data 10 48 7SJ63 Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 604: ...Index Index 6 7SJ63 Instruction Manual C53000 G1140 C120 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...