Siemens siprotec SJ62, Руководство пользователя

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2.2 Overcurrent Protection 50, 51, 50N, 51N
82
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Note
For an interaction between the automatic reclosure (AR) and the control function, an
extended CFC logic is necessary. See margin heading „CLOSE command: Directly or
via control“ in the Setting Notes of the AR function (Section 2.14.6).
Interaction with Au-
tomatic Reclosure
Function (Phases) When reclosing occurs, it is desirable to have high speed protection against faults with
50-2. If the fault still exists after the first reclosure, elements 50-1 or 51 will be initiated
with graded tripping times, that is, the 50-2 elements will be blocked. At address
1214
50-2 active
, it can be specified whether (
with 79 active
) or not (
Always
) the
50-2 elements should be supervised by the status of an internal or external automatic
reclosing device. Address
with 79 active
determines that the 50-2 elements will
not operate unless automatic reclosing is not blocked. If not desired, then setting
Always
is selected having the effect that the 50-2 elements will always operate, as
configured.
The integrated automatic reclosing function of 7SJ62/63/64 also provides the option
to individually determine for each time overcurrent element whether tripping or block-
ing is to be carried out instantaneously, unaffected by the AR with time delay (see
Section 2.14).
Interaction with Au-
tomatic Reclosing
Function (ground) When reclosing is expected, it is desirable to have high speed protection against faults
with 50N-2. If the fault still exists after the first reclosure, elements 50N-1 or 51N must
operate with graded tripping times, that is, the 50N-2 elements will be blocked. At
address
1314 50N-2 active
, it can be specified whether (
with 79 active
) or
not (
Always
) the 50N-2 elements should be supervised by the status of an internal or
external automatic reclosing device. Address
with 79 active
determines that the
50N-2 elements will only operate when automatic reclosing is not blocked. If not de-
sired, then setting
Always
is selected having the effect that the 50N-2 elements will
always operate, as configured.
The integrated automatic reclosing function of 7SJ62/63/64 also provides the option
to individually determine for each time overcurrent element whether tripping or block-
ing is to be carried out instantaneously, unaffected by the AR with time delay (see
Section 2.14).
2.2.11 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under "Dis-
play Additional Settings".
The table indicates region-specific default settings. Column C (configuration) indicates
the corresponding secondary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
1201 FCT 50/51 ON
OFF ON 50, 51 Phase Time Over-
current
1202 50-2 PICKUP 1A 0.10 .. 35.00 A;
∞
2.00 A 50-2 Pickup
5A 0.50 .. 175.00 A;
∞
10.00 A
1203 50-2 DELAY 0.00 .. 60.00 sec;
∞
0.00 sec 50-2 Time Delay