Differential protection functions and protection functions that pick up on unbalanced currents are blocked.
Each individual protection function is responsible for the actual blocking and is described there, too.
When using the fast measuring transducer inputs as 4 mA to 20 mA inputs, broken-wire detection is active.
With a < 2 mA current, wire breaks are detected and the
wire break
indication is set. The measured values
display remains unaffected.
Application and Setting Notes
Parameter: Mode
•
Recommended setting value (_:1) Mode = off
The Mode parameter is used to switch the broken-wire detection to on, off and test.
Parameter: Mode of blocking
•
Recommended setting value (_:101) Mode of blocking = blocking
The Mode of blocking parameter enables you to define the blocking condition (see Blocking the protec-
tion). Siemens recommends using the default setting. The setting options are blocking, auto blocking
and not blocking.
Parameter: Delta value for autoblock
•
Recommended setting value (_:102) Delta value for autoblock = 1.00 I/IN
With the Delta value for autoblock parameter you can make the blocking decision for protection func-
tions dependent on the amount of the differential current.
Settings
Addr.
Parameter C Setting Options Default Setting
Brk.wire det.
_:1 Brk.wire det.:Mode
•
off
•
on
•
test
off
_:101 Brk.wire det.:Mode of
blocking
•
blocking
•
auto blocking
•
not blocking
blocking
_:102 Brk.wire det.:Delta value for
autoblock
0.004 to 5.000 1.000
Information List
No.
Information Data Class
(Type)
Type
Brk.wire det.
_:82 Brk.wire det.:>Block function SPS I
_:54 Brk.wire det.:Inactive SPS O
_:52 Brk.wire det.:Behavior ENS O
_:53 Brk.wire det.:Health ENS O
_:301 Brk.wire det.:Phs A BW suspected SPS O
_:302 Brk.wire det.:Phs B BW suspected SPS O
_:303 Brk.wire det.:Phs C BW suspected SPS O
_:304 Brk.wire det.:Phase A broken wire SPS O
_:305 Brk.wire det.:Phase B broken wire SPS O
_:306 Brk.wire det.:Phase C broken wire SPS O
8.3.5.4
8.3.5.5
8.3.5.6
Supervision Functions
8.3 Supervision of the Secondary System
SIPROTEC 5, Fault Recorder, Manual 383
C53000-G5040-C018-5, Edition 11.2017
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