Siemens 6MD85, Manual

Page: 1026 / 1256

Application and Setting Notes
Parameter:
Exponent
•
Default setting
(_:11371:101) Exponent
=
2.0
You use the
Exponent
parameter to specify the exponent for the ΣI x method.
A typical value is the default setting of 2. However, due to practical experiences with individual circuit
breakers, slightly different values may be requested.
Parameter:
Threshold
•
Default setting
(_:11371:102) Threshold
=
10 000.00
You use the parameter
Threshold
to define the threshold of the statistic value.
The relation of the tripping current powers to the exponentiated rated normal current I
rated
allows the limiting
value of the ΣI x method to correspond to the maximum number of make-break operations. For a circuit
breaker, whose contacts have not yet been worn, the maximum number of make-break operations can be
entered directly as limiting value.
Settings
Addr. Parameter C Setting Options Default Setting
ΣIx-method
_:11371:1 ΣIx-method:Mode
•
off
•
on
•
test
off
_:11371:101 ΣIx-method:Exponent 1.0 to 3.0 2.0
_:11371:102 ΣIx-method:Threshold 0 to 10000000 10000
Information List
No. Information Data Class
(Type) Type
ΣIx-method
_:11371:54 ΣIx-method:Inactive SPS O
_:11371:52 ΣIx-method:Behavior ENS O
_:11371:53 ΣIx-method:Health ENS O
_:11371:301 ΣIx-method:ΣIx A BCR O
_:11371:302 ΣIx-method:ΣIx B BCR O
_:11371:303 ΣIx-method:ΣIx C BCR O
_:11371:304 ΣIx-method:Warning ACT O
9.6.4.2
9.6.4.3
9.6.4.4
Measured Values, Energy Values, and Supervision of the Primary System
9.6 Circuit-Breaker Wear Monitoring
1026 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017