Siemens SIPROTEC 7SJ61, Руководство пользователя, Страница: 231 / 454

Functions
2.17 Auxiliary Functions
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008 231
2.17.4.4 Information List
2.17.5 Min/Max Measurement Setup
Minimum and maximum values are calculated by the 7SJ61. Time and date of the last update of the values can
also be read out.
2.17.5.1 Description
Minimum and Maximum Values
The minimum and maximum values of the three phase currents
I
A
,
I
B
,
I
C
, the positive sequence components
I
1
and the thermal measured value of overload protection
Θ
/
Θ
Trip
are calculated as primary values including the
date and time they were last updated.
The minimum and maximum values of the long-term mean values listed in the previous section are also calcu-
lated.
The min/max values can be reset via binary inputs, via DIGSI or via the integrated control panel at any time. In
addition, the reset can also take place cyclically, beginning with a pre-selected point in time.
2.17.5.2 Setting Notes
Minimum and Maximum Values
The tracking of minimum and maximum values can be reset automatically at a programmable point in time. To
select this feature, address
8311 MinMax cycRESET
should be set to
YES
. The point in time when reset is to
take place (the minute of the day in which reset will take place) is set at address
8312 MiMa RESET TIME
.
The reset cycle in days is entered at address
8313 MiMa RESETCYCLE
, and the beginning date of the cyclical
process, from the time of the setting procedure (in days), is entered at address
8314 MinMaxRES.START
.
2.17.5.3 Settings
No. Information Type of In-
formation
Comments
833 I1 dmd= MV I1 (positive sequence) Demand
963 Ia dmd= MV I A demand
964 Ib dmd= MV I B demand
965 Ic dmd= MV I C demand
Addr. Parameter Setting Options Default Setting Comments
8311 MinMax cycRESET NO
YES YES Automatic Cyclic Reset Function
8312 MiMa RESET TIME 0 .. 1439 min 0 min MinMax Reset Timer
8313 MiMa RESETCYCLE 1 .. 365 Days 7 Days MinMax Reset Cycle Period
8314 MinMaxRES.START 1 .. 365 Days 1 Days MinMax Start Reset Cycle in