Siemens siprotec SJ62 User Manual page 34

RTD-Boxes
Phase Rotation
Circuit-Breaker
Maintenance
User Defined Func-
tions
Breaker Control
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
• Detection of any ambient temperatures or coolant temperatures by means of RTD-
Boxes and external temperature sensors.
• Selectable ABC or ACB by setting (static) or binary input (dynamic).
• Statistical methods to help adjust maintenance intervals for CB contacts according
to their actual wear;
• Several autonomous subfunctions are imlemented (ΣI procedure, ΣI
and 2P procedure); 7SJ64 also features the I
• Acquisition and conditioning of measured values for all subfunctions operates
phase-selective using one procedure-specific threshold per subfunction.
• Internal and external signals can be logically combined to establish user-defined
logic functions;
• All common Boolean operations are available for programming (AND, OR, NOT, Ex-
clusive OR, etc.);
• Time delays and limit value interrogation;
• Processing of measured values, including zero suppression, adding a knee curve
for a transducer input, and live-zero monitoring;
• CFC debugging via browser connection (7SJ64 only).
• Circuit breakers can be opened and closed via specific process control keys
(models with graphic displays only), the programmable function keys on the front
panel, via the system interface (e.g. by or SCADA), or via the front PC interface
using a personal computer with DIGSI);
• Circuit breakers are monitored via the breaker auxiliary contacts;
• Plausibility monitoring of the circuit breaker position and check of interlocking con-
ditions.
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1.3 Characteristics
2
t procedure);
x
procedure
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