1 Introduction
12
7UM62 Manual
C53000-G1176-C149-3
Breaker Control
•
Circuit breakers can be opened and closed via the programmable function keys on
the front panel, through the SCADA, or through the front operator interface using a
personal computer with DIGSI
®
4);
•
Circuit breakers are monitored via the breaker auxiliary contacts;
•
Plausibility monitoring of the circuit breaker position and check of interlocking
conditions.
Measuring
Transducers
•
If the 3 measuring transducers provided in the unit are not needed by the protection
functions, they can be used to connect any type of analog signals (
±
10 V,
±
20 mA);
•
Threshold processing and logical linking of measurement signals possible.
Monitoring
Functions
•
Availability of the 7UM62 is greatly increased because of self-monitoring of the
internal measurement circuits, power supply, hardware, and software;
•
Current transformer and voltage transformer secondary circuits are monitored
using summation and symmetry check techniques;
•
Trip circuit monitoring;
•
Phase Rotation.
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