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The operation of the CB takes place by means of a modern magnetic actuator, which is driven by an electronic
MABS control card. The pulsed high-current energy for “Open” and “Close” operations (including a complete O-
CO sequence) is supplied by a capacitor bank. As a result, the auxiliary power supply of the installation is not
burdened by peak currents. Each actuator is equipped with two position sensors giving feedback on the state of
the pole. The MABS card analyses and indicates the state and consistency between expected sensor information
and given operating orders. The MABS card repeats this indication through auxilliary relays so that it is available
for external use.
3.1.1. MABS Control Card
Fig. 4
Schematic arrangement
Drive/Controller (two-pole apparatus)
The apparatus can be controlled by local push-buttons or remote control signals. The MABS card permanently
monitors itself, the supply voltage, the magnetic actuator, the position sensors, the capacitor charge and the logic
of the breaker position against the switching instructions. Malfunctions are detected and signalled automatically.
An error-free state is indicated with the “
READY
“ signal. A set of dip switches and jumpers allows configuration
of the functionality, according to customer requests. These settings are factory set and not to be changed at a
later date without the agreement of ABB- Sécheron.
Main features in detail:
•
High-power drive for magnetic actuator
•
Capacitive energy storage (capacitor bank)
•
Position sensors
•
Push button panel
•
7 binary inputs with universal voltage range
•
7 binary outputs with universal voltage range
•
LOCAL, REMOTE, GLOBAL operating modes (explanations in later chapters)
•
Interlock functions (blocked in open)
•
Under voltage aux. power supply detection
•
System monitoring
•
Power supply with two universal voltage ranges in AC/DC (depending on card type)
•
Low stand-by power and limited charging power consumption
•
Autonomy for apparatus operation in case of aux. power supply breakdown: T=1.5 to 2 min
Add-On card
Summary of Contents for FSK II S +
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