Diagnostic and monitoring system MOSAD®-IRIS
Long term experience shows that the brush gear is the most vulnerable part of the generator. Continuous montoring of the brush gear enables to prevent uneven brush load (overloaded or poorly conducting brushes) and thus reduce the slip rings wear or in extreme cases prevent the destruction of the brush gear.
Permanent control over the brush gear device provided by remote or local control and the system of alarms enable targeted maintenance interventions and significantly minimizes their frequency.
The device measures the DC current flowing through each carbon brush. The current sensor is based on indirect compensation method and includes Hall effect sensor, compensation winding circuit and related electronics.
The IRIS transducers can be adapted to various types of brush gears according to generator manufacturer´s requirements. Currently two types of transducers exist: IRIS 4.1 ( a compact block of 4 transducers) and IRIS 1.1 (with bracket holding for 1 individual brush).
MOSAD®-IRIS is fully autonomous, yet it is advisable to integrate it in an existing information system.
Processing and display unit features
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Advantages and use of the system
To increase operational safety of generators with hydrogen cooling, the transducer power supply automatically switches off, if the generator is disconnected from the grid. |