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ARTICLE

Overspeed protection

05 May 2015

Sentry G3 is Sensonics’ latest generation of protection equipment for overspeed protection applications. The four channel G3 module has been specifically designed with an independent digital signal processor (DSP) for each channel of measurement providing ease of scalability in combination with high integrity. 

The DSP can be software loaded with the specific measurement algorithm which not only controls the sensor selection, but also the protection relay status and analogue output levels. This provides complete hardware autonomy from sensor through to the protection relay combined with a high channel density (24 channels in a 3U format). 

It is typical for overspeed protection to utilise a two out of three (2oo3) voted channel arrangement to meet with stringent spurious trip requirements. This is implemented in G3 by utilising 3 modules, each with a single DSP channel to maintain channel hardware segregation, and configured with the overspeed algorithm. G3 offers the advantage that the remaining module channels can be utilised for other machine measurements such as bearing vibration, shaft position or temperature.  Alternatively the DSP cards can be removed for a more cost effective solution


 
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