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Speed Monitoring
Sensonics speed monitoring systems offer accurate detection of overspeed and zero speed events for the protection of critical rotating machines such as turbines, pumps, etc. The monitors are capable of working with a range of speed sensors and include fault detection circuitry to offer a high integrity speed monitoring solution.
In addition to providing shutdown through speed monitoring an important parameter of the system is the spurious trip performance. The 2 out of 3 voted configuration utilised in the Sensonics Overspeed Protection system virtually eliminates the spurious trip scenario in conjunction with a SIL-3 rating to IEC 61508.
Sentry Overview Brochure |
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Sentry API670 Monitoring and Protection System
The Sensonics API 670 compliant Sentry range of rack mounted equipment has been developed to provide a one-stop shop for all your measurement requirements. The Sentry 8608 Speed Monitor is an API670 compliant module which accepts either an eddy current probe or magnetic probe speed sensor input measured from a key / slot or toothed wheel (TTL also accepted) up to a frequency of 10 kHz.
The speed monitor can be operated in an overspeed monitor mode to trigger recording of the maximum speed and trip speed levels during an overspeed protection event or during the use of the speed monitor online testing facility. Additional alarms are also available to indicate the integrity of the speed sensor and to provide a zero speed alarm.
The Sentry monitoring system is particularly suitable for large turbine generator sets where the speed monitoring forms part of the essential Turbine Supervisory System.
Sentry Module Datasheets » |
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Aegis Overview Brochure |
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Aegis Monitoring and Protection System
The Aegis system offers similar measurement capabilities to Sentry but in a lower cost rack mounted package. The speed monitoring card forms an essential part of the Aegis range of measurement variants for the protection of critical rotating plant.
The system utilises a shared display located in the instrument rack with single channel cards for each of the required measurement channels. The Aegis monitoring system is suitable for a range of rotating machinery including turbines, motors and pumps where individual channel displays are not required (closed equipment cabinets, unmanned sites, etc). Other measurement modules include vibration, displacement, expansion, and temperature in addition to the speed monitoring option. This technology is also available as a single channel unit in a wall mounted enclosure for standalone applications.
Aegis Module Datasheets » |
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DN2608 Speed Monitor
The DN2608 is a DIN rail mountable single channel speed monitor offering dual level alarms (positive and negative going) in combination with 4-20mA outputs for PLC or DCS connection. The DN2608 is designed to work with a wide range of speed sensors to provide flexible speed monitoring and protection over a wide range of applications.
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