Building­ ventilation­ systems

Product category
cos phi
Data Sheets

Functional monitoring of V-belt-driven fans in technical building systems.

Solution description

The breakage of a fan V-belt should be detected to recognise system failures and to prevent the fan motor from running without a load. The breakage of a V-belt causes the drive motor to run without load, and the cos phi falls below the configured threshold. The cos phi monitor signals the system fault through the LED display that is controlled by the relay contact.

Benefit/added value

– Detection of system downtime without sensors
– Fan protection by preventing continuous operation
– Reduction of maintenance and repair costs

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