Operating range monitoring
- Heating, ventilation and air conditioning
- Multiple fans driven by multiple motors are connected to a frequency converter. The internal monitoring systems in the frequency converter cannot recognise the failure of an individual fan.
- The permissible operating range of the electric motor for each fan is monitored with a cos phi monitoring unit using the “under” function. As soon as the cos phi leaves the acceptable range, for example because of a load reduction due to a defective V-belt or a dirty filter, the relay output is tripped, and the higher-level control system can recognise the fault.
- - Fast and low-cost monitoring, simple retrofit
- No sensor needed in the air channel – relevant for dust, heat and aggressive exhaust gases
- Lower maintenance requirements than for direct measurement in the air channel
- Measuring relay suitable for use with frequency converters
This might be of interest for you
No entries found.
Continuous operation detection
Preventing the destruction of a compressor due to continuous operation after an air hose becomes defective.
Sty ventilation system monitoring
The ventilation of a pigsty must be ensured. If the system fails, the animals could die.
When the lights fail in public buildings (such as schools) because of undervoltage, the emergency lighting systems must be activated in publicly accessible…
Sorting system lighting
Monitoring the lights in quartz and stone sorting systems for failure/faults.
Burner process control
A temperature limiter is installed in the process controller of a burner. When it is triggered, a fault message should be sent and maintained after the power is…
Monitoring of smoke extraction fans
Function monitors should be installed for smoke extraction fans that must run without motor protection, and possibly until they fail, in the event of a fire.