Monitoring Devices; System Behavior In Case Of Errors; Filter Monitoring; Speed Monitoring, Blower - TBH DF Serie Manual De Uso Y Mantenimiento Original

8. Monitoring Devices

8.1

System Behavior in Case of Errors

As standard, all TBH extraction and filter systems are configured such that in case of an
error:

The system is stopped (can be changed via customer-specific parameterization)

The display indicates the respective error: Filter error, speed error and temperature
error.

An acoustic warning in the form of a beep occurs.

The INSPIRE interface sets the potential-free signal 'group error'.

The INSPIRE control electronics stores the occurred error in the message memory.

Additionally, the TBH signal module can be used to visualize the system status.
8.2

Filter Monitoring

All TBH extraction and filter systems are equipped with a filter monitoring system. This
system operates on the principle of differential pressure monitoring. In this, the pressure
upstream and downstream of the filter elements is measured. The difference between these
two values provides the current filter differential pressure.
When air flows through a new filter element, it already generates a low differential pressure.
This initial differential pressure is characteristic of an extraction and filter system and is
determined, among other things, by the characteristic curve of the blower being used.
When the filters become saturated, their differential pressure increases and the extraction
capacity of the extraction and filter system decreases. With TBH extraction and filter
systems, the maximum permissible loss of extraction power caused by the saturated filters is
30%.
The current filter status is graphically processed by the TBH INSPIRE control electronics and
indicated on the system display. The system differentiates between the filter pre-warning
stage at 75% of the maximum filter saturation and the filter error at 100% of the maximum
filter saturation.
This does not apply for systems of the DT series: Here, the differential pressure is output by
an analog measuring instrument
8.3

Speed Monitoring, Blower

TBH extraction and filter systems (except BF9 and DT series) are equipped with blower
speed monitoring. The current fan speed is continuously determined via several Hall
sensors.
If the blower speed falls below a minimum value, for example due to an electronic or
mechanical defect, or overheating of the motor winding, the INSPIRE control electronics
registers this and triggers the speed error.
8.4

Temperature Monitoring, Control Electronics

The INSPIRE control electronics also have a temperature sensor which monitors the
temperature in the turbine housing and thus protects the system from damage caused by
overheating. If the parameterized maximum temperature is exceeded, the temperature error
is automatically set.
Monitoring Devices
85