Fire protection measures requisite
High-voltage laboratories and EMV test laboratories are frequently to be found in research institutions, universities and test institutes. Densely packed with metering equipment, they represent a high concentration of value, while some experiments even continue running during the night when nobody is present. Highfrequency absorbent materials, printer paper and cables represent possible fire hazards, smokers requisites thrown away carelessly (despite a smoking ban) and technical faults in equipment are possible sources of ignition. Appropriate fire protection measures have to be taken.
Interfering electrical fields
Any conventional, point detectors have their function interfered with by the electrical, magnetic and electromagnetic fields generated during experiments. On the other hand, the highly sensitive measurements themselves can be interfered with by the data transmissions by the fire detectors. Indeed, even other external interfering signals will be input into the measuring room through the antenna effect of the alarm wiring.
With the ASD aspiration smoke detection system, the
place of smoke detection is separated physically from the place of evaluation:
the evaluation unit with the sensitive detector is located outside of
the test room in a place protected from the
electromagnetic fields. Air samples are transported through the suction
tube network to the evaluation unit. In this manner, not only are the
disadvantages of the point detectors avoided, but further advantages of
the aspiration smoke detection system become apparent.
Advantages of the aspiration smoke detection system
– False alarms cannot be set off by high fields
as the evaluation unit is located outside of the experimental area.
– High sensitivity depending on the ASD version with limit value
alarm, 2-step or 10-step, and the possibility of taking the appropriate
measures in the event of even the most minute amounts of smoke.
– Maintenance works on the ASD aspiration smoke detection system
are implemented outside of the sensitive area and do not hinder measurements.
It is not necessary to switch off power in the high voltage section.
Typical arrangement of an EMV measuring room
Evaluation unit is outside the field area
References (extract)
EMV test rooms:
– Daimler Benz, Sindelfingen/D
– BMW, Munich/D
– MBB, Ottobrunn/D
– German armed forces, Greding/D
– IABG, Ottobrunn/D
– Fiat, Turin and Naples/I
High-voltage laboratories:
– KTH, Stockholm/S
– Muttenz School of Engineering, Basle/CH
Similar fields:
– CERN, Laboratory for nuclear research, Geneva/CH (over 300 ASD!)
Exemplos de aplicações para o sistema de aspiração de fumaça ASD:
Installation monitoring in EDP systems and control cabinets
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