VIBRATION MONITORING OF FANS INSTALLED IN ROAD TUNNELS CEMB SPA Via Risorgimento, 9 Mandello del Lario (Lc), Italy stm@cemb.com www.cemb.
CEMB SPA – Mandello del Lario INSTRUMENT FOR MONITORING VIBRATIONS OF FANS INSTALLED IN ROAD TUNNELS PURPOSE OF THE INSTRUMENT The instrument measures and monitors the vibrations of each fan installed. It allows checking for correct machine operation over a period of time thus preventing catastrophic failures.
CEMB SPA – Mandello del Lario 1.2.4. Resistance to environmental agents. The transducer should be tightly sealed and insensitive to ambient humidity (max. 25%) and resistance to contamination by dusts and lubricating oils with a degree of protection IP 65 (CEI standards) 1.2.5. Cables and connectors. The transducers are complete with male-female connection to MIL standards, able to withstand the mechanical and thermal stresses described in points 1.2.3 and 1.2.4. 1.2.6. Mounting.
CEMB SPA – Mandello del Lario 1.3.5. Analog output. Each vibration channel sends an output signal 4 to 20 mA proportional to the RMS value of the vibration speed measured. 1.3.6. Environmental conditions. The instruments operate correctly within a temperature range from –10°C to + 50°C. 1.3.7. Power supply. Instrument power supply is 220 Vac – 50 Hz 1.3.8. Composition of the instruments. Each instrument is mounted in a 19” rack enclosure able to process at least 16 measuring channels.
CEMB SPA – Mandello del Lario POWER SUPPLY MODULE PW T1-C FUNCTION Power supply module PW T1-C is able to supply stabilized voltage up to 8 processing modules T1-C. The power supply is mounted in a wall-mounted unit. The instrument can be mounted in suitable enclosure with degree of protection IP54 for applications in protected environment. TECHNICAL CHARACTERISTICS External connections : terminal board WEIDMULLER TOP 1,5 GS Supply voltage : 100 – 220 V 50 Hz ± 10% Max.
CEMB SPA – Mandello del Lario 4 HOLES dia. 6.
CEMB SPA – Mandello del Lario PROCESSING MODULE T1-C FUNCTION The T1-C processing module is able to process the signals coming from two vibration transducers type T1-40 and to supply, for each signal, an analog output and an alarm contact. The module can supply the analog outputs proportional to the axial position or speed of vibration. Such module is extremely compact in design while it allows simple and modular monitoring of the vibrations.
CEMB SPA – Mandello del Lario TECHNICAL CHARACTERISTICS External connections : terminal board WEIDMULLER TOP 1,5 GS Supply voltage : + 15 V / - 15 V Max. current drawn : + 15 V = 120 A - 15 V = 16 A: N° of channels processed :2 Unit of measurement of vibration : 0 to 100 µm, 0 to 300 µm 0 to 10 mm/sec 0 to 30 mm/sec Output signals (terminals OUT1 and OUT2) : 4 TO 20 mA proportional to the input vibration Alarm contacts (terminals ALARM 1 – ALARM 2) : 1 SPDT for each channel Max.
CEMB SPA – Mandello del Lario
CEMB SPA – Mandello del Lario ASTA07120
