D.A.D. DTS Temperature Sensor

Distributed Optical Fibre Temperature Sensing system (DTS) is based on Raman Scattering Theory. Raman scattering is related to the thermal vibration and sensitive to temperature, so it can be used for temperature testing. Light scattering, also known as Raman scattering, occurs in the optical fibre. Unlike incident light, this scattered light undergoes a spectral shift by an amount equivalent to the resonance frequency of the lattice oscillation. The light scattered back from the fibre optic therefore contains three different spectral shares: the Rayleigh scattering, the Stokes line components and the Anti-Stokes line components. The Stokes line components and the Anti-Stokes line components are dependent on temperature. Since the Raman scattering light is sensitive to temperature, it can measure corresponding temperature distribution along the fibre.

Specifications:

Measuring Distance: 1-16KM
Temperature Measuring Range: 40°C – 65°C (depending on fibre type)
Temperature Measuring Accuracy: ±5°C
Response Time: 0.6s/KM
Spatial Resolution: 0.8m
Position Accuracy: 0.8m
Channel Number: 1 / 2 / 4 / 8 / 16 Channels
Communication Interface: 100M
Alarm Output: 8 / 16
Relay; Normally Open / Close valve
Input Power: AC220V (50Hz) / DC12-36V
Power Consumption: Max 25W
Weight: 8.7KG
Dimension: Rack Mounted : 1U / H44.5 x W440 x D266 mm Rack Mounted : 1U / H89 x W440 x D266 mm
Installation Standard: 19’, 1U/2U case

Application examples:

CABLE TUNNEL FIRE MONITORING
By laying an optical fiber into the cable tunnel, the distributed optical fiber temperature monitoring system can implement the temperature monitoring on several cables and fire warning of the whole cable tunnel.

HIGH VOLTAGE POWER CABLE LOAD SAFETY MONITORING
After getting the data of the temperature on the surface of the cable, the system can further calculate dynamic load flow and simulate all kinds of running state by combining the real-time current to calculate the cable core temperature. By monitoring the temperature of the cable, we can find the overheat or abnormal point within the total cable length range.

TEMPERATURE MONITORING OF TRANSFORMER WINDING
By using the distributed optical fiber temperature sensing system, the temperature of the transformer winding can be measured by the fiber twined around the transformer winding. And by the continuous monitoring for the transformer winding, it is able to master the working condition of the transformer and know the defective and degradation situation of the equipment.

HIGH VOLTAGE SWITCH CABINET TEMPERATURE MONITORING
The temperature of a totally enclosed high voltage switch cabinet can be monitored online and timely so that the hidden trouble and danger can be found and eliminated in advance, which is of great significance in ensuring safe and reliable power supply. Using the distributed optical fiber temperature sensing system to monitor the temperature of a high voltage switch cabinet is a new solution on temperature monitoring. It not only avoids the interference of electromagnetic fields, but is also resistant to high temperature and radiation, and effectively improves the reliability of high voltage switch cabinets.