imc: Temperature measurements in HV environments
Users who perform measurements in high-voltage environments or in the field of E-mobility especially benefit from this technology. Thanks to the optical measuring principle it is independent of any electrostatic and electromagnetic influences. Thus all such EMI/ESD related concerns with errors, signal artifacts and even damage, that classical measurement technology used to be plagued with in HV contexts, can now be a thing of the past. The topic of personal safety, which prescribes comprehensive protective measures when working on voltages of more than 50 V, is also clearly reduced: the fiber-optic based sensors have no electrical conductivity whatsoever. This means that there is no need for special safety equipment or particular training of the operating personnel. Elaborate and expensive high-voltage cable insulation is unnecessary.
The particularly thin FBG temperature sensors with diameters down to 0.5 mm make installation easier and enable completely new applications. They can, for example, be directly integrated into the windings of an electric motor without significantly influencing its properties. Larger conventional sensors would alter the motors magnetic fields and potentially introduce irregularities or even mechanical noise. The fast response of the fiber-optic sensor can then precisely detect and record the dynamic temperature changes in the windings under load. This is a task that was previously almost impossible to solve with conventional sensor technology (PT100 or thermocouple).
Kai Gilbert, Managing Director of imc Test & Measurement GmbH, sees further advantages in the simple handling: “Fiber-optic measurement technology has been around for a long time – however, up until now it has hardly been used in the area of testing. This was mainly due to the complicated handling and the lack of integration possibilities. We have now solved this problem with the FBG measurement module. It can be applied immediately with the supplied sensors – just plug it in, enter the characteristics and you’re done. The data can be transferred via the CAN interface either directly to a data logger, an application system or to an automation system.”
And Christian Walther, Key Account Manager at imc Test & Measurement GmbH, adds: “When it comes to fiber-optic measurement technology, many people are expecting excessively high channel prices. With the imc CANSAS-FBG-T8 however, it hardly makes any difference in terms of costs for our customers, whether they implement their HV instrumentation with classic or fiber-optic technology – but it certainly does with regard to the ease of use and the quality of results!”
Source: imc Test & Measurement GmbH