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http://dx.doi.org/10.7471/ikeee.2019.23.1.107

Safety Schematic Diagram and Sequence of Heater in FPD Wet Equipment  

Yoo, Heung-Ryol (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Education)
Son, Yung-Deug (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Education)
Publication Information
Journal of IKEEE / v.23, no.1, 2019 , pp. 107-111 More about this Journal
Abstract
In FPD WET equipment, heaters are used a lot. There are many electric accidents caused by short circuit and overheating due to the use of heater, so it is necessary to have a safe electric system and interlock. Therefore, in this paper, we propose an electrical schematic and interlock for FPD WET equipment. In this paper, a hardware interlock such as a level sensor, an overheat protector, and an SSR heater sink is inserted, and the electric system is composed of ELB - MC - SSR - EOCR - heater. When the interlock occurs, the magnetic contactor (MC) is turned off and the power of the heater is cut off.EOCR, an electric overcurrent protection device, has an interlock to shut down the MC when there is an abnormality in the heater while checking the overcurrent, undercurrent and disconnection. These circuit configurations and interlocks are likely to be useful not only for WET equipment but also for any equipment in which the heater is placed.
Keywords
EOCR; FPD; HEATER; INTERLOCK; LEVEL SENSOR; MC;
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