RE-WIRING MOTOR OPERATED VALVE DESUPERHEATER DI UNIT 1.1 PLTGU UP GRESIK
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Adrian, Wulan Rizkybrilianty
Pasra, Nurmiati
Pasra, Nurmiati
Subject
Teknik Elektro
Datestamp
2020-01-16 12:01:58
Abstract :
MOV Desuperheater is a motor equipment that serves to drive the valve that will operate the spray on Desuperheater. The desuperheater will operate when the temperature on the superheater line is above 487 ° C. Desuperheater lowers the high temperature by spraying water from HP Feed Water into the superheater line. In the MOV Desuperheater there is a series of electrical controls described in a wiring diagram. Wiring diagram itself is a picture of an electrical circuit that provides detailed information about the circuit symbol to the circuit connection with other components. On the Overhaul Turbine Inspection in PLTGU Unit 1.1 UP Gresik there is WO MOV Desuperheater replacement. In this MOV Desuperheater replacement there is a different wiring diagram in the new MOV Desuperheater with the system used on the unit, therefore it is necessary to re-wiring the new MOV Desuperheater wiring diagram to be used and in accordance with the system used. After the re-wiring, the torque switch needs to be positioned at position 3 on the bolt, so no leakage occurs in the fluid delivered by MOV. The switch limit setting is done to ensure that when the valve is open and the open limit switch contact is not pressed the adjusting bolt needs to be tightened . And when the valve is closed but the closed limit switch contact has not been pressed then the adjusting bolt should be loosened.
MOV Desuperheater is a motor equipment that serves to drive the valve that will operate the spray on Desuperheater. The desuperheater will operate when the temperature on the superheater line is above 487 ° C. Desuperheater lowers the high temperature by spraying water from HP Feed Water into the superheater line. In the MOV Desuperheater there is a series of electrical controls described in a wiring diagram. Wiring diagram itself is a picture of an electrical circuit that provides detailed information about the circuit symbol to the circuit connection with other components. On the Overhaul Turbine Inspection in PLTGU Unit 1.1 UP Gresik there is WO MOV Desuperheater replacement. In this MOV Desuperheater replacement there is a different wiring diagram in the new MOV Desuperheater with the system used on the unit, therefore it is necessary to re-wiring the new MOV Desuperheater wiring diagram to be used and in accordance with the system used. After the re-wiring, the torque switch needs to be positioned at position 3 on the bolt, so no leakage occurs in the fluid delivered by MOV. The switch limit setting is done to ensure that when the valve is open and the open limit switch contact is not pressed the adjusting bolt needs to be tightened . And when the valve is closed but the closed limit switch contact has not been pressed then the adjusting bolt should be loosened.
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