The temperature control equipment of the electric heater must ensure a certain working temperature

Aug 25,2022

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During the maintenance or shutdown of the electric heater, the main power switch should be disconnected, and then relevant tests and disassembly inspections should be carried out. After the unit is shut down, the use of the temperature control equipment of the electric heater should be detected immediately to ensure that the problem is found early and there is enough time to deal with it. If the insulation resistance is lower than 1MΩ, the cable head should be removed, and the insulation resistance of the cable and the electric heater should be measured separately to distinguish whether the problem is the cable or the electric heater. If the three-phase DC resistance is found to be unbalanced, the cable and electric heater should also be measured separately to determine the specific location and temperature.

Each group of three-phase DC resistance and each phase insulation resistance, and make a record. At the same time, do the core pulling inspection of the electric heater, remove the dust in the heater, clean the scale of the electric heater, check the appearance and tightening of the electric heater, tighten the connection wires in the control cabinet, check and verify the thermometer and Whether the temperature controller is operating normally. Before starting the unit, the insulation resistance of the heater should also be measured again. If the insulation resistance of the individual group is found to be low, it cannot be sent to prevent damage to the electric heater or cable.

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Aug 25,2022

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