Single-head electric heating tube with shell

1. Overview of the single-head electric heating tube in a housing
The structure of a single-head electric heating tube in a housing: a single wire is drawn from one end of the electric heating tube, and the other end is connected to the component. It is also divided into soft wire outlet, screw rod outlet, and screw hole outlet (directly screw into the terminal with screws). Voltage: -Normal recommended specifications: ︿︿.
2. Calculation of the resistance of a single-head electric heating tube connected to a shell
Example: 'Electric heating tube
Watts (power) volts (voltage) Find: (current)
//.Ampere
Ohm's law: R (resistance)
R//.3.Europe
3. Common tests and inspections of electric heating tubes
, resistance inspection, cold voltage withstand inspection, Cold insulation inspection.
, power inspection, thermal insulation inspection, thermal withstand voltage inspection, leakage current inspection.
Tide test, salt spray test, life test and other mechanical tests.
4. Performance requirements of single-head electric heating tubes with shell
The temperature rise time under the test voltage, the time for the component to rise from the ambient temperature to the test temperature should not be greater than the rated power deviation. Under the condition of sufficient heating, the component The deviation of the rated power should not exceed the following specified range
The component with the ability to withstand power on and off should be able to undergo multiple power on and off tests under the specified test conditions without being damaged
The overload capability component is within Under the specified test conditions and input power, it should withstand 3 cyclic overload tests without damage
. The heat-resistant components should withstand 3 cyclic heat resistance tests under the specified test conditions and test voltage without damage. Damage
5. Precautions for the use of single-head electric heating tubes with shells
The components should be stored in a dry place. If the insulation resistance drops below megohms due to long-term storage, it can be placed in an oven at about ℃ Drying for several hours (or passing low voltage through the component for several hours) will restore the insulation resistance.
When it is found that there is carbon on the surface of the tube, it must be removed before use to avoid reducing efficiency or even burning out the components.
When melting solid oils such as asphalt and paraffin, the voltage should be reduced and then raised to the rated voltage after melting. To prevent the concentration of power from reducing the service life of components.