Precautions for using reel cable
Why completely loosen the cable under high load?
The use of electrical equipment also generates heat where current flows. If more electricity is used by multiple users, more heat is also generated. If the cable is wound like the cable of the cable coil, the heat naturally has a hard time dissipating. To avoid cable overheating, the cable should always be fully unrolled from the reel.
A cable reel device, such as a cable reel or cable box, becomes very hot inside the coiled cable. Therefore, the temperature switch, also known as overheating protection, is mandatory. Without this mechanism and overheating protection, the cable insulation could melt and cause damage - or in the worst case, a fire in the cable reel.
How strong is the cable reel when rolled up?
For example, a landscaping trimmer is about 500 to 700 watts. This means that if you are molding the hedge and only insert the hedge trimmer into the cable reel or cable box, even if the cable is not fully unfolded, you are not taking any risk because the output of the hedge trimmer is less than 1,000 watts.
Electric lawnmowers, on the other hand, are already more than 1,500 watts of power and so can only be used with fully deployed cables.
When does the overheat protection trip and how does it work?
Overheating protection is triggered if excessive temperature occurs in the drum core. At approximately temperature. The current at 65°C is interrupted. This high temperature occurs if the cable is not fully deployed and if heat is generated due to excessive current flowing through the connected load. This is also called the coil effect.
It should be noted, however, that overheating can also be caused by other heat sources, such as solar radiation or machines in enclosed rooms. Thus, the heat generated during use is added to the ambient temperature.
Overheating protection trip procedure
If the overheat protection switch (bimetal sheet) interrupts the current, disconnect the power plug and unplug all loads. Fully deploy the cable and allow the cable deployer to cool. After a few minutes, you can briefly press the button on the socket board and reinsert the power plug, restoring the current.
If this is not the case after a long period of time, the switch may become damaged due to overload and must be replaced. Always fully deploy to avoid triggering overheating protection for easier use of the device.