What voltage is dangerous for equipment, motors and circuits?
Good day! What is really dangerous voltage at the upper setting at which a fire occurs:
- windings of engines of refrigeration compressor units;
- electronic microcircuits (boards) of audio, video and computer equipment;
- household appliances (heaters, heating elements).
What is the upper voltage limit that will not cause fire and damage to the above equipment?
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On each appliance in the technical specifications, the permissible range of operating voltage is written - that is, the voltage value at which this appliance should work normally for a long time. This range for each specific appliance may vary.
In the case of connecting the appliance to the network, where the voltage is higher than the permissible value, the probability of the failure of the appliance increases and the higher the voltage, the greater the likelihood of the failure of the appliance. With large power surges, the appliance may immediately fail. At the same time, it is impossible to say for sure at what specific voltage a particular appliance will immediately fail.
If, for example, we take the situation when a zero break occurs in the mains supply, in this case a voltage above 300 V may appear in the outlet. With this voltage, most of the electrical appliances that are currently operating will fail immediately.
As for the fire, then, as such, the fire may not be. The compressor will fail due to an inter-turn short circuit - this will not be visible visually, just the compressor will stop working due to a break in the winding. The heaters also simply burn out - there will be a break in the heating element, this will not be visible visually.
In electronic technology, the power supply will first fail, which converts the mains voltage to the required value for powering the electronic components. It is possible that electronic components of equipment may suffer. In this case, the appliance may fail immediately without visible signs, or there may be a fusion or fire of elements in the power supply circuit.