What is over voltage and under voltage protection?
Over voltages are the voltages that exceed the normal or rated values which cause insulation damage to electrical appliances leading to short circuits. Similarly, under-voltage causes overloading of the equipment leading to lamp flickers and inefficient performance of the equipment.
What is over voltage protection circuit?
Over voltage protection is a power supply feature which shuts down the supply, or clamps the output, when the voltage exceeds a preset level. Most power supplies use an over-voltage protection circuit to prevent damage to the electronic components.
What device is commonly used to protect equipment from over and under voltage problems?
Fuses, circuit breakers, temperature sensors and current limiters are commonly used protection mechanisms to control the risks of over current. Over current protection also includes the protection against over loads and this is most widely used protection.
What causes overvoltage and undervoltage?
Undervoltage conditions are usually be caused by undersized or overloaded utility and facility transformers. During peak demand periods and/or when the utility is experiencing problems, the demand for power exceeds the capability of the transformer and as a result the voltage drops.
How are under voltage and overvoltage protection circuits connected?
And finally, the relay is getting operated to isolate the loads from the main supply. These overvoltage and under voltage conditions status are also displayed as LED indication which are connected to respective timers as shown in the figure. These are the two different overvoltage and under-voltage protection circuits.
What is the difference between overvoltage and overcurrent?
Overvoltage is the condition where the operating or supply voltage is higher than the rated voltage of the system specified by the manufacturer. As the name suggests, overvoltage is the higher supply voltage to a device than its nominal rated voltage.
When to cut off power supply for overvoltage?
An overvoltage protection circuit will operate when the supply voltage increases up to 110% to 130% above the rated voltage of a device. This way, it will cut off the power supply to protect the device from overvoltage which may cause to damage the connected device.
When is voltage higher than permissible is known as overvoltage?
In short, voltage higher than the permissible voltage is known as overvoltage. Generally, when the supply voltage increases up to 1.1 (which is 110%) of the rated voltage of a device is known the overvoltage unless specified by the manufactures. For instance, if the rated voltage printed on the nameplate data rating of a machine is 230V AC ±10%.
