Surge Protection (SPD)
Introduction
A surge protector, also known as SPD, DPS, electrical protectors or voltage suppressor, is a device designed to protect electrical devices from power surges") by managing or managing the electrical power of an electronic device connected to it. A surge protector attempts to regulate the voltage "Voltage (electricity)") that is applied to an electrical device by blocking or sending to ground "Ground (electricity)") voltages greater than a safe threshold.
Types of protectors
Permanent surge protectors
Permanent overvoltages are voltage increases greater than 10% of the nominal voltage and an indeterminate duration. Powering equipment with a voltage higher than that for which it has been designed can generate:
Protection against permanent overvoltages requires a different system than transient overvoltages. Instead of shunting to ground to avoid excess voltage, it is necessary to disconnect the installation from the electrical network to prevent overvoltage from reaching the equipment. The use of protectors is essential in areas where there are voltage value fluctuations of the network.
Permanent surge protectors with automatic reconnection
Like permanent surge protectors, these devices are capable of disconnecting the installation from the electrical network when the voltage exceeds a set value, but in turn the device automatically reconnects when the voltage is again established below that threshold and remains for a specific time. Thanks to this function we avoid leaving the receiving installation without supply indefinitely, since the permanent surge protectors trip the associated circuit breaker (IGA). In this way we will not leave the most susceptible installations without power, such as cold storage rooms, telecommunications stations, public lighting, advertising screens, second homes, electric vehicle charging points, etc. In all these cases and due to the new smart meters installed by electricity supply companies, the permanent surge protective equipment with automatic reconnection must be capable of offering an infinite impedance to reset the supply cut-off function when the contracted power (ICP) is exceeded.