Power protection devices are integral in ensuring the safety and durability of equipment from power failure and surge. These devices act like an insurance, providing “cover” for sensitive equipment and guarantee that the life of these electronics is prolonged.
If the equipment is unprotected, it can be badly damaged in case of power failure. For example, PCs can lose important data if there’s loss of power. Computers can also fry their motherboards if it experiences sudden power surge without protection.
Power protection devices reduce plug inconveniences, provide power backup and alternative power source, and distribute power properly so they can protect sensitive parts.
Line protection devices also provide protection like power protection devices. Their focus, however, is on overhead lines, which are susceptible to faults and other similar problems. When these lines are hit by lightning, cars, trees, and wind, they become vulnerable to short circuit and over-current flow.
Power Protection Devices Components
There are five basic components of power protection devices: circuit breakers, voltage and current transformers, communication channels, batteries, and protective relays.
- Circuit breakers are responsible for opening and closing the system according to autorecloser and relay commands.
- Voltage and current transformers are essential for controlling an electrical power system’s voltages and currents, ensuring that they stay at safe levels.
- Communication channels are intended for voltage and current analysis.
- Batteries are vital especially when the system power is disconnected. They provide the needed power.
- Protective relays determine faults. They are also responsible for initiating disconnection orders.
Power & Line Protection Devices Examples
Here are some examples of power and line protection devices:
- Generator sets
- Power supplies and PSUs
- Solar panels
- DC / AC inverters
- Surge protectors
- Line conditioners
- Line reactors
- Automatic voltage regulators (AVRs)