A voltage protection relay helps protect home appliances from sudden voltage rise, drop and spikes. It disconnects the circuit when voltage moves outside safe limits and reconnects after a delay.
If lights flicker, devices restart, adapters overheat or voltage changes during peak hours, the wiring and electrical panel should be checked.
An electrician measures voltage, checks breakers, contacts, incoming cable and load groups, then selects and installs the relay safely in the electrical panel.