Overstroomrelais

An overstroomrelais, also known as an overcurrent relay, is a safety device used in electrical systems to protect against excessive current. It operates by detecting when the current flowing through a circuit exceeds a predetermined safe level. When this threshold is crossed, the relay triggers an action, typically to interrupt the flow of electricity. This interruption is usually achieved by opening a switch or signaling a circuit breaker to trip.

The primary function of an overstroomrelais is to prevent damage to electrical equipment, such as motors, transformers, and wiring, which can be caused by short circuits or overloads. Overloads occur when a device draws more current than it is designed to handle, often due to an increased load or a fault within the device itself. Short circuits, on the other hand, are a direct low-resistance path between conductors, leading to a sudden and massive surge of current.

Overstroomrelais are essential components in ensuring the reliability and safety of electrical installations in both industrial and domestic settings. They come in various types, including thermal, magnetic, and electronic relays, each with different characteristics for detecting overcurrent conditions. The selection of a specific type and its settings depends on the protected equipment, the expected fault currents, and the desired response time. By quickly isolating faulty sections of a circuit, overstroomrelais help to minimize downtime and prevent dangerous situations like fires.