219-2-1REC5-38756-40

Circuit Breakers

Circuit breakers, designated by the code 219-2-1REC5-38756-40, are electrical protection devices used to detect dangerous levels of current and protect wires and other components from damage. Circuit breakers consist of two parts, the trip unit that senses current levels and stops the current, and the contacts that open to cut off the current when a fault is detected. When a fault is detected, the contacts open and the trip unit sends a signal that shuts off the power supply, preventing further damage from short circuits or overloads. Circuit breakers can be reset manually or automatically, depending on the type of fault detected.

Application Field

Circuit breakers 219-2-1REC5-38756-40 are mainly used to protect household wiring and small electrical appliances from overloading, short circuits, or other electrical faults. Some of these circuit breakers are designed to perform specific functions, such as interrupting high-power circuits, stopping motors or controlling air-conditioning systems in homes or commercial buildings. They are also used in industrial environments for protection against electrical overloads or short circuits on high-voltage equipment. For example, they are used on machinery and systems that require frequent and reliable electrical protection, such as those in motor control centers or switchgear.

Working Principle

Circuit breakers 219-2-1REC5-38756-40 work by sensing a dangerous level of current flowing through the wires. When this is detected, the trip unit sends a signal to the contacts, which open to break the current and cut off the power supply. The contacts are typically made from materials with high electrical resistance, such as copper, aluminum, or bronze. These are sandwiched between a pair of permanent magnets that are energized when a fault is detected, creating a powerful magnetic field that opens the contacts. This causes an interruption of electric current that can prevent further damage to the electrical circuit, or stop hazardous electric arcs.

When a fault occurs and the circuit breaker trips, the contacts become open and need to be reset to restore the power. This can be done manually, for example by pressing a switch or turning a dial, or automatically using a reset device that detects when the fault has been cleared and the current is back to normal levels.

Circuit breakers 219-2-1REC5-38756-40 are essential for the safe and reliable operation of electrical circuits. They are designed to protect against dangerous currents and, when properly installed and maintained, offer protection from overloads and short circuits that can cause severe damage to electrical systems.