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Circuit Breakers

The 1140-G451-P7M1-1A (1140) is a type of circuit breaker that is designed to protect electrical circuits from overload, over current, and short circuit. The 1140 is used in many different applications, from commercial buildings and industrial facilities to residential homes and vehicles. It has two main parts: the circuit breakers’ contacts, which are housed in an insulated box, and the trip unit, which is connected to the contacts and detects when a fault (excessive current) occurs.

The 1140 features a number of different circuit parameters, such as B-curve, C-curve, and D-curve, meaning that it can be set up to detect different levels of fault current and trip accordingly. The 1140 also has a number of different installation configurations and can be used with a variety of system designs, including the four-wire connection. The 1140 is designed with a long-term reliable structure, and it is UL 489 listed and CSA certified.

The 1140’s working principle is based on the ability of the trip unit to detect a fault (overcurrent) and to open the circuit breaker’s contacts to prevent further damage from occurring. When an overcurrent occurs, the trip unit senses the excess current and immediately trips the contacts, breaking the circuit and preventing further damage. The trip unit also has the ability to reset the circuit breaker, which allows the current to be restored to normal levels.

The 1140 is most commonly used in commercial and industrial applications, as it provides excellent protection and reliability. It is often used in buildings, factories, warehouses, and other commercial and industrial facilities, where it can protect circuits and devices from short-circuits and system overloads. In addition, the 1140 can also be used in residential homes, vehicles, and other applications where circuit protection and reliability are important.

The 1140’s easy installation and adjustable circuit parameters make it suitable for a variety of applications, ensuring that it can be properly tailored to each individual project. As the 1140 is UL 489 listed and CSA certified, it is extremely reliable and provides an added level of safety and protection, while also offering efficient and cost-effective circuit protection.

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