IELHK111-30299-278-V Circuit Protection

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Circuit breakers are essential components in any electrical system, as they provide the necessary safety protection to the circuits by limiting the amount of current that can pass through the system and preventing any adverse effects.

IELHK111-30299-278-V is a high voltage circuit breaker, used primarily in industrial settings. It is a three-pole device, designed for use with a current rating of 630 A at an operating voltage of 690 V AC (nominal) in a single phase, or 1000V AC (nominal) in a three-phase system. It is constructed with adjustable protection, short circuit protection, and a thermal trip unit, which ensures the secure operation of the breaker.

The IELHK111-30299-278-V breaker operates by conducting current when the voltage across it is below a certain threshold. At this point, the current is too low for the device to conduct, and thus it turns off and ceases to allow further current flow. When an overload or short circuit occurs, a moderate to large amount of current flows and causes the device to become a conductor. This process is known as tripping and it safeguards the circuit from further overloads.

The adjustable protection feature allows the breaker to trip when the current exceeds a pre-set level or duration. This can prevent overheating and other damages to the device. In a three-phase system, the breaker can trip if one of the phases is overloaded or short-circuited. The short circuit protection feature ensures that the breaker will trip if a short circuit occurs in any of the phases. The thermal trip unit prevents the device from warming up to unsafe levels, further protecting it from damages.

The IELHK111-30299-278-V circuit breaker is primarily used in the power industry for safely and effectively protecting high voltage electrical systems. This device is also used in the automotive, aerospace, and marine industries as a safety measure against voltage and current overloads. Its adjustable protection and thermal trip features make it one of the most reliable circuit breakers available.

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