IUGF66-32019-15 Circuit Protection

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Circuit Breakers

IUGF66-32019-15 is a type of circuit breaker designed for the medium-voltage protection of power distribution systems in a wide range of applications. It has a rated voltage of Ue=12kV, a rated normal current In up to 1250 A, and an instantaneous short-circuit breaking current up to 40kA. It is made up of a housing, a contact system, an arc extinguishing chamber, and an operating mechanism.

Application Field

IUGF66-32019-15 circuit breaker can be used in a range of applications where overload protection and short-circuit protection is required. The circuit breaker is suitable for operation in distributed systems such as industrial plants, commercial buildings, and power plants. It is also suitable for use in public and private transport networks, outside substations, and as a main or branch switch in switchboards.

Working Principle

The circuit breaker is designed to prevent damage to electrical equipment from overcurrent caused by short circuits, overloads, or a failure in the power source. When an overcurrent is detected, the circuit breaker will be triggered, breaking the circuit and cutting off the power.

The breaker is composed of a contact system, an arc extinguishing chamber, and an operating mechanism. When a fault current is detected, the trip coil is energized and the operating mechanism begins to move the contacts. As the contacts open, an arc is formed between them as the current passes from one contact to the other. If the fault current passes the pre-set cutoff limit, the arc is extinguished by an arc-extinguishing medium, typically a gas-filled chamber. After the arc has been extinguished, the contacts remain open, thus breaking the circuit and tripping the breaker.

IUGF66-32019-15 circuit breaker is also equipped with an adjustable auxiliary switch, which can be used to indicate the open or close state of the contact, or even operate alarms or other equipment such as a circuit breaker indicator. This switch is an additional safety feature and helps to reduce the risk of damage or unexpected operation.

Conclusion

The IUGF66-32019-15 circuit breaker is designed for the medium-voltage protection of power distribution systems in a wide range of applications. It is composed of a contact system, an arc extinguishing chamber and an operating mechanism, which together provide reliable overload and short-circuit protection. The breaker also comes with an adjustable auxiliary switch, which can be used to indicate the open or close state of the contact and provide additional safety.

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