EATON HFD3040L Molded Case Circuit Breaker, Type Hfd, 3-Pole, 40A, 600 Vac, 250 Vdc, Line And Load

Eaton HFD3040L C is a robust molded case circuit breaker that protects electrical circuits from overloads and short circuits. It is ideal for distribution panels, switchgears and control panels, ensuring the safety and reliability of electrical circuits.

Working Mechanism:

• Eaton HFD3040L C molded case circuit breaker operates by continuously monitoring electrical current.
• In case of a prolonged overload, a bimetallic strip inside the breaker heats up and triggers the trip mechanism, causing the contacts to separate and interrupt the current flow.
• For short circuits with high current spikes, a magnetic trip component rapidly activates, aiding in the quick opening of the contacts.
• The breaker is designed to swiftly extinguish any resulting electrical arcs. After a fault is resolved, the breaker can be manually reset to restore normal operation, ensuring the safety and reliability of electrical systems.

Features:

• Eaton HFD3040L C molded case circuit breaker features a high interrupt rating of 65kAIC at 480VAC, guaranteeing exceptional fault current interruption capabilities.
• This circuit breaker offers both fixed thermal and fixed magnetic trip types, ensuring precise protection against overcurrents.
• It is equipped with a three-pole configuration, enabling comprehensive disconnection of all three phases in a three-phase electrical system.
• This circuit breaker includes line and load terminals for clear and secure electrical connections, simplifying installation and maintenance processes.
• It operates at a frequency rating of 50 / 60 Hz, making it suitable for operation in diverse regions and electrical environments.

Frequently Asked Questions:

Q. What is the difference between MCCBs and fuses?

A. Fuses contain a metal element that melts when there is an excess current due to overload, while MCCBs have an internal switch that breaks the circuit when there is excess current.

Q. How do you reset an MCCB after it has tripped?

A. After a fault condition is cleared, an MCCB can be manually reset by turning it off and then back on. However, it's essential to identify and resolve the underlying issue before resetting the breaker to prevent repeated tripping.

Q. How do you select a right MCCB for my application?

A. Consider the voltage & current rating of the application, the type of load and any special requirements, such as environmental or hazardous location considerations.