SQUARE D HDL26015 Circuit Breaker, 15A, 2 Poles, 600VAC, 14KA, Thermal Magnetic

Square D HDL26015 circuit breaker is a two-pole protection device that safeguards the electrical system against short circuits and overcurrents. It is useful in the construction, manufacturing, mining and energy industries.

Working Mechanism:

• Square D HDL26015 circuit breaker keeps track of the electric current passing through the circuit it is guarding.
• It has sensors that recognise when an overload or short circuit causes the current to exceed safe limits.
• The internal parts of the circuit breaker remain in their normal positions under normal circumstances where the current is within the safe range.
• The circuit remains closed, permitting continuous electrical flow through it.
• The circuit breaker's thermal-magnetic tripping mechanism is activated when an overload or fault is detected.
• This device's internal contacts move quickly to open the circuit.

Frequently Asked Questions:

Q. What is the difference between fixed and adjustable MCCB trip settings?

A. Fixed MCCB trip settings have predetermined overload & short-circuit protection values that cannot be changed by the user. Adjustable MCCBs allow users to customise trip settings within certain limits, providing more flexibility to match specific application requirements.

Q. What are the different pole configurations for MCCBs?

A. Square D offers MCCBs in single-pole, double-pole, three-pole and four-pole options. The pole configuration refers to the number of conductors the MCCB can interrupt simultaneously.

Q. How to ensure longevity of Square D moulded case circuit breakers?

A. Regular testing and maintenance are recommended to ensure the proper functioning of MCCBs.

Q. What is the difference between inverse time and instantaneous trip settings?

A. Inverse time trip settings in MCCBs provide a delayed response to overcurrents. The longer the overcurrent persists, the quicker the trip occurs. Instantaneous trip settings, on the other hand, result in an immediate trip response once the current exceeds a certain threshold.