991140 Circuit Protection

Series:	CB2200
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal Magnetic
Current Rating:	4A
Voltage Rating - AC:	480V
Voltage Rating - DC:	65V
Number of Poles:	1
Actuator Type:	Lever
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	DIN Rail

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Circuit breakers are electrical devices used to protect electrical circuits from overvoltage, overcurrent and overload. They are designed to be a fail-safe device that can identify when a circuit has become too dangerous and disconnect it from the power source. Circuit breakers come in various shapes and sizes, from miniature circuit breakers to larger industrial circuit breakers.The 991140 application field is power supply and motor control. It is a standard-sized miniature circuit breaker with three poles: one for protection from overload, one for protection from short-circuit and one for protection from ground faults. The 991140 can handle a maximum current of 6 A and a maximum voltage of 250 V. It has the ability to open and close a circuit multiple times, with no significant damage to the device.The working principle of the 991140 is based on a bimetallic strip, which is an electrical conductor that changes its resistance according to the temperature it is exposed to. When an overload or a short circuit occurs, the bimetallic strip heats up, causing it to bend and open the seperate contacts inside the breaker, thus opening the circuit. The bimetallic strip will cool down, returning to its original shape and re-closing the contacts when the overcurrent or overload is removed.The 991140\'s protection functions include short circuit protection, overcurrent protection, phase failure protection and ground fault protection. Short circuit protection occurs when the bimetallic strip heats up due to high electrical current, causing the breaker to trip. Overcurrent protection occurs when the current drawn by the electric circuit is too high and the currents flow the limit the breaker has been set to trip at. Phase failure protection occurs when one of the phases fails, causing a dramatic imbalance in the current flow and overload. Finally, ground fault protection occurs when there is an electric leakage, which can occur due to a grounded conductor, or a broken insulation in an electrical conductor.The 991140 has a locking mechanism, which keeps the breaker in an open position when activated and prevents it from being closed again without de-energizing the circuit. This prevents the device from being reset and a potential danger from occurring again. The 991140 is a reliable and cost-effective device for both residential and industrial applications. It can be used to provide protection from various electrical hazards, including overvoltage, overcurrent and overload. It is easily installed and maintained, making it an ideal choice for any circuit protection application.

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