2907535

Series:	TMC 8
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal Magnetic
Current Rating:	50A
Voltage Rating - AC:	240V
Voltage Rating - DC:	125V
Number of Poles:	2
Actuator Type:	Lever
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	DIN Rail

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Circuit Breakers Circuit breakers are an essential component in any electrical installation. They protect against both overcurrents, overvoltages and any other electrical hazards that may occur. The circuit-breaker is designed to be the first line of defence between the electrical system and a host of adverse conditions that may occur.The most common type of circuit breaker is the thermal-magnetic trip. This type of breaker has two thermal elements, one for over current protection, known as the overload trip, and a second for short circuit protection, known as the short circuit trip. The thermal elements work in combination with a bimetallic element and an electrical magnet.The thermal-magnetic trip type is usually installed in domestic, light commercial and industrial installations. It is designed to trip the circuit in the event of an overload, due to excessive current flow, or in the event of a short-circuiting resulting in a rapid rise in current. The thermal trip works by sensing an increase in temperature caused by the current flow, and the magnetic trip works by sensing an increase in flux density caused by the current flow.When the circuit is closed, a current flows through the thermal element and produces a voltage, called the pick-up voltage, in the bimetallic element. When the current reaches thePick up setting (PU), the bimetallic element bends and moves the contacts together. When the current exceeds thePU setting, the polymer strip melts due to the generated heat and releases theswitch on lever, tripping the circuit breaker.The Thermal-Magnetic trips also have an adjustable short circuit rating, known as the short circuit factor (SCF). The SCF is adjusted through a rotating switch in the housing of the circuit breaker and is used to adjust the level of the short circuit current, the rated level at which the breaker will trip. The thermal element in the circuit breaker will detect a rapid rise in current and, in combination with the magnetic trip, trips the breaker, protecting the system from any damage.The thermal-magnetic trip is available in a variety of sizes, ranging from very small domestic breakers to larger industrial breakers. It is often used as the main switch in the main distribution board (MDB) or the sub-distribution board (SDB). The thermal-magnetic tripping response time is much faster than other types of protection and can be adjusted to cater for varying levels of overloads.2907535 application field and working principleCircuit breakers are used in a variety of electrical systems and applications, in both domestic and industrial environments. They are commonly used as the main switch in domestic and commercial applications such as residential houses, shops and offices. They are also used in a variety of industrial applications, such as process control systems and diesel generators.The most common application for circuit breakers is in the form of a protective device, where the breaker trips when an overload or short circuit is detected. The mechanism for this trip is the thermal-magnetic trip, which uses two thermal elements combined with a bimetallic element and an electrical magnet.When the circuit is closed, a current passes through the thermal element, producing a voltage in the bimetallic element. When the current reaches the Pick up setting (PU), the bimetallic element bends and moves the contacts together, closing the circuit. If the current then exceeds the PU setting, the polymer strip melts due to the generated heat and releases the spring to trip the circuit, protecting the system from overcurrents or short circuits.The thermal-magnetic trip is adjustable and can be set to cater for varying levels of overloads, as well as different short-circuit ratings. It is also capable of detecting a rapid rise in current flow and tripping the breaker more quickly than other types of protective devices. In addition to its use as a protective device, the thermal-magnetic trip is also frequently used as a switching device. It can be used to switch off the power supply to an appliance or piece of equipment, to turn on a motor, or to start and stop an electrical process. It is also used in safety applications such as emergency stop circuits and emergency power supply. The thermal-magnetic trip is an essential component in any electrical installation and is designed to protect the system and its users from any potential electrical hazards. Its adjustable settings and quick response time make it an ideal choice for a wide range of applications. With its versatility and reliability, it is no wonder that the thermal-magnetic trip is the preferred choice when it comes to circuit protection.

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