LSA1A3

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Snap action, limit switches are a type of switch which is activated when it reaches its preset limit of travel. A pressure-activated switch, such as the and LSA1A3, is built to respond to an overload by switching off the circuit carrying the overload. This switch typically consists of a spring arm, a moving actuator, and a contactor which is held in a preset position. When the actuator and contactor come into contact with the overload, a force is applied to the spring arm, which causes it to move. As the arm moves, it increases the internal pressure, which trips the contactor, thus switching off the circuit.The LSA1A3 is a snap-action, pressure-activated switch designed for use in motor control, safety systems, and process control applications. It operates with a fixed differential pressure and enables the switching of electrical circuits when that differential pressure is breached. It is typically used for temperature control, alarm systems, security systems, flow control, and emergency shutoff.The LSA1A3 operates on any voltage or current within its rated range, and offers protection against surge or overload conditions. It is constructed with a stainless steel housing and a PPS spring, which are resistant to mechanical and thermal shock as well as to corrosion. The device is rated for use in temperatures up to 200 degrees and is dust-tight and water-resistant.Working principleThe LSA1A3 works by sensing the differential pressure that exists between two points in a system. When the difference in pressure between the two points exceeds the switch\'s pre-set limit, the LSA1A3\'s actuating arm is pushed, activating the switch and allowing the circuit to be switched off. This switch offers protection against overload and surge, in addition to its primary application of measuring pressure in a system.At the heart of the LSA1A3 are five components: a latch, a plastic spring, a metallic pin, a housing, and a contactor. When the pressure differential between the two points exceeds the switch\'s pre-set limit, it causes the plastic spring to deform, bending the metallic pin and pushing the latch. This causes the movable contactor to move, thus interrupting the circuit and switching it off.When the pressure differential drops below the pre-set limit, the spring returns to its original position and the actuator is reset. This allows the circuit to be switched back on, restoring normal functioning.Application FieldThe LSA1A3 is a versatile device, suitable for use in a range of fields. It is primarily used in motor control, process control, and safety systems, providing an effective means of tripping the circuit when the pressure differential reaches its pre-set limit. The LSA1A3 may also be used in other applications, such as temperature control and firing warning systems.The LSA1A3 is suitable for use in hazardous environments and is designed to be resistant to dust and water. It is rated for use in temperatures up to 200 degrees, making it suitable for use in industrial and mechanical applications.In conclusion, the LSA1A3 is a versatile and reliable snap-action limit switch, suitable for use in a range of applications. It is a reliable, easy-to-use device, offering protection against overload and surge. Its use of a stainless steel housing and a PPS spring set it apart from other switches, making it an ideal choice for use in hazardous environments.

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