2A1909-14

In the industrial automation and control industry, 2A1909-14 is a type of accessory used for the control of switching and interrupting large electrical current in the main circuit. This large power switch is designed with a wide range of applications including motor control, generator control, and insulation monitoring. This article will discuss the application field and working principle of the 2A1909-14.

Application Field

The 2A1909-14 switch is typically used in power load switching and interruption of high-voltage and high-power circuits, as well as in motor control. It is capable of handling load current from 0 to 4500A, with tolerance of up to 14kA. It is suitable for AC 50Hz and DC rated operation systems, and has a thermal magnetic trip switch function, which helps to protect the circuit by cutting off power in case of over-current or short circuit.

This device is used in some crucial applications such as transformer substations, where it is used to control the power switch disconnectors that are connected to various secondary circuits, as well as in the distribution systems of large industrial and commercial sites.

Working Principle

2A1909-14 switches are based on the operating principle of a thermal overload protector. These switches come with a thermally sensitive bimetallic element and a magnetic trip switch. When the current running in the device exceeds the pre-set threshold, the thermally sensitive element will detect the temperature rise, causing it to change shape and activate the magnetic trip switch, cutting off the power supply in the device. This helps to prevent the connected circuits from being damaged by over-current or short circuit.

The device also has a manual reset function, which can be used for resetting the switch, once the fault or over-current situation has been resolved. When the manual reset button is pressed, the circuit is re-energized and the device can be used again.

Conclusion

The 2A1909-14 switch is a type of accessory used in industrial automation and control, primarily for switching and interrupting large electrical currents. This device has a wide range of applications, including motor control, generator control, and insulation monitoring. Its working principle involves a thermally sensitive bimetallic element and a magnetic trip switch, which ensure that the device is able to cut off the power supply in case of over-current or short circuit.