ER4-400N3PR

ER4-400N3PR is a type of disconnect switch component for electrical power system. It is widely used in power generation, low voltage distribution and other electrical industries. The ER4-400N3PR switch component has many advantages, including safety and reliability, low cost, easy installation, and long life.

Application Field

ER4-400N3PR is mainly used for the protection and control of power supply, and in various chemical, petroleum, textile, metallurgical, and other industries. It is mainly used as a disconnect switch for circuit protection, and for mechanical equipment, control and power equipment. In addition, it is also used as an emergency stop switch, trip switch, and overload protection switch for circuits and machinery.

Working Principle

The ER4-400N3PR disconnect switch component consists of a three-phase power switch with an overload protection device, which is composed of a movable contact, a switch base, a movable contact spring and a switch handle. The switch handle is connected to a mechanism that is used to move the movable contact and the contact spring into and out of contact with the switch base. When the switch is closed, the contact spring and the movable contact make contact with the switch base, allowing the current to pass through the circuit. When the switch is opened, the contact spring and the movable contact move away from the switch base, breaking the flow of current through the circuit.

The overload protection device is used to protect the circuit from overloading and will automatically cut off the power supply if the current exceeds a certain level. It is designed to reduce the risk of fire, electric shock, and other accidents caused by overloading. The overload protection device also helps prevent any damage that may occur to electrical components due to sustained short circuit currents or prolonged peak overloads.

Conclusion

ER4-400N3PR is a type of disconnect switch component for power systems. It has many advantages, such as safety and reliability, low cost, easy installation, and long life. It is mainly used for circuit protection and emergency stop purposes, and is equipped with an overload protection device to safeguard against overloading. It has become an indispensable component of the power system due to its wide range of applications.