401X

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The 401X series are a range of two-pole and three-pole overcurrent protection relays designed to provide optimum protection of motor, transformer, feeder and other electrical equipment against overcurrents and short circuits. The 401X series is particularly well suited for applications in challenging environments, due to its extremely high accuracy and its robust and reliable construction. This makes it suitable for a wide range of protection applications, from electrical distribution networks to industrial process control and automation systems.

The 401X series includes two-pole (402X) and three-pole (404X) protection relays that are suitable for a variety of applications, such as overcurrent protection, ground fault protection, motor protection, and transformer protection. The 401X series relays feature a high accuracy and fast response, allowing them to provide reliable protection against high current and voltage fluctuations.

The 401X series features a variety of working principles, including inverse time delay, undervoltage, overvoltage, polarizing, and current reversal (phase reversal) protection. Inverse time delay protection is designed to detect large current surges and protect against overcurrents by activating a circuit breaker or fuse. Undervoltage protection is designed to detect and protect against voltage drops below a specified threshold. Overvoltage protection is designed to detect and protect against voltage increases above a specified threshold. Polarizing protection is designed to detect and protect against single-phase shorts due to phase reversal. Lastly, current reversal protection is designed to detect and protect against currents flowing in the reverse direction.

The 401X series provides numerous benefits, such as improved safety and reliability of electrical systems, as well as improved energy efficiency. The high accuracy of the 401X relays ensures that they are able to accurately detect and respond to dangerous short circuit and overload conditions. Additionally, the sophisticated protection algorithms employed by the 401X series relays allow them to accurately detect and respond to varying circuit conditions with minimal errors. This improves system reliability and reduces the possibility of false or delayed tripping, resulting in improved safety.

The 401X series is designed to be easy to install and operate, and is compatible with both ABB and Siemens PLCs, as well as other leading automation systems. It is also available with a range of communication protocols, such as MODBUS, CAN and Ethernet, allowing engineers to easily integrate the 401X series into existing networks. Additionally, it is available with comprehensive I/O options, allowing it to be adapted to the specific application requires.

In short, the 401X series of protection relays are designed to provide reliable and accurate overcurrent protection for various motor, transformer, feeder and other electrical equipment. They feature a high accuracy and fast response, and are available with a wide range of working principles, communications protocols, I/O options and compatible automation systems. This makes the 401X series an ideal choice for protecting large electrical systems, from electrical distribution networks to industrial process control and automation systems.

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