SE-704-0U

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SE-704-0U belongs to the category of protection relays and systems. It is an analog voltage relay. SE-704-0U is intended for overvoltage protection of single-phase and three-phase power systems, and in particular for protection against line-to-ground faults. It can also be used for overvoltage and undervoltage protection.

The SE-704-0U is a fully electronic over-current relay, offering overvoltage protection and efficient system monitoring and control. It is characterized by its high speed, accurate response, inverse-time delay operation and its ability to detect short-term overvoltages. The SE-704-0U has self-adaptive default settings, which allows it to adjust to the line voltage and determine the overvoltage settings, thus providing reliable protection. The SE-704-0U also has a watchdog timer, which monitors and logs the system for any abnormal conditions, including overvoltage. The SE-704-0U is designed to provide reliable system protection with an increased level of safety and reliability.

The working principle of the SE-704-0U is based on the principle of three-phase voltage detection. It is equipped with three separate voltage-sensing collectors, which detect the voltage of each phase respectively. If the voltage of any of the three phases exceeds the preset overvoltage threshold, the SE-704-0U will trip the corresponding relay. The relay can be set to trip automatically within a set delay time, or manually with a back-up switch.

The SE-704-0U is most commonly used in power systems, especially in substations where the transmission lines are exposed to varying levels of overvoltage or undervoltage. It is also used in motor control systems as well as in monitoring and control systems. It is suitable for use in a variety of control and protection applications, and it is reliable and cost-effective.

In summary, the SE-704-0U belongs to the category of protection relays and systems, and it is designed for overvoltage protection of single-phase and three-phase power systems. It operates on the principle of three-phase voltage detection, and it has self-adaptive default settings and a watchdog timer to ensure reliable operation. The SE-704-0U is suitable for a variety of control and protection applications, and it is an efficient and cost-effective protection solution.

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