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Protection relays and systems play an important role in ensuring the security and reliability of power supplies. They play a role in preventing power overloads, short circuits, voltage sags, and other power system faults and disturbances from causing electrical damage or instability. The WUV-3-480 is a type of protection relay and system. The WUV-3-480 is a two-pole, under/overvoltage relay with bi-directional blocking function and adjustable under/over pick-up. It has a wide range of application fields, such as in electric power, electricity meters, appliances, automotive, shipbuilding and railway industries as well as in data acquisition and control systems.The WUV-3-480 works by monitoring the voltage between the two connected poles. It continuously compares this voltage with two adjustable levels of over- and under-voltage. When the voltage exceeds one of these levels, the WUV-3-480 will either raise an alarm or disable the connected equipment. This allows the WUV-3-480 to work as a protection system to protect both the equipment and the power supply.The WUV-3-480 is composed of four basic components. First, it has a voltage sensing module, which monitors the voltage in the two connected poles. Second, it has an over/under trip relay, which actuates the contact closure when the voltage crosses the adjustable trip values. Third, it has an adjustable bi-directional blocking system, which prevents the voltage from rising higher than the trip values. Finally, it has an additional protection function, which will prevent the connected device from being damaged in the event of an overvoltage or undervoltage.The WUV-3-480 can be used in a variety of applications and setups. It can be used in a wide variety of residential and industrial installations. It is ideal for use in areas where there is a risk of power disruption due to voltage fluctuations. It can also be used in circuit breakers and electric meters, as well as in data acquisition and automation systems.Due to its versatility, the WUV-3-480 is an important protection device for a variety of electrical systems. It can be used to ensure stability and protection in power supplies and prevent damage or instability from voltage fluctuations. By continuously measuring the voltages between the two connected poles and actuating the contact closure when the voltage exceeds the trip levels, the WUV-3-480 can function as a valuable protection system.

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