1DU40L

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Circuit breakers are designed to protect electrical circuits, equipment, and people from damaging high-voltage events. Amongst their many functions, they are used to monitor the flow of electricity, trip on overcurrent, and reset the circuit when it’s safe. In this article, we will discuss the Differential Unit 1DU40L Intended application field and working principle.

The Differential Unit 1DU40L is a type of high-voltage circuit breaker intended for use in Medium Voltage Networks with rated voltages up to 20kV and for currents up to 4000A. It is suitable for the measurement and protection of medium voltage electrical networks, including the protection of motors with different speeds, medium-sized generators, transformers and other sensitive electrical equipment.

The Differential Unit 1DU40L is composed of two columns: one is the control assembly, which contains the electronic and electrical control components; the other is the operational assembly, which contains the switching components and the relay elements. The two columns are connected by a common power bus. All the control and operational parts are hermetically encapsulated in an aluminum alloy box. This makes it ideal for a wide range of applications.

The Differential Unit 1DU40L is based on two operating principles: the differential protection principle and the instantaneous overcurrent protection principle. The differential protection principle monitors the deviations between the measurement values at two input terminals of the differential unit. It is used for the protection of medium voltage networks. The main advantage of this principle compared with the overcurrent or thermal protection is the quickness of the response to the faults and the immunity from external electrical disturbances.

The Differential Unit 1DU40L is also equipped with an instantaneous overcurrent protection principle. This principle detects the last instantaneous value of the current that is passing through the circuit. If there is an overcurrent in the system, it will open the circuit breaker quickly in order to protect the equipment from any overload or short-circuit. This overcurrent protection principle is adjustable and can be used to protect motor and generator loads.

The Differential Unit 1DU40L has a number of built-in features that improve its usability and make it easier to use in remote locations. It is equipped with an adjustable trip time setting and adjustable current setting that enable it to be configured for different applications. This makes it possible to set the breaker’s response to match the load and the environment. Additionally, the Differential Unit 1DU40L is also equipped with an optional test switch, which allows the user to test the unit’s settings, as well as a self-testing protocol, which allows the user to ensure that the breaker is working as intended.

The Differential Unit 1DU40L is an advanced overcurrent protection device that can be used for a wide range of medium voltage applications. Its combination of the differential protection principle and the instantaneous overcurrent protection principle make it an ideal choice for protecting electrical equipment from any risk of overload or short circuit. Additionally, the unit’s built-in features, such as adjustable settings and test capabilities, make it easier and more reliable to use in remote locations.

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