UTP28CH100YL

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The UTP28CH100YL series of devices is designed to allow a wide range of applications and to provide excellent performance in monitoring, controlling, and switching large currents. The device is a three-phase, four-layer, electromechanical device (Triple 3-phase EMD) and combines a solid-state relay, an electromechanical recloser, and a motor drive to provide reliable operation. The UTP28CH100YL is suitable for application in low-voltage AC (Supreme Electric, 2014) and DC systems, and is available in four models, including the UTP28CH100YL, UTP24CH100YL, UTP20CH100YL, and UTP15CH100YL.

The major application field of UTP28CH100YL is in the protection and control of electrical energy systems. It can be used for overcurrent protection or protection of equipment and personnel from current overloads, fusing or switching off of systems, and protection from short circuits and lightning strikes. It also offers fault-location capability in medium- and low-voltage systems. The UTP28CH100YL is also suitable for monitoring and controlling of frequency-dependent loads, such as motor soft starters, thyristor drives, and variable-speed drives. Additionally, the UTP28CH100YL can be used for phase-balancing in three-phase systems and power management in unbalanced systems.

The working principle of UTP28CH100YL is straightforward and reliable. It has two stages of breaking and closing and is designed to switch or re-close a faulted line or device in case of an overcurrent, as well as to perform repeated closing operations in accordance with preset conditions.

The first stage of breaking is controlled by a motor-driven mechanism that is activated in case of an overcurrent detection. This mechanism moves the contact arms and breaks the circuit in less than 10 ms. The second stage of breaking is provided by a motor-driven auto-recloser mechanism, which helps in faster reopening of the contact arms in case of a short circuit.

The next stage of the UTP28CH100YL working principle is the 10 ms closing operation that is controlled by the motor and the analog-to-digital converter. This stage allows for maintenance of the desired overcurrent level and helps to protect components in case of an overload, as the UTP28CH100YL has the capacity to break and re-close the same circuit several times to avoid damage.

Finally, the UTP28CH100YL stands out due to its automated power management. This feature is based on frequency-dependent parameters, which include voltage imbalance, frequency and overcurrent levels, and phase-angle differences. The device is equipped with a frequency monitor that constantly monitors all these parameters and is able to switch loads in order to maintain an optimal power delivery.

In conclusion, the UTP28CH100YL is a versatile and reliable device for use in protection and control of electrical energy systems. It has two stages of breaking and closing capabilities, as well as an advanced power-management system to ensure uninterrupted operation. The device is also suitable for monitoring and controlling frequency-dependent loads.

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