Ensuring the longevity and reliable performance of your electrical systems is paramount. Chint's OUVT-X1 Over/under Voltage Release is designed to be integrated with circuit breakers, providing crucial protection against voltage fluctuations. Rated for AC 240V at 50Hz, this release is set to operate when the voltage exceeds 95% to 105% of its over-voltage setting value, typically 280V. Conversely, it will trip the circuit breaker if the voltage drops below 35% of the rated value (Ue). The OUVT-X1 is compatible with the NXB-63 series circuit breaker and boasts a mechanical and electrical life exceeding 4000 cycles. This includes 500 cycles dedicated to both over-voltage and under-voltage trips, ensuring it can handle a significant number of operational cycles. Weighing just 0.05 kg, the OUVT-X1 is easily integrated into your existing electrical setup. For installation, refer to the provided assembly diagram, which details the process of integrating the OUVT-X1 with the NXB-63 circuit breaker and mounting them on a TH3.5-7.5 steel mounting rail.