This product is designed for indoor AC 50Hz systems with rated voltages of 3.6kV, 7.2kV, 12kV, 24kV, and 40.5kV . It integrates seamlessly with load switches, vacuum contactors, and other electrical components to provide short-circuit and overload protection for power transformers and related equipment . Additionally, it serves as a critical component in high-voltage switchgear, ring main units (RMUs), and high/low voltage prefabricated substations.