What are the application scenarios for ASNA RMU/Switchgear?

The air filtration device consists of a housing, filter materials and other components. When a pressure difference occurs between the inside and outside of the sealed enclosure, air exchange takes place through this device. Meanwhile, it can effectively block dust, salt spray and other solid particulates from entering the sealed enclosure.

Available tripping coil options include conventional tripping coils, low power tripping coils (for self powered protection relays), and under voltage trip coils. Only conventional closing coils are available. For the manual charge operating mechanism, up to two tripping coils can be fitted. Closing coils are normally not supplied, though one closing coil may be optionally fitted. For the electric charge operating mechanism, two tripping coils and one closing coil can be selected.

Excluding the secondary top compartment, the minimum height of the 24 kV switchgear is 1700 mm. This height imposes considerable constraints on the installation of CTs and busbar PTs. It is recommended to select 1 A for the CT secondary current. Please consult us for detailed accuracy class and burden parameters. If busbar PTs are adopted, please consult us on the installation arrangement.

Pressure relief vents are fitted as standard across all cabinet types. The IAC internal arc classification is AFLR 20 kA/1 s, 25 kA/1 s and 31.5 kA/0.5 s.

For outdoor RMU, a wide range of outdoor enclosure options are available, with stainless steel and SMC constructions. Various designs are also offered. Depending on the characteristics of different surroundings, custom decorative finishes can be applied to the enclosures so they blend in with the environment.

The cable bushings are designed according to EN 50181 Type C. Matching European type separable cable accessories shall be adopted.