3 Features
The air-insulated medium-voltage switchgear type NXAIR has the following features:
• Factory-assembled, type-tested, metal-enclosed and metal-clad switchgear for indoor installation
• Type of accessibility A
• Internal arc classification (IAC): IAC A FLR ≤ 40 kA 1 s or IAC A FL ≤ 40 kA 1 s according to
IEC 62271 Part 200
• Loss of service continuity category: LSC 2B (metal-clad) and LSC 2A (swtich-disconnector panel)
• Partition class: PM (metallic partition) and PI (shutter made of insulation material for switch-
disconnector panel)
• All switching operations can be carried out at the panel front with the high-voltage door closed
• Standard degree of protection IP3XD for the metal enclosure according to IEC 60529
• Metallic, positively driven shutters protect against accidental contact with live parts inside the panel
• Logical interlock between actuation, circuit-breaker, switch-fuse combination, disconnecting function
and feeder earthing switch operating mechanism prevent maloperation
• Earthing of feeders by means of earthing switches with short-circuit making capacity
• Mechanical position indicators for the withdrawable part / switching-device truck and the feeder
earthing switch integrated in the mimic diagram at the panel front
• Enclosure made of galvanized sheet steel
• Front doors and lateral switchgear end walls are powder-coated with resistant epoxy resin material
• Individual modular compartments in solid-wall design
•
Modular compartments bolted together
Further information to design features and design options is given in catalog HA 25.71.
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