Air-Insulated Medium-Voltage Switchgear NXAIR and NXAIR M
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Air-Insulated Medium-Voltage Switchgear NXAIR and NXAIR M Medium-Voltage Switchgear

Typical applications NXAIR and NXAIR M circuit-breaker switchgear is used in transformer and switching substations, mainly at the primary distribution level, e.g.: Application Public power supply Application Industry and offshore • Automobile industry • Traction power supply systems • Mining industry • Lignite open-cast mines • Chemical industry • Diesel power plants • Electrochemical plants • Emergency power supply installations • Textile, paper and food industries • Iron and steel works • Power stations • Petroleum industry • Offshore installations • Petrochemical plants • Pipeline...

Air-Insulated Medium-Voltage Switchgear NXAIR and NXAIR M Medium-Voltage Switchgear Catalog HA 25.71 ■ 2019 Invalid: Catalog HA 25.71 ■ 2017 siemens.com/nxair Application Page Customer benefit Ensures peace of mind 4 Basic panel design, operation 10 to 13 Three-position switch-disconnector / fuse combination 19 Circuit-breaker / fuse combination 20 SIQuench arc quenching device 25 Technical data NXAIR Product range, switchgear panels 27 to 29 Technical data NXAIR M Product range, switchgear panels 37 to 39 Standards, specifications, guidelines 44 to 46 The products and systems listed in...

Customer benefit Ensures peace of mind For power supply companies and industrial plants, the platform concept of the NXAIR family introduced at all production locations has very concrete advantages: Smooth operation, exemplary availability and optimal safety. Features • No handling of insulating gas and no pressure monitoring required • As insulating medium, air is always available • Factory-assembled, type-tested switchgear according to IEC 62271-200 or VDE 0671-200 • Platform concept introduced worldwide, centrally controlled development, local manufacture • Use of standardized block-type...

Customer benefit Saves lives A ll switchgear types of the NXAIR family are approved with internal arc classification IAC A FLR, loss of service continuity category LSC 2B, and partition class PM. This makes them suitable for universal installation, meeting the highest requirements regarding personal safety. Features • All operations with closed high-voltage door • Metallic enclosure, earthed shutters and partitions • Internal arc classified switchgear according to IAC A FLR (front, lateral and rear accessibility) for all short-circuit currents and an arc duration of 1 s • Loss of service...

Customer benefit Increases productivity Properties such as modular design, types tests of the switching devices in the switchgear, confinement of an internal arc to the respective compartment, and thus maximum operational reliability, contribute to optimum operation and a remarkable increase of productivity. Features • Loss of service continuity category LSC 2B • Partition class PM • Maximum degree of protection IP51 possible • Positively driven shutters • Use of standardized block-type current transformers • Cable testing without isolating the busbar • Functions such as establishment of...

Customer benefit Saves money T he compact design of the NXAIR family pays twice for owners due to the use of the new SION circuit- breaker series. On the one hand, building costs can be reduced in this way, and on the other hand, the maintenance-free circuit-breakers and the modular design enable continuous operation without expensive shutdown times. Features • Use of maintenance-free vacuum circuit-breakers or contactors • Maintenance-free within up to 10 years • Interruption of operation reduced to a minimum by logical mechanical interlocking system • Minimized space requirements (reduced...

Customer benefit Preserves the environment Air used as insulating medium, local production locations with short transportation ways and times, as well as a service life of more than 30 years, optimize the total energy balance. Features • As insulating medium, air is absolutely neutral to the environment • Local production presence in all regions, minimized energy consumption (CO2) regarding transport • Service life of more than 30 years optimizes the energy balance additionally • The materials used are fully recyclable without special knowledge • Easy disposal. Air-Insulated Medium-Voltage...

Circuit-breaker switchgear NXAIR and NXAIR M is factory-assembled, metal-enclosed and type-tested switchgear for indoor installation according to IEC 62271-200/VDE 0671-200 and corresponds to the following classifications. Type approval NXAIR switchgear has been type-approved by the following classification societies: Lloyd's Register DNV GL The switchgear is therefore also approved for application on ships and platforms. National approval GOST By certification in the system GOST R in Russia, NXAIR switchgear is approved for application at the voltage levels up to 12 kV. Compliance with the...

Basic panel design, operation - Circuit-breaker panel Basic panel design (example) NXAIR and NXAIR M Features • Integrated mimic diagram • Indication of the respective switch positions, circuit-breaker CLOSED/OPEN, disconnected position, earthing switch CLOSED/OPEN, on the integrated mimic diagram • Unambiguous assignment of actuating openings and control elements to the corresponding position indicators • All switching operations can only be performed with closed high-voltage door • Ergonomically favorable height for all control and indicator elements • Option: Verification of safe...

Basic panel design, operation – Circuit-breaker panel Basic panel design (example) – Duplex (back-to-back) NXAIR and NXAIR M 1 Door to low-voltage compartment 2 Protection device 3 ption: Capacitive voltage detecting O system for feeder and busbar 4 High-voltage door 5 Handle for high-voltage door 6 Mimic diagram 7 "CLOSED-OPEN" actuating openings for the circuit-breaker, opening for spring charging 8 Inspection window to recognize the "CLOSED-OPEN" indicator of the circuit-breaker, "closing spring charged" indicator, operations counter 9 Actuating opening for racking the switching device...