Catalog HA 25.72 · 2022 MEDIUM-VOLTAGE SWITCHGEAR Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated siemens.com/nxair Application Typical applications NXAIR H circuit‑breaker ­switchgear is used in ­transformer and switching substations, mainly at the primary distribution level, e.g.: Application: Industry • Power stations • Cement industry • Iron and steel works • Rolling mills • Mining industry • Textile, paper and food industries • Chemical industry • Petroleum industry • Pipeline installations • Electrochemical plants • Diesel power plants • Emergency power supply installations • Traction power supplies • Airports • Wind parks. 2 R-HA25-701 jpg R-HA25-702 jpg R-HA25-700 jpg R-HA4143_0149 jpg Application: Public power supply • Power supply companies • Energy producers • System operators. Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 ContentsPage MEDIUM-VOLTAGE SWITCHGEAR Application Circuit-Breaker ­Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated Ensures peace of mind Saves lives Increases productivity Saves money Preserves the environment Catalog HA 25.72 · 2022 Components Invalid: Catalog Siemens India - Edition 2019 siemens.com/nxair 2 Typical applications Customer benefits 4 5 6 7 8 Design Classification Operation at the panel Basic panel design Compartments – Circuit-breaker panel Vacuum circuit‑breaker, switching-device truck Current transformers Voltage transformers Low-voltage compartment Digitalization – Arc flash protection 9 10 11 12 13 14 15 16 17 Technical data Electrical data Dimensions Room planning Product range 18 19 20 21 Standards Standards, specifications, guidelines 23 The products and systems described in this catalog are ­manufactured and sold according to a certified ­management system (acc. to ISO 9001, ISO 14001 and BS OHSAS 18001). Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 3 Customer benefits Ensures peace of mind Ensures peace of mind For power supply companies and industrial plants, the certification of the NXAIR H according to the latest standards has very concrete a ­ dvantages: smooth operation, exemplary a ­ vailability, and maximum 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 standard components available worldwide, locally manufactured components, considering regional standards • Use of maintenance-free vacuum circuit‑breakers • Type testing of the main switching devices and the make-proof earthing switch in the panel • Flexibility regarding the low-voltage equipment (removable compartment, plug-in wires) • Quality assurance in accordance with DIN EN ISO 9001. 4 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Customer benefits Saves lives Saves lives NXAIR H is approved with internal arc classification IAC A FLR, loss of service continuity category LSC 2B, and partition class PM. This makes it 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 and 0.1 s • Loss of service continuity category LSC 2B (separate partitioning of the busbar, connection and switching-device compartments) • Partition class PM (metal partition) • Clear switch position indicators and control elements on the high-voltage door • Use of vacuum circuit‑breakers • Standard degree of protection IP4X • Logical mechanical interlocking system. Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 5 Customer benefits Increases productivity Increases productivity Use of metallic, earthed shutters and partitions between the compartments ensures maximum service continuity of the switchgear during maintenance. Features • Loss of service continuity category LSC 2B • Partition class PM (metal partition) • Maximum degree of protection IP4X • Cable testing without isolating the busbar • Functions such as establishment of the isolating distance, as well as feeder and busbar earthing, can be completely controlled from remote • Use of maintenance-free vacuum circuit‑breakers • Control cables in metallic wiring ducts. 6 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Customer benefits Saves money Saves money Thanks to the use of the new SION circuit‑breaker 3AE5 series, the ­cost-efficient design pays twice for owners. On the one hand, building costs can be reduced, 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 building investments) due to compact design and flexible pressure relief duct system. Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 7 Customer benefits Preserves the environment 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 • Service life of more than 30 years optimizes the energy balance additionally • The materials used are fully recyclable without special knowledge. 8 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Design Classification Circuit‑breaker switchgear type NXAIR H is type-tested, ­metal-enclosed switchgear for indoor installation according to IEC 62271‑200 and corresponds to the following ­classifications. Loss of service continuity category and partition class Loss of service continuity category Panels with ­connection ­compartment Panels without ­connection ­compartment Circuit‑breaker panel LSC 2B Metering panel Bus sectionalizer No LSC ­assigned, as no connection ­compartment ­available Partition class PM (metal partition) Accessibility to compartments Busbar compartment Switching-device ­compartment Connection compartment Low-voltage compartment Tool-based Interlock-controlled Interlock-controlled or tool-based Tool- based Internal arc classifications The following internal arc ­classifications are fulfilled: IAC A FLR, ISC, t IAC A F L R R-HA2572-007 tif ISC t Internal arc classification Distance between the indicators 300 mm, i.e. installation in rooms with access for authorized personnel only, closed electrical service location Accessibility: Front arrangement of indicators for test Accessibility: Lateral arrangement of indicators for test Accessibility: Rear arrangement of ­indicators for test Test current for NXAIR H up to 31.5 kA Arc duration (0.1 s and 1.0 s) In this way, NXAIR H switchgear is suitable for unrestricted application (wall- or free-standing arrangement) in electrical service locations up to the maximum short-circuit ratings. Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 9 Design Operation at the panel Operation at the panel Features Interlocks • Integrated mimic diagram • Interlocking conditions are satisfied according to • 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 isolation from supply for feeder IEC 62271‑200 • Earthing switch can only be operated with circuit‑breaker truck in test position • Circuit‑breaker can only be moved with both circuit‑breaker and earthing switch in OPEN position • Interlocking of high-voltage door against circuit‑breaker truck • The high-voltage door can only be opened when the circuit‑breaker truck is in test position • Option: Electromagnetic interlocking • Option: Padlocks. by means of the voltage detecting system with panel front closed. 10 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Design Basic panel design Basic panel design NXAIR H Detail Y Detail Z 1 2 3 4 5 oor to low-voltage compartment D Protection device Option: Voltage detecting system for feeder High-voltage door Handle for opening the ­high-voltage door 11 M echanical position indicator for withdrawable part position 12 Operating slide for opening and closing the actuating opening for racking the switching-device truck 13 Actuating opening for inserting the hand crank for racking the switching-device truck 14 Actuating opening for inserting the double-bit key to control racking of the switching-device truck Detail Y 6 Rotary button to close and open the actuating opening located below 7 Opening for charging the spring in the circuit‑breaker manually 8 Actuating opening for opening the circuit‑breaker 9 Actuating opening for closing the circuit‑breaker 10 Inspection window to recognize the CLOSED-OPEN position indicator, spring state indicator, and operation counter of the circuit‑breaker Detail Z 15 Mechanical position indicator for feeder earthing switch 16 Actuating opening for feeder earthing switch 17 Operating slide for opening and closing the actuating opening for operating the feeder earthing switch 18 Bushing-type insulator 19 Contact system 20 Switching-device truck with operating and interlocking unit for racking the switching device 21 Operating mechanism for feeder earthing switch 22 Pressure relief duct for IAC 1.0 s 23 Busbar 24 Current transformer 25 Option: Fixed-mounted voltage transformer 26 Option: Surge arrester 27 Make-proof earthing switch 28 Cable connection A B C D E Switching-device compartment Busbar compartment Connection compartment Withdrawable circuit‑breaker Low-voltage compartment Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 11 Design Compartments – Circuit-breaker panel Switching-device compartment Connection compartment • All switching operations with high-voltage door closed • Pressure relief upwards through rear pressure relief duct • Pressure relief upwards • Suitable for connection of single-core cables or • Panel front powder-coated with epoxy resin three‑core cables 1) • Standard color RAL 7035 • Earthing busbar • Metallic, earthed shutters ensure partition class PM • Interlocked high-voltage door and switching-device • High-voltage door pressure-resistant in the event of ­internal arcs in the panel compartment provide interlock controlled and tool-based access for panels with connection from rear • Lateral metallic wiring duct for laying the control cables • Connection from front/bottom (wall-standing ­arrangement) • Switching-device compartment to accommodate compo- • Connection from front/bottom or rear (free-standing nents for implementing various panel versions with – Vacuum circuit‑breaker truck – Withdrawable earthing truck 2) arrangement) • Installation of block-type current transformers and window‑type 1) current transformers. – Withdrawable metering truck • Endurance classes for – Circuit‑breaker: E2, M2, C2 – Isolating distance (withdrawable part): M0 manually for vacuum circuit‑breaker truck. Components at the panel connection (option) • Single-core XLPE cables – Quantity depending on the rated continuous current and Busbar compartment • Pressure relief upwards • Hollow triangular busbars other built-in components • Three-core cables 1) – Quantity depending on the rated continuous current and other built-in components – For rated continuous current of up to 2500 A • Coupling electrode for capacitive voltage detecting system – With insulation and shrouds at joints • Installation of voltage transformers • Bolted top covers provide tool-based access. – Cast-resin insulated – 3 × 1-pole – Fixed-mounted, with or without primary fuses – Or withdrawable with primary fuses • Make-proof earthing switch – With manual operating mechanism – In addition to the standard interlock: Earthing switch optionally lockable or electromagnetically interlocked against the withdrawable switching device • Endurance class for earthing switch: M0, E1 • Surge arresters – Protection of the switchgear against external overvoltages. 1) Available as an option 2) In India region only 12 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Components Vacuum circuit‑breaker, switching-device truck Vacuum circuit‑breaker Features • According to IEC 62271‑100 • Suitable for all switching duties • Stored-energy spring mechanism with motor operation; manual ­operation always possible • Racking the circuit‑breaker with manual operating ­mechanism • Maintenance-free operating ­mechanisms under normal climatic conditions and for the max. p ­ ermissible number of operating cycles R-HA2572-006 jpg • Embedded pole design • 64-pole low-voltage plug connection between circuit‑breaker and fixed part of the panel. Vacuum circuit‑breaker truck, front view Switching-device truck Features • 4 NO + 4 NC auxiliary switch contacts at the carriage ­mechanism indicate the service and test position of the truck • Interlocks to the panel door and the earthing switch are integrated in the operating mechanism box • The truck is mechanically interlocked with the circuit‑breaker • 25 kA / 26.3 kA and 31.5 kA, with silver-plated tulip contacts. Electrical data for NXAIR H Rated operating voltage Rated short-circuit ­breaking current Rated short-time withstand current Rated short-circuit ­ making current Rated peak withstand current Rated continuous current Endurance class kV up to 36 kA up to 31.5 kA up to 80 / 82 kA up to 80 / 82 R-HA2572-005 png kA / 3 s up to 31.5 A up to 2500 E2, M2, C2 Vacuum circuit‑breaker truck, rear view Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 13 Components Current transformers Current transformers Features • Inductive indoor support-type current transformer, block type, according to IEC 61869-2, VDE 0414-9-2, R-HA25-347 eps ­standardized, available worldwide – Cast-resin insulated – Insulation class E – Narrow design according to DIN 42600 Part 8 – Option: – With coupling electrode for voltage detecting system – Secondary multiratio possible • Current transformer with type approval and declaration Block-type current transformer up to 2500 A Electrical data Operating voltage kV Rated primary current A Short-time kA thermal current Duration of s short-time current Rated peak kA withstand current Number of nos. ­secondary cores Secondary current A Accuracy classes Measuring Protection Rating VA Block-type current transformer Window-type 1) current transformer up to 36 up to 2500 up to 31.5 up to 36 1600 to 2500 up to 31.5 1 or 3 1 or 3 up to 82 up to 82 up to 3 up to 3 1 or 5 0.2 – 1 FS5 / FS10 1 5P / 10P up to 30 1 or 5 0.2 – 1 FS5 / FS10 1 5P up to 15 1) In India region only 14 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 R-HA25-347 eps of conformity. Window-type current transformer up to 1600 A–2500 A Components Voltage transformers Voltage transformers Features • Inductive principle according to IEC 61869-3, VDE 0414-9-3 – Cast-resin insulated, single-pole – Insulation class E – Secondary connection by means of screw-type terminals – With earth-fault winding – Secondary multiratio possible • Fixed-mounted block-type design with and without primary R-HG24-057 tif – Option: fuses in connection compartment • Withdrawable gun-type design with primary fuses in Voltage transformer, fixed-mounted connection compartment Electrical data for voltage transformers up to 36 kV up to 120 V or up to 120 V / √3 0.2 / 0.5 / 1.0 up to 100 VA Voltage transformer, withdrawable with primary fuses R-HA2572-004 jpg Primary operating voltage Secondary operating voltage Accuracy classes Rating R-HA25-357 eps • Withdrawable PT truck in switching-device compartment. Withdrawable PT truck Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 15 Components Low-voltage compartment Low-voltage compartment Features • Low-voltage compartment for accommodation of all protection, control, measuring and metering equipment • Partitioned safe-to-touch off the high-voltage part • Low-voltage compartment can be removed, as all bus wires and control cables are plugged in • Option: Higher low-voltage compartment • Low-voltage cables are flexible and protected by metallic covers • Connection between switching-device truck and panel wiring into low-voltage compartment via 64-pole plug Door of low-voltage compartment (example) connectors • Bus wires are pluggable from panel to panel. Low-voltage compartment with built-in equipment (example) 16 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Components Digitalization – Arc flash protection Digitalization – Arc flash protection Energy (I²t - kA²s) Description Cable catches fire • Reduction of the fault times by rapid interruption of the Copper catches fire fault current Steel catches fire • Less than 100 ms in the event of an internal arc fault Benefits • Significantly reduces the gas discharge by shortening the effective arc duration • Prevents thermal, contaminating and toxic effects on the environment resulting from switchgear damage due to an internal arc • Minimizes switchgear downtimes and reduces economic 0 50 100 150 200 250 Time (ms) Damage caused by arc energy losses. Components • Photodetector as sensor • Fiber-optic cable as connection between sensors and arc flash protection relay • Arc flash protection relay for signal processing, logic opera- tion of signals, and tripping of circuit‑breaker. Sensors • NXAIR H is optionally equipped with light sensitive point sensors for immediate detection of an internal arc • Sensors are mounted in all primary compartments of a panel. Mounting position of optical arc sensors in low-voltage compartment A B C D E Switching-device compartment Busbar compartment Connection compartment Vacuum circuit-breaker truck Low-voltage compartment ptical point sensor with O fiber-optic cable Plug-in module with optical point sensor Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 17 Technical data Electrical data Electrical data Rated values Rated voltage UrkV 36 Rated frequency fr Hz Rated short-duration power-frequency withstand voltage Ud kV (phase-to-phase, phase-to-earth) Rated lightning impulse withstand voltage UpkV (phase-to-phase, phase-to-earth) Rated short-circuit breaking current Isc max. 50 / 60 70 170 25 26.3 1) 31.5 1) 31.5 Rated short-time withstand current Ik, 3 s max. 25 26.3 Rated short-circuit making current Ima (50 Hz) max. 63 63 80 Rated short-circuit making current Ima (60 Hz) max. 65 – 82 Rated peak withstand current Ip (50 Hz) max. 63 63 80 Rated peak withstand current Ip (60 Hz) max. 65 – 82 of busbar max. A 2500 of feeders with circuit‑breakers max. A of bus sectionalizer max. A 2500 2500 R-HA2572-007 tif Rated continuous current Ir 2) 1) In India region only 2)The rated continuous currents apply to ambient air temperatures of max. 40 °C. The 24-hour mean value is max. 35 °C (according to IEC 62271-1) 18 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Technical data Dimensions Dimensions With pressure relief duct with exhaust Without pressure relief duct Dimensions Width W Height ­ (con­sidering low‑voltage ­compartment height: 1000 mm) Height without pressure relief duct H1 Circuit‑breaker panel Metering panel Bus sectionalizer Standard panel non-ventilated / ­natural ventilated / forced ventilation H2 Standard panel non-ventilated for IAC A FLR 26.3 kA 0.1 s 1) 2700 mm H3 Standard panel non-ventilated for IAC A FLR 26.3 kA 0.1 s 1) 2250 mm D1 D2 Free-standing and ­wall-standing, for IAC A FLR ≤ 31.5 kA 1.0 s Free-standing and ­wall-standing, for IAC A FLR 26.3 kA 0.1 s 1) Depth 2) 1000 mm 1000 mm 2 × 1000 mm 3290 mm 2690 mm 2320 mm 1) In India region only 2)Depth depending on panel rating, number of cables, and built-in components in connection compartment Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 19 Technical data Room planning Room planning Pressure relief into the switchgear room Through pressure relief duct with exhaust Without p ­ ressure relief duct Type of pressure relief Ceiling height H at Rated voltage ≤ 31.5 kA IAC 1.0 s ≥ 3600 mm – Pressure relief into the switchgear room through pressure relief duct with exhaust Pressure relief into the switchgear room without pressure relief duct with low-voltage compartment of 1000 mm Type of installation 26.3 kA IAC 0.1 s 1) – ≥ 3300 mm Plan view (wall-standing arrangement) Plan view (free-standing arrangement) Dimensions of switchgear room All dimensions are in mm Rated voltage Wall-standing E* Free-standing E* Free-standing ≤ 31.5 kA IAC 1.0 s ≥ 150 ≥ 800 1) ≥ 2000 26.3 kA IAC 0.1 s 3) – ≥ 800 1) ≥ 2000 F* G* G* ≥ 200 2) ≥ 1800 ≥ 3000 ≥ 800 ≥ 1800 ≥ 3000 Distances Control aisle Rear wall distance, cable connection from front Rear wall distance, cable connection from rear-bottom or from front Rear wall distance for withdrawable part accessible from rear with cable connection from rear-bottom Lateral wall distance For replacement of switching devices For panel replacement 1) Rear wall distances ≥ 500 mm for installation and maintenance acc. to IEC 61936-1 ≥ 800 mm aisle for operation acc. to IEC 62271-200 20 2) Distance of ≥ 1000 mm is required in case of withdrawable part accessible from rear 3) In India region only Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Technical data Circuit‑breaker panel Metering panel Product range Current transformer Voltage transformer Withdrawable circuit‑breaker and / or and / or Withdrawable voltage transformers with primary fuses and / or and / or and / or Make-proof earthing switch Voltage detecting system and / or and / or Cable connection Surge arrester CBCT Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 21 Technical data Product range Current transformer Bus sectionalizer Voltage transformer Withdrawable circuit‑breaker Withdrawable voltage transformers with primary fuses 22 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Standards Standards, specifications, guidelines Type of service location Table for dielectric strength The switchgear can be used as indoor installation Rated voltage (r.m.s. value) kV 36 AC 1 kV) and VDE 0101: Rated short-duration power-frequency withstand voltage (r.m.s. value) – Between phases and to earth kV 70 • Outside lockable electrical service locations at places which Rated lightning impulse withstand voltage (peak value) according to IEC 61936 (Power Installations exceeding are not accessible to the public. Enclosures of switchgear – Between phases and to earth kV 170 can only be removed with tools • In lockable electrical service locations. A lockable electrical service location is a place outdoors or indoors that is reserved exclusively for housing electrical equipment and which is kept under lock and key. Access is restricted to authorized personnel and persons who have been properly instructed in electrical engineering. Untrained or unskilled persons may only enter under the supervision of autho- Dielectric strength • The dielectric strength is verified by testing the switchgear with rated values of short-duration power-frequency ­withstand voltage and lightning impulse withstand voltage according to IEC 62271-1/VDE 0671-1 (see “Table for dielectric strength”). rized personnel or properly instructed persons. • The rated values are referred to sea level and to normal atmospheric conditions (1013 hPa, 20 °C, 11 g/m³ humidity Altitude correction factor Ka in accordance with IEC 60071 and VDE 0111). Altitude correction factor HA40-2037b en eps • The dielectric strength decreases with increasing altitude. For site altitudes above 1000 m, the altitude ­correction factor Ka is recommended, depending on the actual site altitude above sea level. For site altitudes above 1000 m (above sea level), the standards do not provide any guidelines for the insulation rating. Instead, special regulations apply to these altitudes. • Site altitude – The dielectric strength of air insulation decreases with increasing altitude due to low air density. This reduction is permitted up to a site altitude of 1000 m according to IEC and VDE. – For site altitudes above 1000 m, a higher insulation level Site altitude in m above sea level must be selected. It results from the multiplication of the Rated short-duration power-frequency withstand voltage to be selected for site altitudes > 1000 m rated insulation level for 0 to 1000 m with the altitude correction factor Ka. ≥ Rated short-duration power-frequency withstand voltage up to ≤ 1000 m · Ka Rated lightning impulse withstand voltage to be selected for site altitudes > 1000 m ≥ Rated lightning impulse withstand voltage up to ≤ 1000 m · Ka Example: 3000 m site altitude above sea level, 24 kV switchgear rated voltage, 125 kV rated lightning impulse withstand voltage Rated lightning impulse withstand voltage to be selected 125 kV · 1.28 = 160 kV Result: According to the above table, switchgear for a rated voltage of 36 kV with a rated lightning impulse withstand voltage of 170 kV is to be selected. Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 23 Standards Standards, specifications, guidelines Overview of standards (October 2022) IEC standard VDE standard EN standard IEC 62271-1 VDE 0671-1 EN 62271-1 IEC 62271-200 VDE 0671-200 EN 62271-200 IEC 62271-100 VDE 0671-100 EN 62271-100 Disconnectors and earthing switches IEC 62271-102 VDE 0671-102 EN 62271-102 HV HRC fuses IEC 60282-1 VDE 0670-4 EN 60282-1 Voltage detecting systems IEC 62271-213 VDE 0671-213 EN 62271-213 IP code IEC 60529 VDE 0470-1 EN 60529 Switchgear NXAIR H Devices Circuit‑breakers Degree of protection IK code IEC 62262 VDE 0470-100 EN 50102 Insulation – IEC 60071 VDE 0111 EN 60071 Instrument transformers – IEC 61869-1 VDE 0414-9-1 EN 61869-1 Current transformers IEC 61869-2 VDE 0414-9-2 EN 61869-2 Voltage transformers IEC 61869-3 VDE 0414-9-3 EN 61869-3 – IEC 61936-1 VDE 0101-1 EN 61936-1 Installation, erection Standards Internal arc classifications The switchgear complies with the relevant standards and • Protection of operating personnel by means of tests for specifications applicable at the time of type tests. In accordance with the harmonization agreement reached by the countries of the European Union, their national ­specifications conform to the IEC standard. Current-carrying capacity VDE 0671-1, the rated continuous current refers to the following ambient air temperatures: + 35 °C – Maximum+ 40 °C • The current-carrying capacity of the panels and busbars depends on the ambient air temperature outside the ­enclosure. IEC 62271-200 or VDE 0671-200 • The switchgear complies with criteria 1 to 5 specified in the mentioned standards for the basic version for 26.3 kA / 0.1 s 1) and 31.5 kA / 1.0 s • According to IEC 62271-200 or IEC 62271-1, VDE 0671-200 or – Maximum of 24-hour mean verifying the internal arc classification • Internal arcing tests must be performed in accordance with • Definition of criteria: – Criterion 1: Correctly secured doors and covers do not open, limited deformations are accepted – Criterion 2: No fragmentation of the enclosure, no projection of small parts above 60 g – Criterion 3: No holes in accessible sides up to a height of 2 m – Criterion 4: No ignition of indicators due to hot gases – Criterion 5: The enclosure remains connected to its earthing point • NXAIR H complies with the internal arc classification IAC A FLR for 26.3 kA / 0.1 s 1) and 31.5 kA / 1.0 s, providing for maximum personal safety. 1) In India region only 24 Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 Standards Standards, specifications, guidelines Climate and ambient conditions Protection against solid foreign objects, electric shock, The NXAIR H switchgear is suitable for application in indoor and water installations under normal operating conditions as defined in NXAIR H switchgear fulfills according to the standards the standard IEC 62271-1. • Operating temperature range • Rel. air humidity −5 °C to +55 °C (for primary part) 1) • Mean value over 24 h : ≤ 95 % IEC 62271-1 VDE 0671-1, EN 62 271-1 IEC 62271-200 VDE 0671-200, EN 62 271-200 IEC 60529 VDE 0470-1, EN 60 529 IEC 62262 VDE 0470-100, EN 50 102 • Mean value over 1 month: ≤ 90 % • Condensation • Occasionally the following degrees of protection: • Frequently (degree of protection min. IP4X, with anti-condensation heater 2) ) • Site altitude • Observe altitude correction (see page 23) • No significant pollution of the ambient air (dust, gases, vapors, salts). Switchgear panel NXAIR H Degree of protection for the enclosure, optionally Degree of protection for the enclosure, with ventilation Degree of protection for the partitions IP4X Degree of protection for the ­enclosure against mechanical impacts from outside IK07 IP4X IP2X Recycling For secondary devices in the low-voltage door, the The switchgear can be recycled in ecological manner in ­stipulations of the IP degree of protection apply according to compliance with existing legislation. Auxiliary devices such the definitions for the switchgear enclosure. as short-circuit indicators have to be recycled as electronic scrap. Batteries have to be recycled professionally. Color of the panel front RAL 7035 (light gray). Terms “Make-proof earthing switches” are earthing switches with short-circuit making capacity according to – IEC 62271-102 and – VDE 0671-102 / EN 62271‑102. 1) S econdary devices (e.g. protection devices, meters, measuring transducers, etc.) must be suitable for the given operating conditions 2) Heater is optionally available in the low-voltage compartment, switching-device compartment, and connection compartment Circuit-Breaker Switchgear Type NXAIR H up to 36 kV, 31.5 kA, Air-Insulated · Siemens HA 25.72 · 2022 25 Published by Siemens AG Smart Infrastructure Electrification & Automation Mozartstraße 31 C 91052 Erlangen, Germany For further information, please contact our Customer Support Center: Phone +49 180 524 70 00 Fax +49 180 524 24 71 support.energy@siemens.com siemens.com/medium-voltage-switchgear siemens.com/nxair Article No. SIEA-C10026-00-7600 Smart Infrastructure combines the real and digital worlds across energy systems, buildings and industries, enhancing the way people live and work and significantly improving efficiency and sustainability. We work together with customers and partners to create an ecosystem that both intuitively responds to the needs of people and helps customers achieve their business goals. It helps our customers to thrive, communities to progress and supports sustainable development to protect our planet for the next generation. siemens.com/smart-infrastructure Medium-­ voltage systems Status 12/2022 Subject to changes and errors. The information given in this document only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modification in the course of further development of the products. The requested performance features are binding only when they are expressly agreed upon in the concluded contract. © Siemens 2022
