Page 1 Medium-Voltage Switchgear Air-Insulated Switchgear NXAIR ≤ 17.5 kV / ≤ 40 kA / ≤ 4000 A Busbar Current INSTALLATION INSTRUCTIONS Order No.: 110-0084.9 Issue: December 2020 Revision: © Siemens AG 2020. All rights reserved.
Page 2 For details about technical design and equipment sufficiently by these instructions, the matter should like e.g. technical data, secondary equipment, circuit be referred to the competent Siemens department. diagrams, please refer to the order documents. The contents of this instruction manual shall not...
Page 3: Safety Instructions
INFORMATION Provides additional information to clarify or simplify a procedure. Observe the information. Operation symbol: Asks the operator to perform an operation. ✓ Result symbol: Identifies the result of an operation. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 4: Table Of Contents
Preparations before accessing the connection compartment ..............115 Accessing the connection compartment through the switching-device compartment ......119 Accessing the connection compartment through the switching-device compartment at panel versions with ventilation system type I ........................124 ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 5 Drying dampness ..........................207 14.4 Instructing the operating personnel..................... 207 14.5 Checking the accessories ........................207 14.6 Checking the interlocks mechanically ....................207 14.7 Test operation ........................... 208 14.8 Switching on operational high voltage....................209 ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 6 Replacement of panels and components .....................212 16.4 Disposal .............................212 17 Installation report..........................213 18 Index ..............................220 Document information: Title: Installation Instructions Order number: 110-0084.9 Additional order number: 8BX3300-0LA00-0AA1 Revision: Issue: December 2020 ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 7: General Instruction
• Settings were not made in accordance with Siemens specifications. • After installation and setting, no final check was performed by a service technician approved by Siemens, including documentation of the test results. • Maintenance was not done according to the Installation Instructions of the Siemens products.
Page 8: Personal Protective Equipment (Ppe)
Access to such a room is restricted to skilled electricians. In the basic version, the degree of protection of the enclosure of NXAIR medium-voltage switchgear is IP3XD according to IEC 60529.
Page 9: Qualified Personnel
To get appropriate qualifications about transport, installation and commissioning, this personnel must have taken part in a training for assembly and installation of air- insulated medium-voltage switchgear type NXAIR. This installation training provides detailed information about design, operation, installation and trouble shooting on the primary part of NXAIR switchgear.
Page 10: Preparing Installation
Read and understand these instructions before attempting installation works. Preliminary clarifications In order to load the transport units in a suitable installation order, the regional Siemens representative requires the following information from you several weeks before delivering the switchgear: •...
Page 11 Fig. 2: Measuring sheet for the foundation. Tolerance according to DIN 43661: Straightness 1 mm/1 m length, 2 mm for the total length; evenness 1 mm within 1 m measured length; ≤ 31.5 kA and busbar version up to 2500 A NXAIR version with I ≤ 110-0084.9 / 15 NXAIR /...
Page 12: Dimensions Of The Switchgear Room
1 mm within 1 m measured length; ≤ 31.5 kA and busbar version up to 3150/4000 A NXAIR version with I and NXAIR version with I = 40 kA (with or without contactor panels) Measuring point on the foundation rails...
Page 13: Switchgear With Absorber
For connection from the rear: ≥ 500 mm; also valid with rear connection duct For contactor panel with panel width 435 mm: ≥ 100 mm For a panel depth of 1540 mm: ≥ 110 mm For further information, see information drawings NXAIR, order number 110-2300.9. ≤ 110-0084.9 / 15...
Page 14: Switchgear With Evacuation Ducts
For a panel depth of 1540 mm: ≥ 110 mm For further information, see information drawings NXAIR, order number 110-2300.9. All parts of the evacuation duct are included in the scope of supply of the switchgear. The parts of the evacuation duct are made of galvanized sheet steel, thickness 2 mm, with bolted joints M8-8.8.
Page 15: Intermediate Storage
If the delivered panels or parts thereof have to be stored before installation, a suitable storage room or place has to be selected and prepared. No condensation shall be possible in a suitable storage room; if necessary, air conditioning or heating systems should be installed to avoid condensation. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 16: Intermediate Storage Of The Transport Units
Place all crates on planks and square timber for protection against floor humidity • After 6 months of storage, have the desiccant agent regenerated professionally. To do this, ask for expert personnel via the regional Siemens representative. Accessories The following accessories are available: •...
Page 17: Tools
Vernier caliper • Measuring instrument with test probes, measuring cables, clamp-type test probes • Continuity tester (beeper) • Site illumination • Hand lamp • Pocket lamp • Vacuum cleaner • Hammer drill ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 18: Comments On Electromagnetic Compatibility
Always keep the connecting leads of the shields as short as possible (< 10 cm). If shields are used as protective earth conductors at the same time, the connected plastic-insulated lead must be marked green/yellow over its entire length. Non-insulated connections are inadmissible. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 19: Installation And Fixing Material Without Additional Earthquake Stabilization
Washer ISO 7094 - 16 - 100 HV (10) head bolt and washer: FAN 12/10 Hexagon nut ISO 4032 – M16 – 8 Base frame of panel (11) Floor finish ── ── Min. 50 mm ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 20 FAN 12/10 Floor fixing plate (holder for profiles at a distance ≥ 1200 mm), Fig. 10 "Side view of the fixing (11) Floor finish plate" ── ── Min. 55 mm ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 21 Floor plate (approx. 36 mm thick) Floor fixing plate NOTICE Damages due to corrosion Welded seams are susceptible to corrosion. After welding, protect the welded seams professionally against corrosion. Fig. 10: Side view of the fixing plate ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 22: Installation And Fixing Material With Additional Earthquake Stabilization
The number and arrangement of the necessary foundation rails of the base frame are illustrated in detail in a dimension drawing. For further information, see information drawings NXAIR, order number 110-2300.9. 5.13 Installation and fixing material with additional earthquake stabilization Before installing the individual components, the installation and fixing material required has to be prepared.
Page 23 (11) Floor finish fixing plate" ── ── Min. 55 mm Floor fixing plate NOTICE Damages due to corrosion Welded seams are susceptible to corrosion. After welding, protect the welded seams professionally against corrosion. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 24 ── 80 plus/minus 1.5 mm The number and arrangement of the necessary foundation rails of the base frame are illustrated in detail in a dimension drawing. For further information, see information drawings NXAIR, order number 110-2300.9. ≤ NXAIR / 40 kA...
Page 25: Drilling Template For Additional Earthquake Stabilization
Do not align the drilling template via another drilling template or other markings. For information about the assembly of the drilling template for the respective panel and the drillings to the performed, see information drawings NXAIR, order number 110-2300.9. Overview of drilling template Fig.
Page 26 Provide markings according to the panel version (2). Remove the drilling template. Perform drillings according to the markings. Clean the working area. ✓ The panel can now be exactly positioned and bolted together. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 27: Unloading And Erection
Secure the transport units against tipping. Move the transport units slowly and carefully. Do not move transport units with bodily power. Do not climb onto the roof of the panels. Put on personal protective equipment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 28: Checking For Completeness And Transport Damage
Repair transport damage or have it repaired, otherwise you may not start installation. Check whether the delivery is complete using the delivery notes and packing lists. If the delivery is incomplete, inform the regional Siemens representative. Re-pack the switchgear as far as possible and reasonable. Do not remove the PE foil until reaching the place of installation in order to keep the switchgear as clean as possible.
Page 29: Center Of Gravity Of The Panel
Fig. 21: Position of the center of gravity, for example for a circuit-breaker panel width of 800 mm 390 mm 145 mm 560 mm Fig. 22: Position of the center of gravity, for example for a contactor panel width of 435 mm ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 30: Transport Weights And Dimensions Without Packing
Transport weights and dimensions without packing Short-time Busbar Feeder Panel Panel Panel Weight current version current width depth height approx. Panel type NXAIR (without rear duct) [kA] [mm] [mm] [mm] [kg] 600/1000 Circuit-breaker panel Circuit-breaker panel 1000/ 1250/ 1170 Disconnecting panel 1250/...
Page 31: Transport To The Place Of Installation (Switchgear Room)
Rear duct with cables 1000 For further information, see information drawings NXAIR, order number 110-2300.9. Transport to the place of installation (switchgear room) There are a number of methods that can be used in handling the transport units. The handling method used will be determined by conditions and available equipment at the installation site.
Page 32 Fig. 24: Contactor panel with panel width 435 mm Bolted joints of the angle brackets Bolted joints of the transport retainers Left-hand transport retainer (also available on the right as a mirror image) ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 33: Applying The Lifting Tool At The Panel
Leave an appropriate distance to the inner edge of the door (arrow) on the side with the high-voltage door when doing so. Fig. 25: Permissible application on the Fig. 26: Permissible application on the right below the switchgear frame left below the switchgear frame ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 34: Mounting The Craning Angles
Craning angle at the side of the panel: 3 bolted joints M8x20. Craning angle at the rear of the panel: 2 bolted joints M8x20. Observe the information drawings NXAIR, order number 110-2300.9. INFORMATION The craning angles allow the use of crane rods as well as the attachment of crane hooks to transport the panels without wooden pallet.
Page 35 4 craning angles with 3 bolted joints M8x20 each 3 craning angles with 3 or 2 bolted joints M8x20 each Fig. 31: Example for a panel with rear duct: 4 craning angles with 3 or 2 bolted joints M8x20 each ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 36 According to the panel version, select the suitable craning angles from the set (see preceding illustrations or also information drawings NXAIR, order number 110-2300.9). Bolt each craning angle with 2 or 3 bolts M8x20 onto the panel at the corresponding position.
Page 37: Lifting With Crane Rods
Crane rods are non-fixed load lifting attachments according to EN 13155. Observe the requirements and instructions from EN 13155. Use exclusively crane rods complying with the specification of these instructions. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 38 1950, 2100, With 1600 > 300 2140, 2250 1950, 2100 1200 ── 1950, 2100 1600 With Without 1950, 2100, 1000 1600 2140, 2250 1400, 1500 1200 1900 ── ── 1400, 1500 With 1200 ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 39 Depending on the panel version, the crane rods are attached differently. The following examples show the basic attachment of the crane rods. For further information, see information drawings NXAIR, order number 110-2300.9. Fig. 35: Crane rods at the front and rear Fig.
Page 40 (1) Clearance between crane rod and crane hook: > 2000 mm (2) Protrusion A: > 300 mm Fig. 39: Distances for craning ✓ The panel is prepared for craning with crane rods. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 41: Lifting By Means Of Chains And Crane Hooks
Fig. 40: Transport unit suspended from a crane cross-member ✓ The panel is prepared for craning with chains and crane hooks. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 42 Connection holes at the corresponding position of the panel (2) must be sealed with SIKAFLEX 221-GR 310 ML compound to achieve the degree of protection of the switchgear. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 43: Further Transport Without Wooden Pallets
Distribute the roller pads so as to support the outer edges of the transport unit. Lift one side, then the other side of the transport unit and slowly lower it on the place of installation. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 44 Place the securing straps in position and tighten them. The securing strap, which has to be fastened correctly on both sides, is an additional absolute necessity. Move the hydraulic lifter with the panel slowly and carefully. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 45 Unloading and erection Fig. 43: The panel placed on hydraulic lifter Fig. 44: Permissible application on the switchgear frame ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 46: Installing The Transport Units
The dimension drawing containing all relevant dimensions of the foundation cutouts for different panel versions is not part of these instructions. For further information, see information drawings NXAIR, order number 110-2300.9. 6.15 Transport protection at the service truck In order to prevent transport damages, the service truck is equipped at the factory with a plate for transport protection.
Page 47: Assembling The Panels
Control tightening torques The following tightening torques apply when checking bolted joints. Bolted joint Tightening torque 25 Nm 60 Nm 90 Nm Specific tightening torques are stated separately in the respective assembly operation. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 48: Interconnecting The Panels, Preparation
Detach the busbars (1) and store the busbars related to the panel type for later use Dispose of strip fasteners, transport retainer and bolts correctly. ✓ The busbars are ready for use. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 49: Aligning The Panels
Lay thin shims with 0.5 mm to 1.0 mm thickness under the panel frame, if required. Place the next panel at a distance of approximately 300 mm beside the first panel. ✓ The first panel is aligned. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 50: Fastening The Panels To The Foundation
Compensate gaps up to 2.5 mm with sealing compound, e.g. SIKAFLEX 221-GR 310 ML. In case of gaps > 2.5 mm, inform the regional Siemens representative. NOTICE Cleaning Possible malfunctioning and damage to the panels caused by pollution.
Page 51 Remove the bottom part from the front of the ventilation duct, and store it. Fig. 48: Bottom part, Fig. 49: Front floor opening in panel frame removed ✓ Additional preparations on the panel with ventilation duct are completed. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 52 Record the proper condition of the area after bolting together, so that this is clear without any doubt before commissioning the switchgear. Refasten the previously removed bottom part at the front of the ventilation duct. ✓ The panel is fastened to the foundation. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 53: Assembling The Busbars
Observe the inserting direction of the bolts (see the drawings below). The threads of the bolts and nuts must be dry and non-greasy. After removing the connecting elements, the packing materials of the bag unit must be disposed of in an environmentally compatible way. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 54: Accessing The Busbar Compartment
Put on personal protective equipment (e.g. cut-resistant gloves and arm sleeves). When working inside the switchgear, it must be observed that cables do not touch any sharp-edged sheets. Cover sharp-edged spots, if required. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 55 Accessing the busbar compartment through the front INFORMATION Read and understand these instructions before attempting installation works. HINT Accessing the busbar compartment through the front is not available with the contactor panel with panel width 435 mm. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 56 To access the busbar compartment through the front side of the panel, open the high-voltage door and access the switching-device compartment first. For accessing the switching-device compartment, see chapter 8.1. • Busbar compartment is accessible through switching-device compartment. Fig. 52: Accessing the busbar compartment: Switching-device compartment accessible ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 57 11 nuts M8 with contact washers (2) Remove the busbar cover (1). To do this, lift the busbar cover by the handle, and pull it out. Store the busbar cover. Fig. 54: Removing the busbar cover ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 58 Busbar compartment is accessible through switching-device compartment. Fig. 56: Panel prepared for accessing the busbar compartment Remove the connecting elements from the busbar cover (1), and store them: • 3 bolts M8x20 with contact washers (2) ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 59 Assembling the panels Busbar cover Connecting elements Fig. 57: View of switching-device compartment from inside ✓ Access to the busbar compartment through the front side of the switch-disconnector panel is given. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 60 An individual bag with connecting elements for connection of the busbars with the feeders is attached to each busbar compartment. ≤ 12 kV Busbar version NXAIR for U INFORMATION Number of connecting elements in end panel: The connections between busbars and feeder bars in the end panel are to be executed with 4 connecting elements on each phase.
Page 61 Fig. 61: Side view of 2000 A / 2500 A busbar assembly, feeder ≤ 1250 A, U ≤ 12 kV, I ≤ 31.5 kA or feeder ≤ 2500 A, I ≤ 40 kA with forced ventilation ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 62 Fig. 62: Assembly of 2500 A busbar, feeder 1600 A – 2500 A, U ≤ 12 kV Fig. 63: Side view of 2500 A busbar assembly, feeder 1600 A – 2500 A, U ≤ 12 kV ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 63 Fig. 64: Assembly of 3150 A / 4000 A busbar, feeder ≤ 1250 A, U ≤ 12 kV Fig. 65: Side view of 3150 A / 4000 A busbar assembly, feeder ≤ 1250 A, Ur ≤ 12 kV ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 64 Fig. 67: Side view of 3150 A / 4000 A busbar assembly, ≤ 12 kV, I ≤ 31.5 kA or feeder 2500 A, U ≤ 40 kA with forced ventilation feeder 2500 A, I ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 65 ≤ 12 kV feeder 3150 A / 4000 A, U Fig. 69: Side view of 3150 A / 4000 A busbar assembly, ≤ 12 kV feeder 3150 A / 4000 A, U ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 66 Detach the connecting elements (2) from feeder bars. Store disassembled connecting elements (2) carefully and keep them ready for later reuse. Dispose of strip fasteners correctly. Fig. 70: As-delivered condition of the feeder bars with conical spring washers ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 67 Fig. 72: Detail view of the feeder bar connection (L3 phase as an example) Arrowhead indicates the inserting direction of the bolts Fig. 73: Side view of 1250 A busbar assembly, feeder 400 A ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 68 Fig. 75: Detail view of the feeder bar connection (L3 phase as an example) Arrowhead indicates the inserting direction of the bolts Fig. 76: Side view of 2500 A busbar assembly, feeder 400 A ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 69 Bag with connecting elements: 110-2807.3 Fig. 77: Assembly of 3150 A / 4000 A busbar, feeder 400 A Fig. 78: Detail view of the feeder bar connection (L3 phase as an example) ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 70 Feeder bar, phase L2 Busbar, phase L2 Fig. 80: Busbar current metering panel : Fig. 81: Details; the arrowhead indicates the inserting direction of the bolt Busbar assembly phase L2 (for example, 2500 A busbar) ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 71 M12x40, conical spring washer Nut, conical spring washer Copper spacer with three holes Copper spacer with four holes Bag with connecting elements: 110-0770.3 Fig. 82: Assembly of 1250 A busbar, feeder 1250A ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 72 Fig. 83: Detail view of the feeder bar connection (L1 phase as an example) Arrowhead indicates the inserting direction of the bolts Fig. 84: Side view of 1250 A busbar assembly, feeder 1250A ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 73 Copper spacer with four holes Bag with connecting elements: 110-0771.3 Fig. 85: Assembly of 2500 A busbar, feeder 1250A Fig. 86: Detail view of the feeder bar connection (L1 phase as an example) ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 74 Nut, conical spring washer Copper spacer with five holes Copper spacer with six holes Bag with connecting elements: 119-2365.3 Fig. 88: Assembly of 3150 A / 4000 A busbar, feeder 1250A ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 75 Fig. 89: Detail view of the feeder bar connection (L1 phase as an example) Arrowhead indicates the inserting direction of the bolt Fig. 90: Side view of 3150 A / 4000 A busbar assembly, feeder 1250A ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 76 If required adjust this distance to min 0.1 mm Fig. 91: Minimum distance between the main contact blade (closed position) and the edges of the notch ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 77 Assembling the panels Busbar version NXAIR for U = 1 7 . 5 kV For panel versions with a rated voltage of U = 17.5 kV, insulating shells cover the joints of the busbar with the feeder bars. ≤ 12 kV (described above). Finally, The busbars are assembled like in panel versions with a rated voltage of U the insulating shells are mounted additionally.
Page 78 Finally insert a plastic tube (1) on each horizontal bar of busbar system. Consider the panel width and numbers of bars in the busbar system while fitting the plastic tubes. Fig. 94: Detail view of busbar system with plastic tubes; right end panel as an example ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 79 The insulating half-shells have a different shape for the locking labyrinth on the corners. Press the insulating half-shells onto each other to interlock them together. Attach the insulating shells in pairs at the bolted joint and fasten with the strip fastener. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 80: Closing The Busbar Compartment
Possible malfunctioning and damage to the panels caused by foreign objects. Before closing the busbar compartment, remove all foreign objects, e.g.: • Tools • Unused installation material • Packing material • Cleaning material ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 81 The busbars must absolutely be mounted from the side of the panel before mounting the transverse partition. Panel depth [mm] Transverse partition 1350 Optional 1400/1500/1540/1650 Compulsory ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 82 2 hexagon head bolts size M8x20 and plain washers size 8.4 mm (1) and at the lower edge using hexagon socket head bolt size 6 (3). ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 83 2 bolts M8x20 with contact washers (3) Fig. 98: Mounting the transverse partition plate Fig. 99: Mounting the transverse partition plate from the left on the switch-disconnector from the right on the switch- panel disconnector panel ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 84 To fix the busbar cover (1), tighten the nuts all around hand-tight: • 11 nuts M8 with contact washers (2) Tighten the fixing nuts all around with a tightening torque of 25 Nm. Fig. 100:11 bolted joints on busbar cover ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 85 3 bolts M8x20 with contact washers (2) Tighten the fixing bolts all around with a tightening torque of 25 Nm. Busbar cover Connecting elements Fig. 102: 3 bolted joints on the busbar cover ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 86: Bolting Panels Together
INFORMATION Mounting the transverse partition plate on contactor panels with panel width 435 mm: Approach the adjacent panel first, then fasten the transverse partition plate. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 87 Fig. 105: Connecting element for lining up a contactor panel Fig. 104: Aligning the panel with panel width 435 mm with a panel featuring a panel width ≥ 600 mm ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 88 Foreign objects Possible malfunctioning and switchgear damage caused by foreign objects. Remove all foreign objects from the switching-device compartment, e.g.: • Tools • Unused installation material • Packing material • Cleaning material ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 89 Take 7 bolts M8x25 (hexagon head bolt with contact washer) and 7 plain washers size 8 according to ISO 7093 from the bag unit supplied, and screw them from the left inner side of the switching-device compartment into the adjacent switching-device compartment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 90 Insert upper and lower wiring duct cover on the left inner side of the switching-device compartment and fix each cover with 2 bolts M8x20 (hexagon head bolt with contact washer). Fig. 109: Fastening the wiring duct covers ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 91 14 bolts M8x20, contact washers and nuts. Fig. 110: Bolted joints inside the PRC Bolt two panels together in the upper area of the PRC, using 8 bolts M8x20, contact washers and nuts. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 92 Fig. 111: Bolted joints in the upper area of the PRC Installation of deflector plates For further information, see information drawings NXAIR, order number 110-2300.9. Bolting the low-voltage compartment together Bolt 2 panels each together at the side of the low-voltage compartment using bolts M8x20, contact washers and nuts.
Page 93 For further information, see information drawings NXAIR, order number 110-2300.9. Assembling the busbars in the end panel The installation of the busbar in the end panel cannot be done from the side. In the upper area of the busbar compartment, several parts as well as bolts, nuts and washers must be removed.
Page 94 Bolt or weld the end panel onto the foundation rails without distortions. Assemble the busbars and the transverse partition plate in / at the busbar compartment in the adjacent panel. Install and connect all removed parts in reverse order. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 95 Assembling the panels Fig. 115: PRC without additional components Fig. 116: PRC with natural ventilation Fig. 117: PRC with fan installation Fig. 118: PRC with e.g. busbar earthing switch installation ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 96 The front defector plates (1) of the absorber system must be mounted in the rear area (area with rear wall) of the absorber system. Check the position of the deflector plates of the absorber system. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 97 (area with rear wall) of the absorber system. The lateral deflector plate (2; 3) must be mounted pointing to the center of the switchgear row. Check the position of the deflector plates of the absorber system. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 98 The upper metal grids (4) of the ventilation system in the PRC must not be damaged, i.e. there must be neither cracks nor holes. Check the metal grids of the ventilation system. Fig. 125: View onto the ventilation system in the pressure relief duct ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 99: Interconnecting The Earthing Busbar
Undo the bolted joint of the link in the connection compartment of the adjacent panel, and screw it in again with bolt size M12 as connecting element of the earthing busbar with the adjacent panel. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 100: Earthing The Switchgear
If the resistance from the earthing bar in the end panels to the substation earthing point is given with < 200 µΩ, there is no need for an additional earthing connection to the substation earth in every fifth panel. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 101: Installing The Fan For Forced Ventilation
7.12 Installing the fan for forced ventilation The fan is installed in a fan box at the factory and is delivered separately from the switchgear. Fig. 129: As-delivered condition of the fan box with installed fan ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 102 In the optional version of the forced ventilation with 2 fans, each of them in a fan box of its own, preparation and installation are done in parallel at the front in the pressure relief duct. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 103 Screw out 6 bolts M8x20. Fig. 131: Pressure relief duct for fan box Screw out 2 bolts M8x25 with associated plain washer. Remove the front cover. Fig. 132: Front cover at pressure relief duct ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 104 Disconnect the connection cables carefully. Check through the opening at the front of the fan box if the connection cables of the fan are connected. Disconnect the connection cables. Screw out 10 bolts M8x20. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 105 Fig. 135: Fan box connecting bolts (top) Remove the roof plate using the handles. Fig. 136: Fan box roof plate Store the roof plate with the fan and the connection cables correctly. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 106 Insert the fan box in the front area of the pressure relief duct. Fig. 137: Fan box position Bolt the fan box together with the pressure relief duct using 6 bolts M8x20. Wind vane Fig. 138: View from above into the fan box ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 107 Cable connection in the low-voltage compartment Push the connection cables of the low-voltage compartment into the grommet. Fig. 140: Connection cables Connect the connection cables according to the schematic diagram and the design option. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 108 Schematic diagram for installation of one fan, order number 110-7120.5 Fig. 141: Schematic diagram for installation of one fan Schematic diagram for installation of two fans, order number 110-7121.5 Fig. 142: Schematic diagram for installation of two fans ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 109 Record the proper condition of the inside area of the fan after bolting together, so that this is clear without any doubt before commissioning the switchgear. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 110 Checking smooth operation of the fan CAUTION Rotating fan blades Do not reach into the fan box if the voltage supply for the fan is switched Interrupt the voltage supply of the fan. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 111 After successful test of the fan blades, connect the cables to the terminals -X01/0 and -X01/1 in the low-voltage compartment. Fig. 145: Testing the fan blades Completing fan installation Fasten the cover using 2 bolt-and-washer-assemblies M8x20. Fig. 146: Assembling the cover ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 112 After 5 minutes of trouble-free rotation, interrupt the external voltage supply of the fan. Reconnect the connection cables to the wind vane and the fan in the low-voltage compartment. ✓ The fan installation and fan test is completed. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 113: Switchgear Protection Ip4X (Optional)
SIKAFLEX 221-GR 310 ML compound according to the information drawings before final assembly of the switchgear. SIKAFLEX 221-GR 310 ML is supplied with the accessories. For further information, see information drawings NXAIR, order number 110-2300.9. 7.14 Components without installation activity INFORMATION Systems assembled and tested at the factory are excluded from installation.
Page 114 • 1 connecting tube each between the overpressure monitor and the sensor Fig. 150: Overpressure monitors (3) and tubes (4) in the low-voltage compartment Fig. 151: Overpressure monitors (5) and tubes (4), for example in the switching-device compartment ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 115: Accessing The Connection Compartment Through The Front
If a withdrawable part / switching-device truck is inserted in the switching-device compartment: • High-voltage door closed • Withdrawable part / switching-device truck in test position • Feeder earthing switch in CLOSED position ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 116 Fig. 152: All panel versions except for contactor panels with panel width 435 mm and switch- disconnector panels: Position indicator of feeder earthing switch on high-voltage door Fig. 153: Contactor panels with panel width 435 mm only: Position indicator of feeder earthing switch on high-voltage door ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 117 Additional position indicator of feeder earthing switch in switching-device compartment Fig. 155: Contactor panels with panel width 435 mm only: Additional position indicator of the feeder earthing switch inside the switching-device compartment ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 118 Fig. 156: Switch-disconnector panel only: Position indicator of feeder earthing switch on high- voltage door Open the high-voltage door, see Operating Instructions with order number 110-0134.9. Fig. 157:Switch-disconnector panel only: Switching-device / connection compartment accessible ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 119: Accessing The Connection Compartment Through The Switching-Device Compartment
All panel versions except for contactor panels with panel width 435 mm and switch- disconnector panel: • 10 bolts M8x20 with contact washers and plain washers (4) • 5 bolts M8x20 with contact washers (5) Remove the partition (3), and store it. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 120 Remove the connecting elements (4) from the right part of the partition (3) to the connection compartment and store them: • 4 bolts M8x16 with contact washers (4) Remove the right part of the partition (3), and store it. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 121 The heater and its protective cover can be hot. Touching hot heater may cause burns. Put on personal protective equipment. Switch off the heater before touching the protective cover and let the hot heater cool down. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 122 Remove the connecting elements (8) from the right part of partition (7) to the connection compartment, and store them: • 4 bolts M8x16 with contact washers (8) Remove the right part of the partition (7), and store it. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 123 Accessing the connection compartment through the front Fig. 165: Left part of partition (5) Fig. 166: Right part of partition (7) Fig. 167: Partition removed ✓ Access to the connection compartment through the panel front is given. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 124: Accessing The Connection Compartment Through The Switching-Device Compartment At Panel Versions With Ventilation System Type I
Detach the holder of the air guide. To do this, loosen the lower bolt (2), and unscrew and store the upper bolt (1). Proceed in the same way on the other side. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 125 Unscrew the upper bolts from the partition, and store them. Fig. 172: 4 bolted joints on partition Unscrew the lateral bolts from the partition and the base frame, and store them. Proceed in the same way on the other side. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 126 Fig. 176: Ventilation duct removed Fig. 177: Switching-device compartment without ventilation duct Please observe during all other removal and installation work that the links on the panel base are not dented. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 127 Remove the connecting elements from the partition to the connection compartment (3), and store them: • 10 bolts M8x20 with contact washers and plain washers (4) • 5 bolts M8x20 with contact washers (5) Remove the partition (3), and store it. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 128 Accessing the connection compartment through the front Fig. 181: 15 bolted joints on partition If required, bend dented links back into the correct position. ✓ Access to the connection compartment through the panel front is given. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 129: Accessing The Connection Compartment Through The Switching-Device Compartment At Panel Versions With Ventilation System Type Ii
Loosening certain bolted joints could damage the ventilation duct. When disassembling the ventilation duct, proceed exactly as described hereafter. Do not loosen any bolted joints other than those described. Fig. 182: Bolted joints to be loosened ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 130 Fig. 184: Panel prepared Procedure Remove the connecting elements (2) from the protection plate (1), and store it: • 4 nuts M8 with contact washers Remove the protection plate (1), and store it. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 131 To get the front part of the ventilation duct over the door threshold, lift it approx. 2 cm. Pull it out of the panel, and store it. Fig. 188: Lifting and pulling the front part ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 132 To get the unit over the door threshold, lift it approx. 2 cm. Pull it out of the panel. Store the unit, but do not disassemble the unit any further. ✓ Access to the connection compartment through the panel front is given. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 133: Accessing The Connection Compartment Through The Switching-Device Compartment At Panel Versions With Voltage Transformer Compartment
Put on personal protective equipment. Preconditions • Preparations as described in chapter 8.1 completed • Door to voltage transformer compartment open • Removable voltage transformers removed from panel Fig. 191: Panel prepared ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 134 Remove the connecting elements from the top side of the labyrinth, and store them: • 11 bolts M8x16 with contact washers and plain washers Fig. 193: 11 bolted joints at the labyrinth, top side Remove the labyrinth, and store it. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 135 • 6 bolts M8x20 with contact washers Fig. 195: 4 bolted joints on metal cover in voltage Fig. 196: 2 bolted joints on metal cover in switching-device transformer compartment compartment ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 136 To get the voltage transformer compartment over the door threshold, lift it approx. 2 cm. Pull the voltage transformer compartment out of the panel, and store it. Fig. 199: Lifting and pulling Fig. 200: Voltage transformer compartment, removed ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 137 Fig. 201: 4 bolted joints on protection plate of switching-device compartment Remove the connecting elements from the partition, and store them: • 8 bolts M8x20 with contact washers and plain washers (4) Fig. 202: 8 bolted joints on partition ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 138 3 nuts M8 with contact washers and plain washers (3) Fig. 203: Bolted joints at the cable connections (central joint covered) Detach the 3 connecting cables (4) for the removable voltage transformers from the cable connections / bar connections. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 139 3 bolts M8x20 with contract washers (6) Fig. 204: 11 bolted joints on bushing plate Remove the bushing plate, and store it. ✓ Access to the connection compartment through the panel front is given. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 140: Accessing The Connection Compartment Through The Rear
Store disassembled parts and connecting elements carefully, and keep them ready for later reuse. INFORMATION Switch-disconnector panel Accessing the switching-device / connection compartment through rear side of the switch-disconnector panel is not possible in the switch-disconnector panel. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 141: Accessing The Connection Compartment Through The Rear Side Of The Panel
Verify that the position indicator of the feeder earthing switch on the high-voltage door shows the vertical I position. Fig. 205: All panel versions except for contactor panels with panel width 435 mm and switch-disconnector panel: Position indicator of feeder earthing switch on high-voltage door ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 142 9 bolts M8x25 with contact washers and plain washers Remove the horizontal ledge, and store it together with the associated connecting elements. Remove the connecting elements from one of the vertical ledges (2): • 14 bolts M8x20 with contact washers ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 143 Loosen the connecting elements at the panel base: • 4 bolts M8x20 with contact washers (5) Remove the rear wall (4). To do this, lift the rear wall by the handle, and pull it out. Store the rear wall. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 144 Remove the vertical ledge, and store it together with the associated connecting elements. Proceed in the same way with the other vertical ledge. (1) Vertical ledges Fig. 212: Contactor panels with panel width 435 mm only: 30 bolts in the ledges ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 145 (4) Rear wall with handle Fig. 214: Contactor panels with panel width 435 mm only: Removing the rear wall ✓ Access to the connection compartment through the rear side of the panel is given. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 146: Accessing The Connection Duct Through The Rear Side Of The Panel
Feeder earthing switch in CLOSED position Procedure Verify that the position indicator of the feeder earthing switch on the high-voltage door shows the vertical I position. Fig. 215: Position indicator of feeder earthing switch on high-voltage door ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 147 Remove the lower rear wall (4). To do this, lift the rear wall by the handle, and pull it out. Store the rear wall. Loosen the connecting elements of the upper rear wall in the upper area (1): • 4 / 5 bolts M8x20 with contact washers ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 148 Accessing the connection compartment through the rear To remove, pull the upper rear wall (2) downwards by the handle. Store the rear wall. ✓ Access to the connection compartment through the rear side of the panel is given. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 149: Electrical Connections
(2), and store the connecting elements. Check contact surfaces of all connection points of cable sealing ends, brush if necessary, and apply a thin film of Vaseline; then mount the connecting elements again. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 150: Cutting The Rubber Sleeves To Size
Cut an opening into the rubber sleeve that fits the diameter of the cable. Lead the cable through the opening in the rubber sleeve. Use one rubber sleeve per cable. Fig. 218: Rubber sleeve for cable, for example ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 151: Use Of Cable Lugs
ISO 7093 plus 2x conical spring washer 12 plus 1x nut M12 Connecting elements per phase: 1x bolt M16 plus 2x conical spring washer Bolt size M16 16 plus 1x nut M16 ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 152: Cable Clamps
Hexagon head bolt, steel (1) K 26/38 26 - 38 mm M10x80 K 36/52 36 - 52 mm M10x80 K 50/75 50 - 75 mm M10x100 K 66/90 66 - 90 mm M10x120 Manufacturer information: www.id-technik.com ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 153: Cable Sealing Ends
Use only sealing ends with the dimensions described hereafter. Depending on the manufacturer of the cable sealing ends, the dimensions may differ from those described in here. If the dimensions are different, please do absolutely contact the regional Siemens representative before installation. NOTICE...
Page 154: Dimensions Of Single-Core Cables
435 mm in contactor panel with panel width 435 mm (rear view) Diameter of cable sealing end Length of cable sealing end, incl. cable lug ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 155 Fig. 223: Connection compartment on panel with removable voltage transformers: removable voltage transformers: ≤ 12 kV = 17.5 kV Distance ≥ 100 mm Distance ≥ 160 mm Connecting cables from the insulating bushings for the removable voltage transformers ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 156: Dimensions Of Three-Core Cables
435 mm (side view) width 435 mm) Length of cable sealing end, incl. cable lug Length from cable lug up to and including heat- shrinkable splitting cap Diameter of cable sealing end ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 157: Assembly Of Cable Sealing Ends For Single-Core Cables (Except For Contactor Panel With Panel Width 435 Mm)
Fig. 226: Connection compartment with connections for 2 cables per phase (example) Cable connection for 2 cables per phase Cable clamp (not supplied) Floor plate with rubber sleeve Earth connection, connection bolt for earth connection size M12x35 Cable bracket ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 158 To bolt the cable sealing ends together with the cable connecting lug, always use the bolting material pre-assembled at the connecting lug. To coordinate a different procedure, please contact the regional Siemens representative. Detail view acc. to Fig. 228: Fig.
Page 159 Lead the cable lug of each earth connection directly to the earthing busbar, keeping the maximum possible distance to live parts. ✓ The cables and the cable sealing ends are mounted in the connection compartment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 160: Assembly Of Cable Sealing Ends For Single-Core Cables In Contactor Panel With Panel Width 435 Mm
Bolt the cable lug of the cable sealing end onto the connection points without distortions or gaps using the delivered connecting bolts. Fasten the cable at the cable bracket. (Use antimagnetic clamps for single-core cables). ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 161: Assembly Of Cable Sealing Ends For Three-Core Cables (Except For Contactor Panel With Panel Width 435 Mm)
Lead the earthing cable back through the cable clamp and the zero- sequence current transformer, and connect it to the earthing busbar. INFORMATION Do not attach phase tapes to the cable sealing ends. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 162 8 acc. to ISO 7093 16 bolts M8x20 plus plain washers size 8 acc. to ISO 7093 Cover plate for elongated cutout in deep bottom Fig. 232: Pre-assembled bottom pan ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 163 Cut an opening into the rubber sleeve that fits the diameter of the cable. Lead the cable through the opening in the rubber sleeve. Split the three-core cable into single cables, mount the heat-shrinkable splitting cap, and lead the earthing connection out. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 164 4 bolts size M8 plus plain washers size 8 acc. to ISO 7093 Fig. 235: Assembly of the cable bracket Fasten the cable to the cable bracket underneath the heat-shrinkable splitting cap; use a clamp. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 165 800 mm 1000 mm = 17.5 kV Length (1) [mm] ≤ 12 kV Length (2) [mm] ✓ The bottom pan, the cables and the cable sealing ends are mounted in the connection compartment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 166: Assembly Of Cable Sealing Ends For Three-Core Cables In Contactor Panel With Panel Width 435 Mm
Lead the earthing cable back through the cable clamp and the zero- sequence current transformer, and connect it to the earthing busbar. INFORMATION Do not attach phase tapes to the cable sealing ends. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 167 Set the front plate and the rear wall down onto 4 standing studs size M8 each at the front and rear side in the connection compartment. Take the bag unit with the connecting elements from the supplementary equipment of the delivery. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 168 8 contact washers size 8 8 hexagon nuts M8 plus 8 plain washers size 8 acc. to ISO 7093 (from bag unit) (3) 4 nuts M8 (from bag unit) Fig. 239: Assembly of the lateral parts ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 169 Insert the cable bracket (1), and put it in position. Fasten the cable bracket using the connecting elements (2). Cable bracket 4 nuts M8 plus 4 plain washers size 8 acc. to ISO 7093 Fig. 241: Assembly of the cable brackets ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 170 Bolt one cable lug each to one of the connection points of a phase, without distortions and gaps, using the supplied connecting elements. ✓ The bottom pan, the cables and the cable sealing ends are mounted in the connection compartment. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 171: Connecting Control Cables
Clamp or plug bus wires into the bus wire terminal block in the low-voltage compartment. Fig. 244: Inside view of the low-voltage compartment with terminal block ✓ Control cables and bus wires are connected. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 172: Closing The Connection Compartment / Connection Duct
Some parts and surfaces of the switchgear are greased for functioning. Do not remove the grease there; do not clean the parts and surfaces. If greased areas are dirty, clean the dirty area and grease again according to the maintenance instructions. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 173: Installing The Vertical Partition In The Switching-Device Compartment
In addition to these instructions, an instruction label on the vertical partition informs about safe fastening of the partition: Fig. 245: All panel versions except for contactor panels with panel width 435 mm and switch-disconnector panel: Instruction label on the vertical partition ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 174 Tighten the fixing bolts all around with a tightening torque of 25 Nm. Fig. 246: All panel versions except for contactor panels with panel width 435 mm and switch-disconnector panel: 15 bolted joints on partition ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 175 Fix the left part of the partition (3), tighten the bolts all around hand-tight: • 7 bolts M8x20 with contact washers (4) Tighten the fixing bolts all around with a tightening torque of 25 Nm. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 176 Fig. 251: 2 bolted joints on the heater Fig. 252: 2 bolted joints on the heater support INFORMATION Final procedure step Do not forget to switch on the heater after the installation. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 177: Installing The Vertical Partition And The Ventilation Duct Type I In The Switching-Device Compartment
Cover sharp-edged spots, if required. CAUTION High weight The ventilation duct is heavy. The ventilation duct must absolutely be lifted by 2 persons. Put on personal protective equipment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 178 10 bolts M8x20 with contact washers and plain washers size 8 acc. to ISO 7093 (2) • 5 bolts M8x20 with contact washers (3) Tighten the fixing bolts all around with a tightening torque of 25 Nm. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 179 Tighten the fixing nuts (5) with a tightening torque of 25 Nm. Fig. 256: 4 bolted joints on protection plate of switching-device compartment If required, bend dented links back into the correct position before installing the ventilation duct. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 180 Fig. 260: Set the ventilation duct down centrally on the base frame of the panel Tighten the front bolts at the base frame hand-tight. Tighten the bolts with a tightening torque of 25 Nm. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 181 Tighten the upper bolts M8x20 at the vertical partition hand-tight. Tighten the bolts with a tightening torque of 25 Nm. Fig. 263: 4 bolted joints on partition Fold the air guide downwards. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 182: Installing The Vertical Partition And The Ventilation Duct Type Ii In The Switching-Device Compartment
Put on personal protective equipment (e.g. cut-resistant gloves and arm sleeves). When working inside the switchgear, it must be observed that cables do not touch any sharp-edged sheets. Cover sharp-edged spots, if required. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 183 In addition to these instructions, an instruction label on the vertical partition informs about safe fastening of the partition: Fig. 266: Instruction label on the vertical partition ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 184 Install the protection plate (5). Fix the protection plate (5) by screwing the nuts (6) hand-tight. • 4 nuts M8 with contact washers Tighten the fixing nuts with a tightening torque 25 Nm. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 185 Now the panel can be integrated into the course of operation again, for example: Inserting a withdrawable part in the panel. Closing the high-voltage door. De-earthing the feeder earthing switch. Racking the withdrawable part to service position. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 186: Installing The Bushing Plate, The Vertical Partition And The Voltage Transformer Compartment In The Switching-Device Compartment
Protection plate of switching-device compartment and associated connecting elements available: • 4 nuts M8 with contact washers • Voltage transformer compartment and associated connecting elements available: • 14 bolts M8x20 with contact washers ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 187 Fix the connecting leads (4). To do this, mount the connecting elements (3) and tighten hand- tight: • 3 nuts M8 with contact washers and plain washers Tighten the nuts with a tightening torque of 25 Nm. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 188 Install the protection plate of the switching-device compartment. Fix the protection plate by screwing the nuts hand-tight: • 4 nuts M8 with contact washers Tighten the nuts with a tightening torque of 25 Nm. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 189 Fig. 276: Voltage transformer compartment Fix the voltage transformer compartment by screwing the bolts hand-tight: • 10 bolts M8x20 with contact washers Tighten the bolts with a tightening torque of 25 Nm. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 190 2 bolts M8x20 with contact washers Tighten the bolts with a tightening torque of 25 Nm. Fig. 279: Lid of metal cover Fig. 280: 2 bolted joints on metal cover in switching-device compartment ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 191 Tighten the bolts with a tightening torque of 25 Nm. Fig. 281: 2 bolted joints on wiring duct cover Install the labyrinth. Fig. 283: Labyrinth installed, top side Fig. 282: Labyrinth installed, front ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 192 Tighten the fixing bolts at the top side of the labyrinth hand-tight: • 11 bolts M8x16 with contact washers Tighten the bolts with a tightening torque of 25 Nm. Fig. 285: 11 bolted joints at the labyrinth, top side ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 193: Installing The Rear Wall On The Connection Compartment
Perform final checks regarding the correct state and position of the shutter (1) and the levers (2) for moving the shutter. If any of these checks fails, do not insert any removable voltage transformers in the voltage transformer compartment, but inform the regional Siemens representative.
Page 194 (1) Rear wall with handle (2) Bolts to screw Fig. 289: All panel versions except for contactor panels with panel width 435 mm and switch- disconnector panel: Installing and fixing the rear wall ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 195 (5) Vertical ledges Fig. 290: All panel versions except for contactor panels with panel width 435 mm: Installing the sealing brackets and ledges ✓ The rear wall is installed on the connection compartment. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 196 Install one of the vertical ledges (4). For fixing, tighten the bolts hand-tight: • 15 bolts M8x20 with contact washers Tighten the bolts with a tightening torque of 25 Nm. Proceed in the same way with the other vertical ledge. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 197: Installing The Rear Walls On The Connection Duct
Insert the upper rear wall (2) on the rear side of the panel and push it up using the handle. Fix the rear wall by screwing the bolts in the upper area hand-tight: • 4 / 5 bolts M8x20 with contact washers (1) ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 198 ISO 7093 with the bolt fixing in the area of the vertical ledges Tighten all bolts with a tightening torque of 25 Nm. ✓ The rear walls are installed on the connection duct. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 199: Final Assembly Work
If greased areas are dirty, clean the dirty area and grease again according to the maintenance instructions. NOTICE Cleaning Use vacuum cleaners and dry, lint-free cloths. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 200: Tightening Torques And Control Tightening Torques For Bolted Joints
In the connection compartment The check of the bolted joints comprises: Check of the tightening torque with a torque wrench. If required, correction of the tightening torque according to the above specifications. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 201: In Panels Without Ventilation Duct: Check The Floor Fixing In The Switching-Device Compartment
Do not reach into the shutters in front of the bushings. Do not operate the shutters in front of the bushings manually. Do only open and close the shutters with the corresponding shutter levers, see Operating Instructions with order number 110-0134.9. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 202: Checking The Withdrawable Part On The Service Truck / Checking The Switching-Device Truck
12.10 Checking the withdrawable part on the service truck / checking the switching-device truck Remove foreign objects. For cleaning the circuit-breaker, see separate operating instructions for circuit-breaker 3AE. 12.11 Checking the service truck Remove foreign objects. Clean the service truck. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 203: Checking And Completing Protection Against Adverse Environmental Influences (Protection Against Corrosion)
If the position indicator shows that the ventilation flap in the high-voltage door is not in operational position: Bring the ventilation flap into operational position as described in the Operating Instructions with order number 110-0134.9. ≤ 110-0084.9 / 15 NXAIR / 40 kA...
Page 204: Checking Assembly Work
Note any modifications in the supplied circuit documentation, which may have been made during installation or commissioning, in the associated documents. Send the corrected documentation to the regional Siemens representative, so that the modifications can be included. 12.16 Installation report After erecting the switchgear, fill in the Installation Report according to chapter 17 and send it to the address given in the Installation Report.
Page 205: Installation Of Withdrawable Parts / Switching-Device Trucks
Fig. 298: Front view of Fig. 299: Front view of withdrawable circuit-breaker contactor truck ✓ The solenoid interlocks in the operating mechanism for withdrawable parts / switching-device trucks are now ready for operation. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 206: Commissioning Procedure
Update the firmware of the protection relays with the latest firmware version. Siemens protection relays are monitored for their firmware vulnerability. In case that any potential weak points are identified which might allow third parties to access to the protection relay, information concerning this will be distributed by newsletter.
Page 207: Drying Dampness
For latest firmware version for Siemens devices please visit below internet site. • http://w3.siemens.com/smartgrid/global/en/products-systems- solutions/downloads/Pages/Overview.aspx For protection relays of other manufacturers please get in touch with the Original Equipment Manufacturer. 14.3 Drying dampness If the panels become damp by condensation or high humidity, e.g. prevailing during erection, they must be dried.
Page 208: Test Operation
This is a permissible operating state. Expect motor noise and low vibration. Switch the auxiliary voltage on. ✓ The motors of the circuit-breaker operating mechanisms now start up and charge the closing springs. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 209: Switching On Operational High Voltage
NOTICE Detection of an error Do not put the switchgear into operation. Inform the regional Siemens representative. Checking the switching process and the position indicators Rack each withdrawable part / switching-device truck from test position to service position and back five times. At the same time, check whether the associated positions of the withdrawable part / switching-device truck are displayed correctly at the panel and, if applicable, in the control room.
Page 210 Energize tested incoming feeder. Energizing consumer feeders After having energized all incoming feeders: Switch on all feeders with connected consumers successively. ✓ Now all feeders are energized. Thus, the switchgear is completely in operation. ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 211: Customer Support
For further support, contact the Siemens after-sales service. 15.2 Repairs Repairs are carried out by trained Siemens technicians, who arrive equipped with original spare parts for the switchgear. 15.3 Before you call To help us deal with your query more quickly, make sure that the following information is at hand: •...
Page 212: Service Information
Electrical wires and electronic equipment such as relays, control boards, voltmeters, ammeters As delivered by Siemens, the switchgear does not contain hazardous materials as per the Hazardous Material Regulations applicable in the Federal Republic of Germany. For operation in other countries, the locally applicable laws and regulations must be followed.
Page 213: Installation Report
Bolted joints of conductor bars (busbars) tightened with 70 Nm for M12? Busbar compartment cleaned? Insulating caps installed in busbar compartment at U = 17.5 kV? 1.10 Insulation caps installed in busbar compartment at switch-disconnector panel? 110-0084.9 / 15 NXAIR / 40 kA...
Page 214 Withdrawable parts / switching-device trucks coded according to the withdrawable part / switching-device truck specification of the complete switchgear? All withdrawable contactors equipped with HV HRC fuse-links? Withdrawable parts / switching device trucks cleaned? ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 215 Opening of the vacuum contactor performed manually? Function of the voltage indicators checked? Electrical position signaling and remote control Position signaling and remote control was tested up to: Terminal strip in feeder panel? Transfer terminal strip? Digital input/output unit? 110-0084.9 / 15 NXAIR / 40 kA...
Page 216 (test of transformer ratio with e.g. 5 kV) 10.2 Voltage transformers earthed on primary side (X, N)? Secondary test completed? 10.3 (test of sense of direction of the secondary winding, e.g. with battery box) 10.4 Secondary windings earthed? ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 217 DANGER Hazardous voltage Before high-voltage test: • Capacitive voltage indicators must be short-circuited. • Secondary circuits of current transformers must be short-circuited. • Voltage transformers and surge arresters/limiters must be disconnected. 110-0084.9 / 15 NXAIR / 40 kA...
Page 218 Installation report to be submitted after completion via e-mail or normal mail to: E-mail: support.energy@siemens.com Siemens AG Global Customer Care AIS-MV Postal EM MS GCC AIS-MV Carl-Benz-Straße 22 address: 60386 Frankfurt am Main Germany Fax: +49 69 4008-2623 ≤ NXAIR / 40 kA 110-0084.9 / 15...
Page 219 Installation report Remarks: ....................................................Responsible for installation / commissioning: Signature of tester: Name: Department: Telephone: Date: City: 110-0084.9 / 15 NXAIR / 40 kA...
Page 220: Index
........193 Connection duct Hazardous substances........7 accessing through the rear ......146 Heavy weight slings, attaching ......40 installing the rear wall........197 High-voltage test ..........217 Contact partner, service ........211 110-0084.9 / 15 NXAIR / 40 kA...
Page 221 ............ 133 Rear wall, removing ........ 140, 146 Repairs ............211 Replacement of panels and components ..212 Warning ............. 3 Wiring duct cover ..........88 Withdrawable parts, assembly ......205 Safety instructions ........3, 206 110-0084.9 / 15 NXAIR / 40 kA...
Page 222 Imprint Siemens AG Smart Infrastructure Distribution Systems Switchgear Factory Frankfurt Carl-Benz-Str. 22 D-60386 Frankfurt © Siemens AG 2020 110-0084.9 / 15 NXAIR / 40 kA...

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