Siemens NXAIR M Installation Instructions Manual
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Siemens NXAIR M Installation Instructions Manual

Siemens NXAIR M Installation Instructions Manual

Medium-voltage switchgear, 24 kv / 25 ka / ≤ 2500 a busbar current
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Medium-Voltage Switchgear
Air-Insulated Switchgear NXAIR M
24 kV / 25 kA / ≤ 2500 A Busbar Current
© Siemens AG 2018 All rights reserved.
INSTALLATION INSTRUCTIONS
Order No.:
Issue:
Revision:
139-2019.9
September 2018
07

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  • Page 1 Medium-Voltage Switchgear Air-Insulated Switchgear NXAIR M 24 kV / 25 kA / ≤ 2500 A Busbar Current INSTALLATION INSTRUCTIONS Order No.: 139-2019.9 Issue: September 2018 Revision: © Siemens AG 2018 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

    If the damaging situation is not avoided, the product or something in its vicinity may sustain damage. HINT Provides additional information to clarify or simplify a procedure. Observe the hint. Operation symbol: Asks the operator to perform an operation.  Result symbol: Identifies the result of an operation. 139-2019.9 / 07 NXAIR M...

  • Page 4: Table Of Contents

    Assembling the busbars ..........................89 8.11 Bolting panels together ..........................100 8.12 Interconnecting the earthing busbar ......................111 8.13 Earthing the switchgear ........................... 112 8.14 Switchgear protection IP4X (optional) ...................... 113 8.15 Components without installation activity ....................113 NXAIR M 139-2019.9 / 07...
  • Page 5 Checking the service truck ........................184 14.12 Checking and completing protection against adverse environmental influences (protection against corrosion) ............................ 185 14.13 Checking assembly work ......................... 185 14.14 Correcting circuit diagrams ........................185 14.15 Installation report ............................. 185 139-2019.9 / 07 NXAIR M...
  • Page 6 Replacement of panels and components ....................194 18.4 Disposal ..............................194 19 Installation report ..........................195 20 Index ............................... 201 Document information: Title: Installation Instructions Order number: 139-2019.9 Additional order number: 8BX3300-0LA00-0AD1 Revision: Issue: September 2018 NXAIR M 139-2019.9 / 07...

  • Page 7: General Instructions

    Siemens, including documentation of the test results.  Maintenance was not done according to the Installation Instructions of the Siemens products. The edition of the standard is only mentioned in the test report applicable at the time of switchgear manufacture.

  • 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 M medium-voltage switchgear is IP3XD according to IEC 60529.

  • Page 9: Qualified Personnel

    This installation training provides detailed information about design, operation, installation and trouble shooting on the primary part of NXAIR M switchgear. After successful participation, the participants in this training get a certificate. This certificate authorizes the participants to install, assemble and connect this medium-voltage switchgear electrically at their own responsibility.

  • 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: Foundation

    Siemens representative.  If the foundation has to be resistant to earthquakes, additional points must be considered. Please seek the corresponding information in time. Your regional Siemens representative will be pleased to give you advice.  Determine level differences between the installation surfaces of the panels using a measuring sheet, and compensate these level differences with shims (0.5 to 1.0 mm).

  • Page 12: Dimensions Of The Switchgear Room

    Fig. 3: Dimensions of the switchgear room, absorber For connection from the rear: ≥ 500 mm; also valid with rear connection duct For panel replacement: Control aisle: ≥ 1350 mm For further information, see information drawings NXAIR M, order number 139-2084.9. NXAIR M 139-2019.9 / 07...

  • Page 13: Switchgear With Evacuation Ducts

    For connection from the rear: ≥ 500 mm; also valid with rear connection duct For panel replacement: Control aisle: ≥ 1350 mm For further information, see information drawings NXAIR M, order number 139-2084.9. 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 14: 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. NXAIR M 139-2019.9 / 07...

  • Page 15: 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 16: 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  Self-levelling line laser NXAIR M 139-2019.9 / 07...

  • Page 17: 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. 139-2019.9 / 07 NXAIR M...

  • Page 18: Installation And Fixing Material Without Additional Earthquake Stabilization

    Expansion dowel with hexagon Washer ISO 7094 - 16 - 100 HR (10) head bolt and washer: FAN 12/10 Hexagon nut ISO 4032 – M16 – 8 Base frame of panel (11) Floor finish Min. 50 mm NXAIR M 139-2019.9 / 07...
  • Page 19 Floor fixing plate (holder for profiles at a distance ≥ 1200 mm), (11) Floor finish Fig. 8: Side view of the fixing plate Min. 55 mm Version with fixing on double floor Fig. 7: Fixing on double floor 139-2019.9 / 07 NXAIR M...
  • Page 20 Welded seams are susceptible to corrosion. After welding, protect the welded seams professionally against corrosion. Fig. 8: Side view of the fixing plate Fig. 9: Top view of the fixing plate Fig. 10: Front view of the fixing plate NXAIR M 139-2019.9 / 07...

  • Page 21: 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 M, order number 139-2084.9. 6.13 Installation and fixing material with additional earthquake stabilization Before installing the individual components, the installation and fixing material required has to be prepared.
  • Page 22 Welded seams are susceptible to corrosion. After welding, protect the welded seams professionally against corrosion. Fig. 12: Side view of the fixing plate Fig. 13: Top view of the fixing plate Fig. 14: Side view of the fixing plate NXAIR M 139-2019.9 / 07...

  • Page 23: Drilling Template For Additional Earthquake Stabilization

    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 M, order number 139-2084.9. 6.14 Drilling template for additional earthquake stabilization As support to determine the marking points of the threaded holes M12, a drilling template is available as an optional accessory.
  • Page 24 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 M 139-2019.9 / 07...

  • Page 25: 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. 139-2019.9 / 07 NXAIR M...

  • Page 26: Checking For Completeness And Transport Damages

    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 film until reaching the place of installation in order to keep the switchgear as clean as possible.

  • Page 27: Center Of Gravity Of The Panel

    1600/1750 1400 Disconnecting panel Additional weight of rear duct Weight Panel width (W) Duct depth approx. [mm] [mm] [kg] Rear duct Rear duct 1000 For further information, see information drawings NXAIR M, order number 139-2084.9. 139-2019.9 / 07 NXAIR M...

  • Page 28: Transport To The Place Of Installation (Switchgear Room)

    Do not try to remove the withdrawable part while the panel is standing on the wooden pallet. Do not move the service truck in front of the panel if the panel is not standing directly on the floor. NXAIR M 139-2019.9 / 07...

  • Page 29: Applying The Lifting Tool At The Panel

    While moving panels, there is risk of overloading the human body. Use only suitable lifting tools. At the place of installation, observe the valid limit values for lifting and carrying. Put on personal protective equipment. 139-2019.9 / 07 NXAIR M...
  • Page 30 Incorrect application of lifting tool Not permissible application of a lifting tool: Fig. 23: Incorrect application of lifting tool Fig. 24: Incorrect application of lifting tool NXAIR M 139-2019.9 / 07...

  • Page 31: Mounting The Craning Angles

    Craning angles at the side of the panel: 3 bolted joints M8x20. Craning angles at the rear of the panel: 2 bolted joints M8x20. Observe the information drawings NXAIR M, order number 139-2084.9. HINT 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 32 According to the panel version, select the suitable craning angles from the set (see preceding illustrations or also information drawings NXAIR M, order number 139- 2084.9). Bolt each craning angle with 2 or 3 bolts M8x20 onto the panel at the corresponding position.
  • Page 33 Push the sealing stopper (1) out of the end wall to clear the opening for the crane rod. Lay the sealing stopper down in the low-voltage compartment, and store it. The sealing stopper is pushed back into the end wall at the end of installation. Fig. 29: End panel as an example 139-2019.9 / 07 NXAIR M...

  • Page 34: Lifting With Crane Rods

    Length of crane rods B [mm] Panel width Panel depth Protrusion A Rear duct [mm] [mm] [mm] Front / Lateral Rear without 1600, 1750 1000 without > 2200 > 1600 > 300 with 2300, 2450 1000 with NXAIR M 139-2019.9 / 07...
  • Page 35 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 M, order number 139-2084.9. Fig. 31: Crane rods at the front and rear Fig.
  • Page 36 Distances: (1) Clearance between crane rod and crane hook: > 2000 mm (2) Protrusion A: > 300 mm Fig. 35: Distances for craning  The panel is prepared for craning with crane rods. NXAIR M 139-2019.9 / 07...

  • Page 37: Lifting By Means Of Chains And Crane Hooks

    According to the guide of the crane crossbar, attach the crane hooks at the side of the panel or at the front and rear to the craning angles. Fig. 36: Transport unit suspended from a crane crossbar  The panel is prepared for craning with chains and crane hooks. 139-2019.9 / 07 NXAIR M...

  • Page 38: 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. NXAIR M 139-2019.9 / 07...
  • Page 39 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. 139-2019.9 / 07 NXAIR M...
  • Page 40 Unloading and erection Fig. 38: The panel placed on hydraulic lifter Fig. 39: Permissible application on the switchgear frame NXAIR M 139-2019.9 / 07...

  • Page 41: 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 M, order number 139-2084.9. 7.15 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 42: Assembling The Panels

    110 Nm 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 M 139-2019.9 / 07...

  • Page 43: Switchgear Configuration

    Interconnecting the busbars • Closing the busbar compartment • Assembling and interconnecting the earthing busbars • Assembling and interconnecting the additional compartment to the busbar compartment (optional) • Assembling and interconnecting the pressure relief duct 139-2019.9 / 07 NXAIR M...

  • Page 44: Undoing The Transport Fixing Of The Busbars

    Remove 2 fixing bolts from the transport retainer (2). Remove transport retainer (5). Remove fixing bolts of busbars (3). Detach the busbars (1). Dispose of strip fasteners, transport retainer and bolts correctly.  The busbars are ready for use. NXAIR M 139-2019.9 / 07...

  • Page 45: Installing Additional Compartment For Busbar Connection To The Top (Optional)

    If possible, line up the panels individually and install the additional compartment to the busbar compartment before positioning the next panel. Perform busbar assembly from the side. For further information, see information drawings NXAIR M, order number 139-2084.9. Preparing the panel Fig. 43: Busbar system 1250 A Fig.
  • Page 46 (approx. 150 kg), and for the panel dimensions. Use lashing means such as ropes, chains, heavy weight slings and similar symmetrically to the lifted load and with the same length. Pad the lashing means and affected areas of the transport unit accordingly. NXAIR M 139-2019.9 / 07...
  • Page 47 Insert the retaining plate for the bushings (5) into the additional compartment to the busbar compartment (4) from above so that the marking hole (7) points to the front of the panel. Fig. 47: Inserting the retaining plate for the bushings 139-2019.9 / 07 NXAIR M...
  • Page 48 Hold the bushing and push the toroidal sealing rings (2) over the bushings from below until the respective toroidal sealing ring is lying all around in the groove. The toroidal sealing rings fix the bushings in the retaining plate. Verify firm seat of the bushings in the retaining plate. NXAIR M 139-2019.9 / 07...
  • Page 49 Push an insulating tube 125x615 mm (2) over the external busbars (L1 and L3) from above until the insulating tube is firmly inserted in the bushing mounted in the previous work operation. Align the insulating tubes centrally at the top of the busbars. 139-2019.9 / 07 NXAIR M...
  • Page 50 32 bolts M8x20 with contact washers. Fig. 51: Fastening the roof of the additional compartment Push an insulating tube 125x230 mm (2) over each busbar from above until it is firmly inserted in the pre-assembled bushing. NXAIR M 139-2019.9 / 07...
  • Page 51 (1) 4 bolts M8x20 5 bolts M8x20 with with contact washers contact washers and plain washers (2) 7 bolts M8x20 5 bolts M8x20 with with contact washers contact washers 11 bolts M8x20 with contact washers 139-2019.9 / 07 NXAIR M...
  • Page 52 (approx. 150 kg), and for the panel dimensions. Use lashing means such as ropes, chains, heavy weight slings and similar symmetrically to the lifted load and with the same length. Pad the lashing means and affected areas of the transport unit accordingly. NXAIR M 139-2019.9 / 07...
  • Page 53 Insert the retaining plate for the bushings (5) into the additional compartment to the busbar compartment (4) from above so that the marking hole (7) points to the front of the panel. Fig. 57: Inserting the retaining plate for the bushings 139-2019.9 / 07 NXAIR M...
  • Page 54 Hold the bushing and push the toroidal sealing rings (2) over the bushings from below until the respective toroidal sealing ring is lying all around in the groove. The toroidal sealing rings fix the bushings in the retaining plate. Verify firm seat of the bushings in the retaining plate. NXAIR M 139-2019.9 / 07...
  • Page 55 Foreign objects Possible malfunctioning and damage to the panels caused by foreign objects. Before closing the additional compartment, remove all foreign objects, e.g.:  Tools  Unused installation material  Packing material  Cleaning material 139-2019.9 / 07 NXAIR M...
  • Page 56 6 bolts M8x20 with contact washers 5 bolts M8x20 with 4 bolts M8x20 with contact washers contact washers 11 bolts M8x20 with contact washers 7 bolts M8x20 with contact washers NXAIR M 139-2019.9 / 07...
  • Page 57 Fig. 66: Mounted additional compartment to busbar compartment, on an intermediate panel as an example, 2500 A busbar system  The additional compartment to the busbar compartment for busbar connection to the top is completely installed. 139-2019.9 / 07 NXAIR M...

  • Page 58: Installing Additional Compartment With Voltage Transformers (Optional)

    If possible, line up the panels individually and install the additional compartment to the busbar compartment before positioning the next panel. Perform busbar assembly from the side. NXAIR M 139-2019.9 / 07...
  • Page 59 Additional compartment to busbar compartment available with voltage transformers  Installation and fixing material available For further information, see information drawings NXAIR M, order number 139-2084.9. HINT For a better overview, the right side wall at the additional compartment to the busbar compartment is hidden in some of the following illustrations.
  • Page 60 Route the flexible steel tube through the opening (1) out of the additional compartment to the busbar compartment, and prepare it for laying into the low-voltage compartment. Fig. 70: Routing the low-voltage cables out NXAIR M 139-2019.9 / 07...
  • Page 61 Fastening the lateral insulating plate in operational position Remove 2 plastic bolts M8x20 (1) inside the additional compartment to the busbar compartment, and dispose of properly. Fig. 71: Bolted joints of lateral insulating plate, left side 139-2019.9 / 07 NXAIR M...
  • Page 62 In the additional compartment to the busbar compartment, remove 2 pairs of plastic bolted joints M8 (2) per phase separation plate (1) each, and keep them available. Fig. 73: Bolted joints of phase separation plates NXAIR M 139-2019.9 / 07...
  • Page 63 (7) Connecting cable to the voltage transformer, with cable lug for bolted joint (5) Attach one cable lug Ø 8 from the flat bag each at the end of the respective connecting cable to the three voltage transformers (7). 139-2019.9 / 07 NXAIR M...
  • Page 64 Foreign objects Possible malfunctioning and damage to the panels caused by foreign objects. Before closing the additional compartment, remove all foreign objects, e.g.:  Tools  Unused installation material  Packing material  Cleaning material NXAIR M 139-2019.9 / 07...
  • Page 65 Low-voltage cables from the additional compartment to the low-voltage compartment Lay the flexible steel tube inside the pressure relief duct, and fasten with 2 strip fasteners (2). Fig. 78: Low-voltage cables in the pressure relief duct 139-2019.9 / 07 NXAIR M...
  • Page 66 Close the entry opening for the flexible steel tube into the low-voltage compartment by adjusting the sealing plate (4). Re-tighten the bolted joints of the sealing plate (4).  The additional compartment to the busbar compartment with voltage transformers is completely mounted. NXAIR M 139-2019.9 / 07...

  • Page 67: Installing Additional Compartment With Busbar Earthing Switch (Optional)

    To prevent the earthing switch blades from turning by approx. 90°, the earthing switch blades of the busbar earthing switch are secured mechanically at the central earthing switch blade by means of a clip. 139-2019.9 / 07 NXAIR M...
  • Page 68 If the clip is missing:  Inform the regional Siemens representative.  Stop the installation work at the additional compartment to the busbar compartment. Fig. 83: Position of the clip at the central earthing switch blade...
  • Page 69 Additional compartment to busbar compartment with busbar earthing switch available  Installation and fixing material available For further information, see information drawings NXAIR M, order number 139-2084.9. HINT For a better overview, the right side wall at the additional compartment to the busbar compartment is hidden in some of the following illustrations.
  • Page 70 Fig. 86: Bolting the additional compartment together with the panel Undo 4 bolts M8x20 with contact washers at the additional compartment to the busbar compartment, and remove the cover (1). Fig. 87: Removing the cover at the front of the additional compartment NXAIR M 139-2019.9 / 07...
  • Page 71 If the clip is missing:  Inform the regional Siemens representative.  Stop the installation work at the additional compartment to the busbar compartment. Fig. 88: Position of the clip at the central earthing switch blade...
  • Page 72 NOTICE Incorrect bolted joint The insulating plates are designed for plastic bolted joints. Use only hexagon head bolts M8x16 made of plastic and washers made of plastic for bolting the insulating plates together. NXAIR M 139-2019.9 / 07...
  • Page 73 Fig. 91: Bolted joints of lateral insulating plate, left side Remove the lateral insulating plate (2). Execute 2 new bolted joints (1) with plastic bolts M8x16 and plain plastic washer size 8 acc. to DIN 34816. 139-2019.9 / 07 NXAIR M...
  • Page 74 Fastening the phase separation plates in operational position In the additional compartment to the busbar compartment, remove 2 pairs of plastic bolted joints (2) per phase separation plate (1) each, and keep them available. Fig. 93: Bolted joints of phase separation plates NXAIR M 139-2019.9 / 07...
  • Page 75 For all 3 earthing switch blades, check the grease on the contact surfaces on both sides of each earthing switch blade. If required, apply a uniform thin film of Longterm 2. Fig. 95: Contact surfaces of the earthing switch blades 139-2019.9 / 07 NXAIR M...
  • Page 76 Undo the clip for mechanical fastening of the busbar earthing switch at the central earthing switch blade (M8x20), and remove. Dispose of the clip and the bolt properly. Fig. 97: Clip to be removed at the central earthing switch blade NXAIR M 139-2019.9 / 07...
  • Page 77 Low-voltage cables from the additional compartment to the low-voltage compartment Undo 3 nuts M8 with contact washers (4) and take out the wiring duct (5) downwards out of the pressure relief duct. Fig. 100: Removing the wiring duct from the pressure relief duct 139-2019.9 / 07 NXAIR M...
  • Page 78 Re-tighten the bolted joints of the sealing plate (6). Re-insert the wiring duct (5) from below into the pressure relief duct, and fasten with 3 nos. nuts M8 with contact washers (4). Fig. 103: Installing the wiring duct in the pressure relief duct NXAIR M 139-2019.9 / 07...
  • Page 79 Re-tighten the bolted joints of the sealing plate (7).  The flexible steel tube with the low-voltage cables between the low-voltage compartment and the additional compartment to the busbar compartment is installed inside the pressure relief duct. 139-2019.9 / 07 NXAIR M...
  • Page 80 Busbar earthing switch in the additional compartment to the busbar compartment in OPEN position (earthing switch blade points vertically downwards)  Operating mechanism for the busbar earthing switch in the low-voltage compartment in OPEN position (position indicator shows horizontal bar)  Coupling, installation and fixing material provided NXAIR M 139-2019.9 / 07...
  • Page 81 Remove 3 studs with head, each with plain washer and retaining ring, from the coupling and keep them available. Fig. 108: Removing 3 studs from the coupling Push the sleeve, which can now move freely, to the center of the drive shaft. Fig. 109: Sleeve moves freely 139-2019.9 / 07 NXAIR M...
  • Page 82 Fig. 112: At the additional compartment Fig. 113: At the rear of the to the busbar compartment: low-voltage compartment: 2 studs in sleeve 1 stud in sleeve Fig. 114: Completely mounted coupling in the pressure relief duct NXAIR M 139-2019.9 / 07...
  • Page 83 If necessary, illuminate, e.g. using a hand lamp. For operation of the busbar earthing switch, see Operating Instructions NXAIR M, order number 139-2021.9. Preconditions  Busbar earthing switch in OPEN position ...
  • Page 84 CLOSED position (vertical bar). Remove the operating lever at the panel front. Check the insertion depth of the (10) earthing switch blades into the earthing switch contacts: Fig. 116: Earthing switch blades in CLOSED position NXAIR M 139-2019.9 / 07...

  • Page 85: Aligning The Panels

    Assembling the panels Measuring result for the dimension (10) less than 3 mm or more than 7 mm: Stop test and contact the regional Siemens representative. Measuring result for the dimension (10) between 3 mm and 7 mm: Open the busbar earthing switch using the operating lever at the panel front, then close it again.

  • Page 86: Fastening The Panels To The Foundation

    Compensate gaps up to 2.5 mm with sealing compound, e.g. SIKAFLEX 221 size 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 87 Nut-and-washer assembly M8 with contact washer Remove the bottom part from the front of the ventilation duct, and store it. Fig. 118: Bottom part, removed Fig. 119: Front floor opening in panel frame  Additional preparations are completed. 139-2019.9 / 07 NXAIR M...
  • Page 88 In case of welded floor fixing: Check the welded seam and the corrosion protection. Record the proper condition of the area after bolting together, so that this is clear without any doubt before commissioning the switchgear. NXAIR M 139-2019.9 / 07...

  • Page 89: Assembling The Busbars

    Observe the screwing 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. 139-2019.9 / 07 NXAIR M...
  • Page 90 Remove the transverse partition plate from the busbar compartment at the upper edge (1) together with 2 bolts M8x20 and plain washers size 8, and store both for later use. (1) Bolted joint (2) Transverse partition plate Fig. 121: Removing the transverse partition plate NXAIR M 139-2019.9 / 07...
  • Page 91 Leave a protrusion of approx. 15 mm when shortening the strip fasteners. (1) strip fastener, reclosable, (2) end cap, (3) insulating half-shell, bolt head side, (4) insulating half-shell, bolting side Fig. 122: Assembly parts for insulating shells 139-2019.9 / 07 NXAIR M...
  • Page 92 Fig 125: Mounted insulating shells, insulating shells; for example: end panel for example: end panel Busbar system 1250 A, example Bus sectionalizer panel Bus riser panel Intermediate panel End panel Fig. 126: Busbar system 1250 A, for example NXAIR M 139-2019.9 / 07...
  • Page 93 Fig. 128: Busbar 1250 A, Fig. 129: Busbar 1250 A, feeder ≤ 1250 A, Ur = 24 kV, feeder ≤ 1250 A, Ur = 24 kV, end panel with insulating shells end panel with mounted insulating shells 139-2019.9 / 07 NXAIR M...
  • Page 94 ≤ 1250 A, Ur = 24 kV, intermediate panel without insulating shells Busbar system 2500 A, example Bus sectionalizer panel Bus riser panel Intermediate panel End panel Fig. 131: Busbar system 2500 A, for example NXAIR M 139-2019.9 / 07...
  • Page 95 Fig. 133: Busbar 2500 A, Fig. 134: Busbar 2500 A, feeder ≤ 1250 A, Ur = 24 kV, feeder ≤ 1250 A, Ur = 24 kV, end panel with insulating shells end panel with mounted insulating shells 139-2019.9 / 07 NXAIR M...
  • Page 96 The bolt symbol indicates the screwing direction of the bolts. Bag with connecting elements: 139-0731.3 Fig. 136: Assembly of 2500 A busbar, feeder ≤ 2500 A, Ur = 24 kV, bolted joints at the end panel NXAIR M 139-2019.9 / 07...
  • Page 97 The bolt symbol indicates the screwing direction of the bolts. Bag with connecting elements: 139-0179.3 Fig. 139: Assembly of 2500 A busbar, feeder ≤ 2500 A, Ur = 24 kV, intermediate panel without insulating shells 139-2019.9 / 07 NXAIR M...
  • Page 98 In this context, also check the control tightening torques of the bolted joints, and correct the torques if required. Record the proper condition of the compartment after bolting together, so that this is clear without any doubt before commissioning the panels. NXAIR M 139-2019.9 / 07...
  • Page 99 HINT The insulating half-shells have a different shape for the bolt head side and the bolting side. Observe the direction of the bolted joints while mounting the insulating shells. 139-2019.9 / 07 NXAIR M...

  • Page 100: Bolting Panels Together

    Joining another panel covers the bolted joints of the transverse partition plate of the adjacent panel: Check the bolted joints of the transverse partition plate in advance with the control tightening torques, and correct if required. NXAIR M 139-2019.9 / 07...
  • Page 101 Fig. 142: Aligning the panel Fig. 143: Panel connection link Wiring duct cover in switching-device compartment CAUTION Sharp edges The metal parts of the wiring duct covers may have sharp edges. Put on personal protective equipment. 139-2019.9 / 07 NXAIR M...
  • Page 102 For bolting the panels together, use bag unit with order number 139-6749.3. After removing the connecting elements, the packing materials of the bag unit must be disposed of in an environmentally compatible way. The bag units can be re-ordered individually. NXAIR M 139-2019.9 / 07...
  • Page 103 Fig. 145: Bolted joints in the switching-device compartment Insert upper and lower wiring duct cover on the left inner side of the switching-device compartment, and fix each cover with bolts M8x20 with contact washers. Fig. 146: Fastening the wiring duct covers 139-2019.9 / 07 NXAIR M...
  • Page 104 Unused installation material  Packing material  Cleaning material Fasten the two pressure relief ducts in the upper area with 9 bolts M8x20 with contact washers. Fig. 147: Bolted joints in the upper area of the PRC NXAIR M 139-2019.9 / 07...
  • Page 105 Fasten the two panels in the lower area of the PRC with 6 bolts M8x25 with contact washers, plain washers size 8 and nuts M8. Fig. 149: Bolted joints in the lower area of the PRC 139-2019.9 / 07 NXAIR M...
  • Page 106 Assembling the panels Installation of deflector plates For further information, see information drawings NXAIR M, order number 139-2084.9. Bolting the low-voltage compartment together Bolt 2 panels each together laterally inside the low-voltage compartment using bolts M8x20 with contact washers and nuts M8. Depending on the panel version, there are 3 (height of low-voltage compartment 630 mm) or 5 (height of low-voltage compartment 980 mm) bolted joints.
  • Page 107 In this context, also check the control tightening torque of the bolted joints, and correct the torques if required. Record the proper condition of every compartment after bolting together, so that this is clear without any doubt before commissioning the switchgear. 139-2019.9 / 07 NXAIR M...
  • Page 108 Assemble the busbars and the transverse partition plate in / at the busbar compartment in the adjacent panel. Install and join all removed parts in reverse order. Fig. 152: PRD without additional installations Fig. 153: PRD with natural ventilation NXAIR M 139-2019.9 / 07...
  • Page 109 Fig. 155: View from the front: Fig. 156: View from the front: Absorber system installed left of the Absorber system installed right of the center of the switchgear row center of the switchgear row 139-2019.9 / 07 NXAIR M...
  • Page 110 (6). They must not be located in the upper latching positions (5). Check the position of the ventilation segments of the ventilation system. Fig. 158: Ventilation system in the pressure relief duct, view laterally from below NXAIR M 139-2019.9 / 07...

  • Page 111: Interconnecting The Earthing Busbar

    M12. Fig. 159: Link, view from the right Fig. 160: Cable compartment of the adjacent panel, rear view  The interconnections of the earthing busbar are completed. 139-2019.9 / 07 NXAIR M...

  • Page 112: Earthing The Switchgear

    Pull the substation earth into the connection compartment through the cutout (2) in the floor cover. Connect the substation earth according to the customer's specifications. Seal the cutout (2) in the floor cover, e.g. with SIKAFLEX 221 size 310 ML  Earthing of the switchgear is completed. NXAIR M 139-2019.9 / 07...

  • Page 113: Switchgear Protection Ip4X (Optional)

    SIKAFLEX 221 size 310 ML compound according to the installation drawings before final assembly of the switchgear. SIKAFLEX 221 size 310 ML is supplied with the accessories. For further information, see information drawings NXAIR M, order number 139-2084.9. 8.15 Components without installation activity HINT 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. 164: Overpressure monitors (3) and tubes (4) in the low-voltage compartment Fig. 165: Overpressure sensors (5) and tubes (4), for example in the switching-device compartment NXAIR M 139-2019.9 / 07...

  • Page 115: Installation Of The Panel Version For Double-Busbar System

    The panel with the interconnection frame at the rear, pre-assembled at the factory, is called panel A, the other one is panel B. Panel A Panel B Interconnection frame, pre-assembled on panel A at the factory Fig. 166: Panels for back-to-back arrangement 139-2019.9 / 07 NXAIR M...

  • Page 116: Transport Units And Packing

    Do not try to remove the withdrawable part while the panel is standing on the wooden pallet. Do not move the service truck in front of the panel if the panel is not standing directly on the floor. NXAIR M 139-2019.9 / 07...

  • Page 117: Checking For Completeness And Transport Damages

    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 118: Transport Weights And Dimensions Without Packing

    Disconnecting panel, panel A Note*: Panel depth of 1600 mm plus 150 mm interconnecting frame For further information, see information drawings NXAIR M, order number 139-2084.9. Switchgear room The requirements on the foundation design and the foundation fixing are identical with those of panel versions for single-busbar system.

  • Page 119: Foundation

    Siemens representative.  If the foundation has to be resistant to earthquakes, additional points must be considered. Please seek the corresponding information in time. Your regional Siemens representative will be pleased to give you advice.  Determine level differences between the installation surfaces of the panels using a measuring sheet, and compensate these level differences with shims (0.5 to 1.0 mm).

  • Page 120: Dimensions Of The Switchgear Room

    9.10 Switchgear with absorber B = panel width / T = panel depth complete Fig. 170: Dimensions of the switchgear room, absorber Panels A Panels B For further information, see information drawings NXAIR M, order number 139-2084.9. NXAIR M 139-2019.9 / 07...

  • Page 121: Switchgear With Evacuation Ducts

    Panels A Panels B For further information, see information drawings NXAIR M, order number 139-2084.9. 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 122: Tightening Torques And Control Tightening Torques For Bolted Joints

    Copper bar units, insulating plates and insulating boxes taken from interconnection compartment panel B on base frame For further information, see information drawings NXAIR M, order number 139-2084.9. Procedure Additional activities to be performed to interconnect panels in back-to-back arrangement: ...
  • Page 123 Starting from panel B, bolt the panel frames together with 22 or 25 bolts M8x20 with contact washers from the bag unit. Tighten the bolted joints M8 with a tightening torque of 30 Nm. Panel A Panel B Bolt-and-washer assemblies M8x20 Interconnection frame Fig. 174: Bolting the panel frames together 139-2019.9 / 07 NXAIR M...
  • Page 124 Ø 24 mm each Fig. 176: Internal connection bars, panel width 800 mm Tighten the bolted joints M8 with a tightening torque of 30 Nm and the bolted joints M12 with a tightening torque of 70 Nm. NXAIR M 139-2019.9 / 07...
  • Page 125 Ø 24 mm each Fig. 178: Internal connection bars, panel width 1000 mm Tighten the bolted joints M8 with a tightening torque of 30 Nm and the bolted joints M12 with a tightening torque of 70 Nm. 139-2019.9 / 07 NXAIR M...
  • Page 126 Mount the insulating shells for all three phases, and close with strip fasteners. Fig. 179: Assembly parts Fig. 180: Insulating shells, mounted (1) Strip fastener (2) End cap (3) Insulating half-shell, bolt head side (4) Insulating half-shell, bolting side NXAIR M 139-2019.9 / 07...
  • Page 127 8 acc. to ISO 7093. Tighten the bolted joints M8 with a tightening torque of 16 Nm. Fig. 181: Mounting the lateral insulating plates, panel width 800 mm Fig. 182: Mounting the lateral insulating plates, panel width 1000 mm 139-2019.9 / 07 NXAIR M...
  • Page 128 M8x25 acc. to DIN 34810 plus 2 plain washers size 8 acc. to DIN 34816 plus 2 plastic nuts M8 acc. to DIN 34814 (2). Tighten the bolted joints M8 with a tightening torque of 8 Nm. Fig. 183: Mounting the central insulating plates, panel width 800 mm NXAIR M 139-2019.9 / 07...
  • Page 129 For laying the low-voltage cables, the panels are equipped with wiring ducts (2). Fig. 184: Laying of low-voltage cables, with view onto panel A (1), left inner side of panel Fig. 185: Laying of low-voltage cables, with view onto panel A (1), right inner side of panel 139-2019.9 / 07 NXAIR M...
  • Page 130 Tighten the bolted joints M8 with a tightening torque of 30 Nm. Fig. 186: Connection link between the end walls For further activities such as busbar assembly, see chapter 8.  The installation work required for back-to-back arrangement is completed. NXAIR M 139-2019.9 / 07...

  • Page 131: Accessing The Connection Compartment Through The Front

    10.1 Preparations before accessing the connection compartment Preconditions  Withdrawable part inserted in the switching-device compartment:  High-voltage door closed  Withdrawable part in test position  Feeder earthing switch in CLOSED position 139-2019.9 / 07 NXAIR M...
  • Page 132 O symbol, the feeder is not earthed. Before proceeding, do absolutely earth the feeder:  For inserting a withdrawable part in the panel, see Operating Instructions with order number 139-2021.9.  Earth the feeder, see Operating Instructions with order number 139-2021.9 NXAIR M 139-2019.9 / 07...

  • Page 133: Accessing The Connection Compartment Through The Switching-Device Compartment

    15 bolts M8x20 with contact washers and plain washers Remove the partition (3), and store it. Fig. 190: 15 bolted joints on partition in circuit-breaker panel, panel spacing 800 mm  Access to the connection compartment through the panel front is given. 139-2019.9 / 07 NXAIR M...

  • Page 134: Accessing The Connection Compartment Through The Switching-Device Compartment In Panel Versions With Ventilation System

    High weight The ventilation duct is heavy. The ventilation duct must absolutely be lifted by 2 persons. Put on personal protective equipment. Preconditions  Preparations as described in chapter 10.1 completed Fig. 191: Panel prepared NXAIR M 139-2019.9 / 07...
  • Page 135 Fold the air guide upwards. Fig. 194: Air guide folded upwards Fig. 193: Folding the air guide upwards Unscrew the upper bolts from the partition, and store them. Fig. 195: 3 bolted joints on partition 139-2019.9 / 07 NXAIR M...
  • Page 136 Fig. 197: 4 bolted joints on base frame, Fig. 198: Lifting and pulling at the front Fig. 199: Ventilation duct removed Fig. 200: Switching-device compartment without ventilation duct NXAIR M 139-2019.9 / 07...
  • Page 137  4 nuts M8 with contact washers Remove the protection plate of the switching-device compartment (1) from the switching- device compartment, and store it. Fig. 203: 4 bolted joints on protection plate of switching-device compartment 139-2019.9 / 07 NXAIR M...
  • Page 138  16 bolts M8x20 and plain washers (4) Remove the partition (2), and store it. Fig. 204: 16 bolted joints on partition  Access to the connection compartment through the panel front is given. NXAIR M 139-2019.9 / 07...

  • Page 139: Accessing The Connection Compartment Through The Switching-Device Compartment In Panel Versions With Voltage Transformer Compartment

    1000 mm Remove the wiring duct cover (4), and store it. For panel width 1000 mm: Remove the metal cover (6), and store it. Remove 8 bolts M8x20 at the voltage transformer compartment, and store them. 139-2019.9 / 07 NXAIR M...
  • Page 140 Remove the partition (2) from the switching-device compartment, and store it. Remove the bolted joint (3) at the 3 connecting cables from the cable connections to the insulating bushings for the removable voltage transformers. Remove the bolting elements, and store them. NXAIR M 139-2019.9 / 07...
  • Page 141 Remove the bushing plate with bushings (5) from the switching-device compartment, and store it. Fig. 213: Switching-device compartment prepared for cable installation from the front  The connection compartment is accessible through the switching-device compartment. 139-2019.9 / 07 NXAIR M...

  • Page 142: Accessing The Connection Compartment Through The Rear

    Operating Instructions with order number 139-2021.9. HINT Hereafter, the disassembly of those parts is described, which are later assembled again at the same place. Store disassembled parts and bolting material carefully, and keep them available for later reuse. 139-2019.9 / 07 NXAIR M...

  • Page 143: Accessing The Connection Compartment Through The Rear Side Of The Panel

    Access to the connection compartment through the rear side of the panel is described hereafter by the example of a 4-panel arrangement with 48 bolted joints size M8x20. Fig. 215: 4-panel arrangement with rear wall and rear ledges closed (as an example) 139-2019.9 / 07 NXAIR M...
  • Page 144 Unscrew and remove the bolting material at the panel base:  4 bolts M8x20 with contact washers (5) To remove the rear wall, lift it and pull it away using the handle (4). Store the rear wall. NXAIR M 139-2019.9 / 07...
  • Page 145 Accessing the connection compartment through the rear Fig. 217: Removing the rear wall (4) Rear wall with handle (5) Bolts to remove  Access to the connection compartment through the rear side is given. 139-2019.9 / 07 NXAIR M...

  • Page 146: Accessing The Connection Duct Through The Rear Side Of The Panel

    Fig. 218: Position indicator on high-voltage door Remove the connecting elements from the horizontal ledge (3):  12 / 14 bolts M8x20 with contact washers Remove the horizontal ledge, and store it together with the associated connecting elements. NXAIR M 139-2019.9 / 07...
  • Page 147 4 / 5 bolts M8x20 with contact washers To remove, pull the upper rear wall (4) downwards by the handle. Store the rear wall.  Access to the connection duct through the rear side is given. 139-2019.9 / 07 NXAIR M...

  • Page 148: Electrical Connections

    Vaseline; then mount the connecting elements again. Remove the nuts M8 with contact washers (3) for fixing the floor plates (4), take connecting elements and floor plates out of the panel, and store all. 139-2019.9 / 07 NXAIR M...

  • Page 149: 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. 221: Rubber sleeve for cable, for example 139-2019.9 / 07 NXAIR M...

  • Page 150: Use Of Cable Lugs

    2 plain washers size 12 acc. to ISO 7093  2 conical spring washers 12  1 nut M12 Connecting elements per phase:  1 bolt M16 Bolt size M16  2 conical spring washers 16  1 nut M16 NXAIR M 139-2019.9 / 07...

  • Page 151: 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 139-2019.9 / 07 NXAIR M...

  • Page 152: 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 153: Dimensions Of Single-Core Cables

    Diameter of cable sealing end max. 60 mm Length from cable sealing up to and including heat- max. 500 mm shrinkable splitting cap Length of cable sealing end, incl. cable lug max. 300 mm max. 240 mm² Cable cross-section 139-2019.9 / 07 NXAIR M...
  • Page 154 Fig. 224: Dimension of three-core cable, view from the rear side of the panel Length of cable sealing end, including cable lug Length of cable sealing end up to and including heat-shrinkable splitting cap Diameter of cable sealing end NXAIR M 139-2019.9 / 07...

  • Page 155: Assembly Of Cable Sealing Ends For Single-Core Cables

    (viewed from the access to the connection compartment). Fig. 225: Connection compartment with connection for 1 cable per phase (example) Cable connection Cable clamp Floor plate with rubber sleeves Earth connections, connection bolt for earth connection size M12x35 Cable bracket 139-2019.9 / 07 NXAIR M...
  • Page 156 Fig. 226: Connection compartment with connections for 2 cables per phase (example) Cable connection Cable clamp Floor plate with rubber sleeves Earth connections, connection bolt for earth connection size M12x35 Cable bracket Surge arrester (optional) Voltage transformer (optional) NXAIR M 139-2019.9 / 07...
  • Page 157 Damage to the switchgear panels The panel connections in the connection compartment must all be equipped with cable sealing ends. To coordinate a different procedure, please contact the regional Siemens representative. Fig. 227: Connection compartment with connections for 3-4 cables per phase...

  • Page 158: Assembly Of Cable Sealing Ends For Three-Core Cables

    When a zero-sequence current transformer is installed, a fault current may arise through the earth connection. Lead the earthing cable back through the cable clamp and the zero- sequence current transformer, and connect it to the earthing busbar. NXAIR M 139-2019.9 / 07...
  • Page 159 (1) cable connection point, (2) cable lug, (3) cable sealing end, (4) earth connections, connection bolt for earth connection size M12x35, (5) cable clamp at the cable bracket, (6) deep bottom pan, (7) heat- shrinkable splitting cap 139-2019.9 / 07 NXAIR M...
  • Page 160 Procedure Install the deep bottom pan in the connection compartment according to the stipulations in the information drawings NXAIR M, order number 139-2084.9. Cut an opening into the floor plates that fits the diameter of the cable. Lay the cable through the opening in the floor plates.

  • Page 161: Connecting Control Cables

    The bus wire is the electrical connection from panel to panel. Clamp or plug bus wires into the bus wire terminal block in the low-voltage compartment. Fig. 231: Inside view of the low-voltage compartment with terminal block  Control cables and bus wires are connected. 139-2019.9 / 07 NXAIR M...

  • Page 162: 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. 139-2019.9 / 07 NXAIR M...

  • Page 163: Installing The Vertical Partition In The Switching-Device Compartment

    To fasten the partition, always screw in all bolts all around up to the end of the thread. In addition to these instructions, an instruction label on the vertical partition informs about safe fastening of the partition: Fig. 232: Instruction label on the partition 139-2019.9 / 07 NXAIR M...
  • Page 164 To fix the protection plate of the switching-device compartment (1), tighten the nuts (5) hand- tight.  4 nuts M8 with contact washers Tighten the fixing bolts (5) with a tightening torque of 25 Nm. NXAIR M 139-2019.9 / 07...

  • Page 165: Installing The Vertical Partition And The Ventilation Duct In The Switching-Device Compartment

    The metal parts of the ventilation duct and the vertical partition may have sharp edges. Put on personal protective equipment. CAUTION High weight The ventilation duct is heavy. The ventilation duct must absolutely be lifted by 2 persons. Put on personal protective equipment. 139-2019.9 / 07 NXAIR M...
  • Page 166 4 nos. nuts size M8 with contact washers  Vertical partition and associated bolting material available:  16 bolts M8x20 with contact washers and plain washers size 8 acc. to ISO 7093  Ventilation duct and associated bolting material available NXAIR M 139-2019.9 / 07...
  • Page 167 Fix the protection plate (1) by bolting the nuts (5) hand-tight:  4 nos. nuts size M8 with contact washers Tighten the fixing nuts (5) with torque 25 Nm. Fig. 237: 4 bolted joints on protection plate of switching-device compartment 139-2019.9 / 07 NXAIR M...
  • Page 168 Set the ventilation duct down centrally on the base frame of the panel. The side of the ventilation duct holding the air guide (1) must adjoin to the vertical partition. Fig. 241: Ventilation duct set down centrally on the base frame of the panel NXAIR M 139-2019.9 / 07...
  • Page 169 Fig. 243: 6 lateral bolted joints on partition and base frame Fasten the upper bolts size M8x20 with contact washers at the vertical partition hand-tight. Tighten the bolts with torque 25 Nm. Fig. 244: 3 bolted joints on partition 139-2019.9 / 07 NXAIR M...
  • Page 170 Tighten the bolts with torque 25 Nm. Proceed in the same way on the other side. Fig. 246: Bolts for fixing the air guide  The vertical partition and the ventilation duct are installed. NXAIR M 139-2019.9 / 07...

  • Page 171: Installing The Bushing Plate, The Vertical Partition And The Voltage Transformer Compartment In The Switching-Device Compartment

    / bushing plate. To fasten the partition / bushing plate, always assemble all bolted joints, and screw them in up to the end of the thread. 139-2019.9 / 07 NXAIR M...
  • Page 172 6 bolts M8x20 with contact washers and plain washers Tighten the bolts with torque 25 Nm. Fig. 247: 6 bolted joints on bushing plate with bushings Fasten the 3 connecting cables (8) for the removable voltage transformers at the cable connections. NXAIR M 139-2019.9 / 07...
  • Page 173 Insert the protection plate of the switching-device compartment (1), and fasten with 4 nos. nuts M8 with contact washers. Tighten the nuts with torque 25 Nm. Fig. 250: 4 bolted joints on protection plate of switching-device compartment 139-2019.9 / 07 NXAIR M...
  • Page 174 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 175: Installing The Rear Wall Of The Connection Compartment

    Possible malfunctioning and damage to the panels caused by foreign objects. Before closing the connection compartment, remove all foreign objects from the connection compartment, e.g.:  Tools  Unused installation material  Packing material  Cleaning material 139-2019.9 / 07 NXAIR M...
  • Page 176 1 horizontal ledge and associated 8 bolts M8x25 with contact washers and plain washers  2 vertical ledges and a total of 28 bolts M8x20 with contact washers  4 bolts M8x20 with contact washers for fixing the rear wall to the panel base NXAIR M 139-2019.9 / 07...
  • Page 177 8 bolts M8x25 with contact washers and plain washers Tighten the bolts with torque 25 Nm. Install one of the vertical ledges (5). Fix it by screwing the bolts in hand-tight:  14 bolts M8x20 with contact washers 139-2019.9 / 07 NXAIR M...

  • Page 178: Installing The Rear Walls On The Connection Duct

    The rear wall is installed on the connection compartment. 13.5 Installing the rear walls on the connection duct CAUTION High weight The upper rear wall is heavy. Remove the upper rear wall absolutely with 2 persons. NXAIR M 139-2019.9 / 07...
  • Page 179 Fix the rear wall by screwing the lower bolts in hand-tight:  4 / 6 nos. bolts M8x20 with contact washers (6) Insert the upper rear wall (2) at the rear side of the panel and push it up using the handle. 139-2019.9 / 07 NXAIR M...
  • Page 180 12 / 14 nos. bolts M8x20 with contact washers and plain washers size 8 acc. to ISO 7093 with the bolt fixing in the area of the vertical ledges Tighten all bolts with torque 25 Nm.  The rear walls are installed on the connection duct. NXAIR M 139-2019.9 / 07...

  • Page 181: Final Assembly Work

    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. NOTICE Cleaning Use vacuum cleaners and dry, lint-free cloths. 139-2019.9 / 07 NXAIR M...

  • Page 182: Tightening Torques And Control Tightening Torques For Bolted Joints

    In the pressure relief duct  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 M 139-2019.9 / 07...

  • Page 183: 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, order number 139-2021.9. 139-2019.9 / 07 NXAIR M...

  • Page 184: Checking The Withdrawable Part On The Service Truck

    14.10 Checking the withdrawable part on the service truck Remove foreign objects. For cleaning the circuit-breaker, see separate operating instructions for circuit- breaker 3AE. 14.11 Checking the service truck Remove foreign objects. Clean the service truck. NXAIR M 139-2019.9 / 07...

  • Page 185: Checking And Completing Protection Against Adverse Environmental Influences (Protection Against Corrosion)

    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. 14.15 Installation report After erecting the switchgear, fill in the installation report according to chapter 19 and send it to the address given in the installation report.

  • Page 186: Installation Of Withdrawable Parts

    Remove 2 locking bolts of the solenoid interlock at the withdrawable part of the circuit- breaker panel or the disconnecting panel. Fig. 262: Front view of withdrawable circuit-breaker  The solenoid interlocks in the operating mechanism for withdrawable parts are now ready for operation. NXAIR M 139-2019.9 / 07...

  • Page 187: 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 188: 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. 16.2 Drying dampness If the panels become damp by condensation or high humidity, e.g. prevailing during erection, they must be dried.

  • Page 189: Test Operation

    By means of test operations, correct operation of the panels is verified before commissioning without being endangered by operational high voltage. DANGER Electric shock Touching live parts causes electric shock. Do not switch on operational high-voltage during test operation! 139-2019.9 / 07 NXAIR M...
  • Page 190 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 from test position to service position and back five times. At the same time, check whether the associated positions of the withdrawable part are displayed correctly at the panel and, if applicable, in the control room.

  • Page 191: Switching On Operational High Voltage

    Connect the incoming feeder to the busbar. To do this, rack the withdrawable part to service position and close the circuit-breaker, see Operating Instructions with order number 139-2021.9.  The busbar of the panels is now connected to operational high voltage. 139-2019.9 / 07 NXAIR M...
  • Page 192 Verify phase coincidence of the respective incoming feeder and the busbar. 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 M 139-2019.9 / 07...

  • Page 193: Customer Support

    For further support, contact the Siemens after-sales service. 17.2 Repairs Repairs are carried out by trained Siemens technicians, who arrive equipped with original spare parts for the switchgear. 17.3 Before you call To help us deal with your query more quickly, make sure that the following information is at hand: ...

  • Page 194: 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 195: Installation Report

    Installation report 19 Installation report Installation report for air-insulated switchgear Type: NXAIR M Customer: Factory ref. no.: NXAIR Switchgear type Number of panels Rated voltage U Rated current of busbar Rated short-time withstand current I Control voltage Rated voltage motor operating mechanism...
  • Page 196 Tulip contacts at the withdrawable parts undamaged? Tulip contacts greased with a thin film of Molykote® Longterm 2 plus? Withdrawable parts coded according to the withdrawable part specification of the complete switchgear? Withdrawable parts cleaned? NXAIR M 139-2019.9 / 07...
  • Page 197 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? Position signaling tested for: Circuit-breaker? "Circuit-breaker spring charged"? Earthing switch in connection compartment? 139-2019.9 / 07 NXAIR M...
  • Page 198 Earthing via earthing bolt at the transformer? 10.6 Earthing at terminal strip completed? 10.7 Insulation test carried out on the non-fuse-protected wiring up to the open MCB? 10.8 Voltage transformer circuits tested? 10.9 Damping resistor connected in open delta winding? NXAIR M 139-2019.9 / 07...
  • Page 199  Do not perform dielectric test at test voltages exceeding the ratings of the tested equipment. High-voltage tests acc. to IEC 62271 Part 200 Clause 7.105 High-voltage test performed and reported in attached document? Annex: 139-2019.9 / 07 NXAIR M...
  • Page 200 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 Remarks: ....................................................Responsible for installation / commissioning: Signature of tester: Name: Department: Telephone: Date: City: NXAIR M 139-2019.9 / 07...

  • Page 201: Index

    Connection duct High-voltage test ..........199 accessing through the rear ......145 Hint ............... 3 installing the rear wall ........178 Contact partner, service ........193 Installation report ..........195 Control cables, connecting ....... 160 139-2019.9 / 07 NXAIR M...
  • Page 202 Voltage transformer compartment installing............171 Rear wall removing ............138 installing ..........175, 178 removing ..........142, 145 Warning ..............3 Repairs .............. 193 Wiring duct cover ..........99 Replacement of panels and components ..194 Withdrawable parts, installation ......186 NXAIR M 139-2019.9 / 07...
  • Page 203 Imprint Siemens AG Energy Management Medium Voltage & Systems Switchgear Factory Frankfurt Carl-Benz-Str. 22 D-60386 Frankfurt © Siemens AG 2018...

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