Siemens NXAIR M User Manual (English)

Questions and Answers:

A
Amy PalmerAug 16, 2025
What to do if the Siemens NXAIR M Industrial Equipment circuit-breaker cannot be closed?
- E
  Emily FoxAug 16, 2025
  If the circuit-breaker cannot be closed, it may be due to several reasons: * The racking crank for moving the withdrawable part is inserted: Remove the racking crank. * The withdrawable part is in an intermediate position: Rack the withdrawable part to the service or test position. * The spring energy store is not charged: Wait for 15 seconds (if motor-driven) or charge it manually. * The undervoltage release is not energized: Activate the undervoltage release.
F
fsimmonsAug 22, 2025
What to do if the high-voltage door of Siemens NXAIR M cannot be opened?
- H
  Hannah ParkerAug 22, 2025
  If the high-voltage door cannot be opened, it is likely that the withdrawable part is in the service position. Rack the withdrawable part to the test position to resolve this.
P
perrybrianAug 26, 2025
What causes the actuating opening for the feeder earthing switch on my Siemens NXAIR M to not open?
- D
  Drew CastilloAug 26, 2025
  The actuating opening for the feeder earthing switch may not open due to the following reasons: * The racking crank for moving the withdrawable part is inserted. Remove the racking crank. * The general panel interlock is active. Observe the general panel interlock. * The operating slide for opening the actuating opening is locked. Open the padlock.
J
Joshua PowellAug 28, 2025
How to fix Siemens NXAIR M Industrial Equipment when the withdrawable part cannot be fully pushed into the panel and interlocked?
- C
  Christine MillerAug 28, 2025
  If the withdrawable part cannot be fully pushed into the panel and interlocked, ensure that the positions of the feeder earthing switch operating mechanism (withdrawable part) and the feeder earthing switch (panel) are aligned. Bring them into alignment if they are not.
M
Mark GrimesAug 31, 2025
Why the operating lever cannot be inserted in my Siemens NXAIR M Industrial Equipment?
- B
  brittanysmithAug 31, 2025
  The operating lever may not be able to be inserted if the withdrawable part is in the service position. Rack the withdrawable part to the test position; if required, switch the circuit-breaker to the OPEN position.
S
sarahandrewsSep 3, 2025
What to do if the high-voltage door of Siemens NXAIR M Industrial Equipment cannot be closed?
- Z
  zbridgesSep 3, 2025
  If the high-voltage door cannot be closed, ensure that the low-voltage connector is plugged in. Plug in the low-voltage connector.
M
michaelwatsonSep 6, 2025
Why isn't the spring energy store charging automatically in my Siemens NXAIR M?
- K
  Kimberly JohnsSep 6, 2025
  If the spring energy store is not charging automatically, it could be due to a lack of auxiliary voltage. Apply auxiliary voltage or charge the spring manually.
A
Amanda PowellSep 9, 2025
What prevents the actuating opening for the busbar earthing switch from opening on my Siemens NXAIR M?
- J
  Joseph SolisSep 9, 2025
  The actuating opening for the busbar earthing switch may not open if: * The general panel interlock is active: Observe the general panel interlock. * The operating slide for opening the actuating opening is locked: Open the padlock. * The operating slide for opening the actuating opening is interlocked by the electromagnetic interlock: Request external release.
R
riveramaryAug 19, 2025
Why can I insert the double-bit key, but not turn it to the right for releasing the withdrawable part in my Siemens NXAIR M?

Siemens NXAIR M Specifications

General

Rated voltage	Up to 24 kV
Rated current	Up to 4000 A
Rated short-circuit breaking current	Up to 50 kA
Insulation medium	Air
Breaking Capacity	Up to 50 kA
Operating Temperature	-5°C to +40°C
Storage Temperature	-25°C to +55°C
Arc fault classification	IAC AFLR
Protection Functions	Overcurrent, earth fault
Standards	IEC 62271-200
Humidity	Up to 95% (non-condensing)
Type	Air-insulated medium-voltage switchgear

Summary

Safety Instructions

General Instructions

General safety and operational guidelines for switchgear.

Five Safety Rules of Electrical Engineering

Essential safety principles for electrical work to prevent hazards.

Personal Protective Equipment (PPE)

Specifies necessary protective gear for operating switchgear with internal arc classification.

Due Application

Describes the intended use and types of NXAIR M switchgear according to standards.

Technical Data

Complete Switchgear

Lists the technical specifications for the complete switchgear system.

Basic Prescriptions and Standards

Outlines the relevant IEC/EN standards the switchgear complies with.

Panel Dimensions

Provides dimensional data (width, height, depth) for various panel types.

Operating Conditions

Specifies limit values for ambient air temperature and site altitude.

Panel Design

Basic Design Circuit-breaker Panel, Single-Busbar System

Sectional view and description of a basic circuit-breaker panel for single-busbar systems.

Basic Design Circuit-breaker Panel with HV HRC Fuse

Sectional view and description of a circuit-breaker panel with HV HRC fuse.

Basic Design Circuit-breaker Panel, Double-Busbar System

Sectional view of a circuit-breaker panel designed for double-busbar systems.

Interlocks

Mechanical Interlocks for Single-Busbar System

Details mechanical interlocks and their internal preconditions for single-busbar systems.

Mechanical Interlocks for Double-Busbar System

Details mechanical interlocks and their additional preconditions for double-busbar systems.

Additional Electromagnetic Interlocks (Optional)

Describes optional electromagnetic interlocks and their preconditions.

Additional Key-Operated Interlock (Optional)

Details optional key-operated interlocks and their preconditions.

Accessories

Operating Tools

Illustrates and names various tools used for operating the switchgear.

Service Truck

Information and safety precautions regarding the use of service trucks.

Customer Support

Service

Information on how to obtain support for the switchgear.

Before You Call

Information to have ready when contacting customer support for queries.

Service Contact

Contact details for the Energy Customer Support Center.

Operating the Circuit-Breaker Panel

Control Elements at the Front Side of the Panel

Identifies and explains the control elements located on the front of the panel.

Position Indicators Visible on High-Voltage Door

Describes the visual position indicators for different switchgear states.

Opening the High-Voltage Door

Step-by-step instructions and safety warnings for opening the high-voltage door.

Closing the High-Voltage Door

Step-by-step instructions and safety warnings for closing the high-voltage door.

Operating the Disconnecting Panel

Control Elements at the Front Side of the Panel

Identifies control elements on the front of the disconnecting panel.

Racking the Withdrawable Disconnector Link

Instructions and warnings for racking the withdrawable disconnector link.

Operating the Metering Panel

Control Elements at the Front Side of the Panel

Identifies control elements on the front of the metering panel.

Replacing Protection Fuse-Links

Instructions for replacing protection fuse-links in the metering part.

Operating the Circuit-Breaker Panel with HV HRC Fuse

Control Elements at the Front Side of the Panel

Identifies control elements on the front of the HV HRC fuse panel.

Replacement of HV HRC Fuse-links

Instructions for replacing HV HRC fuse-links, including safety precautions.

Operating the Circuit-Breaker Panel for Double-Busbar System

Control Elements at the Front Side of the Panel

Identifies control elements for the double-busbar circuit-breaker panel.

Racking the Withdrawable Circuit-Breaker

Details interlocks and procedures for racking in double-busbar systems.

Operating the Removable Voltage Transformers

Racking the Removable Voltage Transformers to Service Position

Procedure for racking removable voltage transformers to service position.

Racking the Removable Voltage Transformers to Test Position

Procedure for racking removable voltage transformers to test position.

Taking the Removable Voltage Transformers out of the Panel

Steps to safely remove removable voltage transformers from the panel.

Inserting the Removable Voltage Transformers in a Panel

Steps to safely insert removable voltage transformers into the panel.

Verifying Safe Isolation from Supply

Application of Voltage Indicators

Importance and application of voltage indicators for safe isolation verification.

LRM System Overview

Overview of the LRM system and its indications on LRM-ST.

Verifying LRM-ST Voltage Indicator

Procedures for verifying the function of the LRM-ST voltage indicator.

Verifying Safe Isolation from Supply with the LRM Device System

Steps for verifying safe isolation using the LRM device system.

Earthing and De-earthing the Busbar System

Earthing the Busbar System Manually

Manual procedure for earthing the busbar system.

De-earthing the Busbar System Manually

Manual procedure for de-earthing the busbar system.

Operating the Shutters

Operating the Shutter to the Busbar Compartment in the Switching-Device Compartment

Procedure for operating the shutter to the busbar compartment.

Operating the Shutter to the Connection Compartment in the Switching-Device Compartment

Procedure for operating the shutter to the connection compartment.

Accessing the Connection Compartment through the Front

Preparations Before Accessing the Connection Compartment

Safety preparations required before accessing the connection compartment.

Accessing the Connection Compartment through the Switching-Device Compartment

Steps to access the connection compartment via the switching-device compartment.

Installing the Vertical Partition in the Switching-Device Compartment

Procedure for installing the vertical partition in the switching-device compartment.

Accessing the Connection Compartment through the Rear

Accessing the Connection Compartment through the Rear Side of the Panel

Steps to access the connection compartment via the rear side of the panel.

Installing the Rear Wall on the Connection Compartment

Procedure for installing the rear wall on the connection compartment.

Accessing the Connection Duct through the Rear Side of the Panel

Steps to access the connection duct via the rear side of the panel.

Key-Operated Interlocks

Function and design of key-operated interlocks for circuit-breaker and disconnecting panels.

Key-Operated Interlocks for the Busbar Earthing Switch

Specific key-operated interlocks for the busbar earthing switch.

Fitting the Earthing Device

Design, Application and Inspection of the Earthing Accessories

Design, usage, and inspection guidelines for earthing accessories.

Connecting the Earthing Device

Procedure for connecting the earthing device to the panel.

Removing the Earthing Device

Procedure for safely removing the earthing device.

Panels with Motor Operating Mechanism Control

Overview of Functionality

Explains optional motor operating mechanism control for various functions.

Opening the Control Door

Procedure for opening the control door on the high-voltage door.

Closing the Control Door

Procedure for closing the control door on the high-voltage door.

Selecting Manual Operation for Racking

Steps to select manual operation for racking the circuit-breaker.

Panel Heater

Heater Versions

Describes available heater versions and mounting locations.

Mechanical Temperature Controller

Explains the function and design of the mechanical temperature controller.

Electronic Temperature and Humidity Controller

Describes the electronic temperature and humidity controller functions.

Service Information

General Maintenance

Ensures undisturbed operation through inspection and maintenance.

Time Schedule for Maintenance Measures

Recommended intervals for various maintenance measures.

Visual Inspection

Annual inspection procedure for panels and components.

Preventive Maintenance

Measures to prevent damage and ensure long-term functionality of the switchgear.

Trouble Shooting

Panels

Troubleshooting guide for common issues related to panels and interlocks.

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Siemens NXAIR M User Manual

Table of Contents

Questions and Answers:

Siemens NXAIR M Specifications

Summary

Safety Instructions

General Instructions

Five Safety Rules of Electrical Engineering

Personal Protective Equipment (PPE)

Due Application

Technical Data

Complete Switchgear

Basic Prescriptions and Standards

Panel Dimensions

Operating Conditions

Panel Design

Basic Design Circuit-breaker Panel, Single-Busbar System

Basic Design Circuit-breaker Panel with HV HRC Fuse

Basic Design Circuit-breaker Panel, Double-Busbar System

Interlocks

Mechanical Interlocks for Single-Busbar System

Mechanical Interlocks for Double-Busbar System

Additional Electromagnetic Interlocks (Optional)

Additional Key-Operated Interlock (Optional)

Accessories

Operating Tools

Service Truck

Customer Support

Service

Before You Call

Service Contact

Operating the Circuit-Breaker Panel

Control Elements at the Front Side of the Panel

Position Indicators Visible on High-Voltage Door

Opening the High-Voltage Door

Closing the High-Voltage Door

Operating the Disconnecting Panel

Control Elements at the Front Side of the Panel

Racking the Withdrawable Disconnector Link

Operating the Metering Panel

Control Elements at the Front Side of the Panel

Replacing Protection Fuse-Links

Operating the Circuit-Breaker Panel with HV HRC Fuse

Control Elements at the Front Side of the Panel

Replacement of HV HRC Fuse-links

Operating the Circuit-Breaker Panel for Double-Busbar System

Control Elements at the Front Side of the Panel

Racking the Withdrawable Circuit-Breaker

Operating the Removable Voltage Transformers

Racking the Removable Voltage Transformers to Service Position

Racking the Removable Voltage Transformers to Test Position

Taking the Removable Voltage Transformers out of the Panel

Inserting the Removable Voltage Transformers in a Panel

Verifying Safe Isolation from Supply

Application of Voltage Indicators

LRM System Overview

Verifying LRM-ST Voltage Indicator

Verifying Safe Isolation from Supply with the LRM Device System

Earthing and De-earthing the Busbar System

Earthing the Busbar System Manually

De-earthing the Busbar System Manually

Operating the Shutters

Operating the Shutter to the Busbar Compartment in the Switching-Device Compartment

Operating the Shutter to the Connection Compartment in the Switching-Device Compartment

Accessing the Connection Compartment through the Front

Preparations Before Accessing the Connection Compartment

Accessing the Connection Compartment through the Switching-Device Compartment

Installing the Vertical Partition in the Switching-Device Compartment

Accessing the Connection Compartment through the Rear

Accessing the Connection Compartment through the Rear Side of the Panel

Installing the Rear Wall on the Connection Compartment

Accessing the Connection Duct through the Rear Side of the Panel

Key-Operated Interlocks

Key-Operated Interlocks

Key-Operated Interlocks for the Busbar Earthing Switch

Fitting the Earthing Device

Design, Application and Inspection of the Earthing Accessories

Connecting the Earthing Device

Removing the Earthing Device

Panels with Motor Operating Mechanism Control