Introduction 1 Description 2 SENTRON Applications 3 Protection devices 3WA Air Circuit Breakers Accessories 4 Inspection and maintenance 5 Technical specifications 6 Integration in power distribution equipment 7 Troubleshooting 8 Disposal 9 Appendix A ESD guidelines B List of abbreviations C 3WA Air Circuit Breakers Equipment Manual 05/2021 92310000002-03
Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger.
Table of contents 1 2 Introduction ......................................................................................................................................... 15 1.1 Scope of validity of this document...................................................................................... 15 1.2 Target readers of this documentation ................................................................................. 15 1.3 Technical Support .....................................................
Table of contents 4 2.3.5.5 2.3.5.6 2.3.5.7 2.3.5.8 2.3.5.9 2.3.5.10 2.3.5.11 2.3.6 2.3.7 Neutral protection N .......................................................................................................... 53 Ground-fault alarm ............................................................................................................ 54 Ground-fault protection GF ................................................................................................
Table of contents 3 4 2.7.2.8 2.7.2.9 2.7.2.10 2.7.2.11 2.7.2.12 2.7.3 Operator controls............................................................................................................. 116 Commissioning ................................................................................................................ 118 Access protection functions.............................................................................................. 122 Resetting to factory settings ...................
Table of contents 6 4.3.3.1 4.3.3.2 4.3.3.3 4.3.3.4 4.3.4 4.3.4.1 4.3.4.2 4.3.4.3 4.3.5 4.3.5.1 4.3.5.2 4.3.5.3 4.3.5.4 4.3.6 4.3.6.1 4.3.6.2 4.3.6.3 4.3.6.4 4.3.7 4.3.7.1 4.3.7.2 4.3.7.3 4.3.8 4.3.8.1 4.3.8.2 4.3.8.3 4.3.9 4.3.9.1 4.3.9.2 4.3.9.3 4.3.9.4 4.3.10 4.3.10.1 4.3.10.2 4.3.10.3 Description ...................................................................................................................... 168 Technical specifications ...........................................................
Table of contents 4.4.5 4.4.5.1 4.4.5.2 4.4.5.3 4.4.5.4 4.4.6 4.4.6.1 4.4.6.2 4.4.6.3 4.4.6.4 Trip alarm switch ............................................................................................................. 202 Description ...................................................................................................................... 202 Technical specifications.................................................................................................... 202 Installation........
Table of contents 4.8.3 4.8.3.1 4.8.3.2 4.8.3.3 4.8.3.4 4.8.3.5 4.8.4 4.8.4.1 4.8.4.2 4.8.4.3 4.8.4.4 4.8.5 4.8.5.1 4.8.5.2 4.8.5.3 4.8.6 4.8.6.1 4.8.6.2 4.8.6.3 4.8.6.4 4.8.7 4.8.7.1 4.8.7.2 4.8.8 4.8.8.1 4.8.8.2 4.8.8.3 4.8.8.4 4.8.9 4.8.9.1 4.8.9.2 4.8.10 4.8.10.1 4.8.10.2 4.8.10.3 4.8.10.4 4.8.11 4.8.11.1 4.8.11.2 4.8.11.3 4.8.11.4 4.8.12 4.8.12.1 4.8.12.2 4.8.12.3 4.8.12.4 4.8.13 4.8.13.1 8 Local electric close .........................................................................................
Table of contents 4.8.13.2 4.8.13.3 4.8.13.4 Installation....................................................................................................................... 276 Activation / override ......................................................................................................... 279 Article number ................................................................................................................. 279 4.9 4.9.1 4.9.1.1 4.9.1.2 4.9.1.3 4.9.2 4.9.3 4.9.4 4.9.5 4.9.
Table of contents 10 4.11.2 4.11.2.1 4.11.2.2 4.11.2.3 4.11.3 4.11.3.1 4.11.3.2 4.11.3.3 4.11.4 4.11.4.1 4.11.4.2 4.11.4.3 Voltage tap module VTM.................................................................................................. 316 Description ...................................................................................................................... 316 Removal / installation.......................................................................................................
Table of contents 5 6 4.16.1.1 4.16.1.2 4.16.1.3 4.16.1.4 4.16.2 4.16.2.1 4.16.2.2 4.16.2.3 Description ...................................................................................................................... 344 Technical specifications.................................................................................................... 345 Installation....................................................................................................................... 346 Article number .
Table of contents 12 6.1.9 6.1.10 6.1.11 6.1.12 6.1.13 6.1.14 6.1.15 6.1.16 6.1.17 6.1.18 6.1.19 Digital input / output module IOM230 .............................................................................. 383 Spring charging motor ..................................................................................................... 384 Motor disconnect switch .................................................................................................. 384 Auxiliary switch ....................
Table of contents 7 8 9 A 6.3.3.5 6.3.4 IT network capability ........................................................................................................ 458 Other properties .............................................................................................................. 459 6.4 Ambient conditions.......................................................................................................... 460 6.5 Installation altitudes........................................
Table of contents B ESD guidelines ................................................................................................................................... 509 B.1 C 14 Electrostatic sensitive devices (ESD) ................................................................................. 509 List of abbreviations ..........................................................................................................................
Introduction 1.1 1 Scope of validity of this document This equipment manual is a reference manual for technical information that users will need to configure, connect, and operate the 3WA air circuit breakers and their accessories. 1.2 Target readers of this documentation The information contained in this manual is provided for the benefit of: • Planners • Power distribution equipment manufacturers/builders • Commissioning engineers • Users • Maintenance personnel 1.
Introduction 1.4 Reference documents 1.4 Reference documents For more information, refer to the following documents: Title 3WA Air Circuit Breaker Communication System Manual (https://support.industry.siemens.com/cs/ww/en/view/109792368) 3WA Air Circuit Breakers Catalog (https://support.industry.siemens.com/cs/ww/en/view/109781806) Catalog LV 10 - Low-Voltage Power Distribution and Electrical Installation Technology Catalog (https://support.industry.siemens.
Introduction 1.6 Safety instructions 1.6 Safety instructions DANGER Hazardous voltage Will cause death, serious personal injury, or equipment damage. During operation, parts of the device or system are carrying hazardous electrical voltage. Improper handling of the device or system can result in death or serious injury, as well as significant material damage. • Inspection and maintenance may only be performed by qualified personnel.
Introduction 1.6 Safety instructions 1.6.1 Security information Siemens provides products and solutions with industrial security functions that support the secure operation of plants, systems, machines and networks. In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions constitute one element of such a concept.
Introduction 1.6 Safety instructions Certain OSS licenses require SIEMENS to make source code available, for example, the GNU General Public License, the GNU Lesser General Public License and the Mozilla Public License.
Introduction 1.7 Standards 1.
2 Description 2.1 Overview - applications and portfolio 2.1.1 Properties The 3WA circuit breaker is the new generation of air circuit breakers in the Siemens AG portfolio. It is based on the proven and robust design of its predecessor 3WL. The technical data of the 3WA circuit breaker mechanics and the portfolio have been extended as compared with 3WL, and the electronic components have been completely redeveloped.
Description 2.1 Overview - applications and portfolio • Integrated and shared communication concept with the 3VA molded case circuit breakers and the 7KM PAC measuring devices.
Description 2.1 Overview - applications and portfolio • Accessories are designed for the maximum service life of the circuit breaker. • Support by CAx files, EPLAN macros and Siemens tools simplifies planning and integration of the circuit breaker into the overall installation. 2.1.2 Portfolio of the 3WA1 circuit breaker The 3WA1 series comprises the circuit breakers • 3WA11: Size 1 • 3WA12: Size 2 • 3WA13: Size 3 The series covers breaking capacities up to 150 kA at 500 V AC. 2.1.
Description 2.1 Overview - applications and portfolio • Low inspection/maintenance effort – Only inspection required – No relubrication of moving parts in the circuit breaker – Parts only need to be replaced during maintenance if this is deemed necessary based on the inspection results. Accessory components are designed for the maximum specified service life of the circuit breaker under normal operating conditions.
Description 2.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2 Circuit breakers and non-automatic circuit breakers 2.2.1 Distinction between circuit breakers and non-automatic circuit breakers The 3WA can be used as a circuit breaker with electronic trip unit, but also as a non-automatic circuit breaker according to IEC 60947-2.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.2 Design 2.2.2.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.2.
Description 2.2 Circuit breakers and non-automatic circuit breakers Rated-current coding Guide frames and withdrawable circuit breakers are equipped with a rated-current coding as standard. Rated-current coding ensures that only those circuit breakers whose guide frames are designed for the circuit breakers can be inserted into the guide frame.
Description 2.2 Circuit breakers and non-automatic circuit breakers For service purposes, the sliding covers can be opened and fixed manually with the aid of the shutter levers. Example: opening the lower sliding covers Light pressure on the shutter lever releases the fixation. The shutter levers return to the initial position and close the sliding covers. NOTICE Damage to the shutter If the withdrawable circuit breaker is inserted while the shutter levers are fixed, the shutter may become damaged.
Description 2.2 Circuit breakers and non-automatic circuit breakers Locking provision for the shutter The locking provision secures the shutter levers with padlocks in different positions. This protects the openings defined by the shutter lever position against unauthorized alteration. • Locking in completely closed shutter position • Locking with shutter open at the bottom Before inserting the withdrawable circuit breaker, the padlocks must be removed from the shutter levers.
Description 2.2 Circuit breakers and non-automatic circuit breakers Locking provision for racking rails The locking provision prevents the insertion of a circuit breaker in the guide frame. For this purpose, the racking rails are locked with padlocks so that they cannot be pulled out again. Activation In order to activate the locking provision, once the circuit breaker has been removed, the racking rails are completely inserted into the guide frame and secured in this position with padlocks.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.2.3 Secondary disconnect terminals Description Internal electrical accessory components such as the closing coil receive their supply voltage via the secondary disconnect terminals. A maximum of four secondary disconnect terminal blocks are available for size 1 circuit breakers and up to five for sizes 2 and 3.
Description 2.2 Circuit breakers and non-automatic circuit breakers Laying of cables NOTICE Damage to cables Cables in impermissible areas can be damaged. Route cables outside areas shown below. (1) (2) 34 Arcing space If arc chute covers are provided, the auxiliary conductors must not be laid on these covers.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.3 Circuit breaker identification 2.2.3.1 Rating and accessory labels The rating and accessory labels provide identification of the circuit breaker. It contains the article number, equipment details, and further information on the circuit breaker.
Description 2.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.3.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.4 Operation 2.2.4.1 Charging the stored-energy spring To be able to close the circuit breaker, the stored-energy spring must be charged. Manually charging the stored-energy spring F Actuating force n Number of strokes (1) Stored-energy spring is charged 1. Fully grasp the charging handle. 2. Execute nine strokes evenly and completely to the stop.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.4.2 Closing and opening Note The minimum time difference between ON and OFF command should be at least 100 ms. Conditions for ready-to-close status The conditions for the breaker’s ready-to-close status can be found in Chapter Commissioning checklist (Page 43). The circuit breaker is ready for closing when the READY window displays OK.
Description 2.2 Circuit breakers and non-automatic circuit breakers Switching on and off with spring charging motor and motor disconnect switch Remote switching Remote switching of the circuit breaker is possible as an option: • • Switching on takes place via the closing coil. • Switching off takes place via the shunt trips. Information on these components can be found in Chapter Closing coil, shunt trip, undervoltage release (Page 156).
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.4.3 Racking the circuit breaker in the guide frame The withdrawable circuit breaker can be moved to three positions by means of the racking handle. The current position is indicated by the position indicator on the circuit breaker, see Chapter Circuit breakers (Page 27).
Description 2.2 Circuit breakers and non-automatic circuit breakers Racking the circuit breaker NOTICE Material damage due to over-rotation of the racking handle Over-rotation of the racking handle beyond its end stop can damage the racking mechanism. Once the end stop is reached, the racking handle must be rotated counterclockwise to the rack-in position.
Description 2.2 Circuit breakers and non-automatic circuit breakers 2.2.4.4 Commissioning checklist Checks and work to be carried out Before commencing work on the device, observe the safety instructions in Chapter Safety instructions (Page 17). 1. Open the circuit breaker and discharge the stored-energy spring. 2. Pull out the racking handle (for withdrawable circuit breakers). 3. Move the circuit breaker to the test position (for withdrawable circuit breakers). 4.
Description 2.3 Protection system 2.3 Protection system 2.3.1 General description of function The protection system of the 3WA circuit breaker consists of: • Current sensors for measurement The current sensors installed in the 3WA circuit breaker feature a Rogowski coil and an energy core. The measured signal is provided by the Rogowski coil. The Rogowski coil is used as a component in electronic measuring devices to measure alternating current.
Description 2.3 Protection system 2.3.2 Option plug The option plug determines the current rating and the basic protective functions of the electronic trip unit of the 3WA circuit breaker. (1) Article number (on top, not visible when plugged in) (2) Current rating (3) Basic protective functions (4) Country of manufacture (on the bottom side, not visible when plugged in) The option plug can be replaced to adapt the circuit breaker to changing requirements.
Description 2.3 Protection system Changing the current rating For the three sizes of the 3WA circuit breaker, the rated current In can be changed to the values given in the table below by means of the option plug. The selected value should correspond to the rated current of the power distribution system and must not exceed the maximum rated current of the circuit breaker In max (see circuit breaker accessory label).
Description 2.3 Protection system 2.3.3 Guideline for setting the protection parameters The protection parameters of the electronic trip unit depend on the technical environment (e.g. power distribution equipment and applications) and the type of equipment to be protected. Therefore, the protection settings must be calculated according to the applicable regulations and the electronic trip unit must be set with these calculated parameters.
Description 2.3 Protection system SIMARIS curves The Siemens software tool SIMARIS curves can be used to display the time-current characteristic for one or more devices. For more information on SIMARIS curves, refer to the Internet (https://www.siemens.com/simaris). 2.3.5 Description of the protective functions 2.3.5.