ContentsFor your safety! 11. Foreword 22. General description 33. Operating principle 44. Identification and designation 55. Factory test and accompanyingdocumentation 66. Characteristics 77. Installation 118. Putting into service 169. DCBreak version installed in a functionalenclosure 2010. Disposal 2511. Customer Service 2612. Maintenance 27—For your safety!• Make sure that the installation room (spaces,divisions and ambient) is suitable for theelectrical apparatus.• Check that all the installation, putting into serviceand maintenance operations are carried out byqualified personnel with suitable knowledge ofthe apparatus.• To ensure that the installations are built inaccordance with the rules of good workingpractice and safety in the work place, make surethat the regulatory and legal requirements arecomplied with during installation, putting intoservice and maintenance.• Strictly follow the information given in thisinstruction manual.• Check that the rated performance of theapparatus is not exceeded during service.• Check that the personnel operating the apparatushave this instruction manual to hand as well as thenecessary information for correct intervention.• Pay special attention to the notes highlighted inthe manual by the following symbol:Responsible behavior safeguards yourown and others' safety!Please contact the ABB AssistanceService for any further requirements.—D I S T R I B U T I O N S O LU T I O N SDCBreakRolling Stock High Speed Direct Current circuit breakerInstructions for installation, service and maintenance900 V - 1500 A - 30 kA; 1800 V - 1500 A - 30 kAFree standing and in box application