Step 1: Collecting all the project data 1.2 Operation and maintenance The checklist queries the necessary requirements for the switchgear assembly for the operation taking into account the qualifi cations of persons who require access to the respective areas or must operate equipment. 2. Operation by skilled persons (electricians) by unskilled person Doors/lids: opaque/without inspection pane transparent/with inspection pane _______________ For details, see HENSEL main catalogue or www.hensel-electric.de.
11 Operation by Electrician (skilled person) IP XXB Devices which must be operated by a qualifi ed electrician only, shall be installed behind separate doors or lids which can be opened with a tool only. Tool-operated areas for feeding-in, back-up fuse and outgoing terminals. Here, merely a qualifi ed electrician must have access! Electrically trained person IP XXB, see qualifi ed electrician Electro-technical unskilled person Selection of equipment for unskilled persons! Only installation devices such as series built-in equipment, fuses up to 63A, circuit-breakers and IT components permitted. IP XXC:
Protection against direct contact with hazardous live parts For distribution boards, IEC 61439-3 / EN 61439-3 requires special protective measures for areas to which unskilled persons have access: - Live parts should be covered with a protection cover. - Devices which may be operated by a qualifi ed electrician only, shall be installed behind separate lids or doors, which can be opened only with a tool. Hand-operation for the access areas of unskilled persons or use of hinged lids allowing easy control of equipment.
Devices operated Behind the door / lid Protection measures must be observed Doors / covers Lock available for retrofi tting Conversion kits for door or lid fasteners from hand to tool operation available