KRAUS & NAIMER ATEX Booklet

Maximal number of locks Padlock device U-bolt-Ø Number of locks 6 3 Cabel-Ø shield Shield clamp Type Ø min-max KG20-KG64 12-16 MAIN & MAINTENANCE SWITCHES Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T103/NL-EXBA KNBOX 11 kW 32 A KG32 T103/NL-EXBA KNBOX 15 kW 40 A KG41 T103/NL-EXBA KNBOX 20 kW 55 A KG64 T103/NL-EXBA KNBOX Without auxiliary contacts 7,5 kW 25 A KG20 T103/NL-EXB KNBOX 11 kW 32 A KG32 T103/NL-EXB KNBOX 15 kW 40 A KG41 T103/NL-EXB KNBOX 20 kW 55 A KG64 T103/NL-EXB KNBOX EMC-Model with auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T103/NL-EXBC *KNBOX 11 kW 32 A KG32 T103/NL-EXBC *KNBOX 15 kW 40 A KG41 T103/NL-EXBC *KNBOX 20 kW 55 A KG64 T103/NL-EXBC *KNBOX Note for EMC model: Maintenance Switches for EMC-compliant connection of Variable Frequency Drives (VFD) use shield clips. These clips are used to continue the cable shield circuit through the enclosure. The configuration of the Maintenance Switch between VFD and motor allows the use as Disconnector up to 400 Hz and as Load Switch at frequencies from 40 Hz to 100 Hz. Each Maintenance Switch has as standard 2 auxiliary contacts, 1 NC and 1 NO. Via the NO (20 ms leading) the VFD can be switched off before the main contacts of the switch open. For the rating of the switch please note that the motor may have approx.10 % higher charging rate due to the higher loss in VFD-operation e.g. a motor with 7,5 kW rating the motor current has to be determined with 16,7 A instead of 15,2 A. Maintenance and Safety switch acc. to EC ATEX- Directive 94/9/EG equipment group II, Category 2, Zone 21, Indication of field D Mechanical impact resistance 7J ATEX Maintenance & Safety Switches Zone 21 L1 T1 L2 T2 L3 T3 L1 T1 L2 T2 L3 T3 31 32 43 44 L1 T1 L2 T2 L3 T3 13 14 21 22 3 pole + 1NO/1NC EMC 3 pole + 1NO/1NC 3 pole IP RATING HANDLE OPTION ALSO INCLUDED SAFETY SPEC IP66 protection black and grey handle 2 x M25 ATEX cable glands , 2 x M32/M25 adaptors and 1 dummy plug M20 included 3 pole, 3 pole + 1 NO/NC 115 190 102 M32 M20 26 101 128 31 5,3 80 7