For free expert advice call our sales team: Free Phone 0800 736522 krausnaimer.com ATEX Maintenance & Safety Switches, ZONE 21 ATEX range
Kraus & Naimer Limited is part of the worldwide Kraus & Naimer since 2017. From the original workshop in Vienna, Kraus & Naimer has grown into a global company that today manufactures some 4.0 million switches per annum, has 900 employees worldwide and is represented in 62 countries. Renown as the market leader in cam switches, Kraus & Naimer has developed 400 switch types and an extensive range of modular optional extras and mounting units to meet the requirements of most all industries and applications. HL Naimer personally introduced K&N switches to Australia and New Zealand in the 1950's. The rapid uptake in both markets resulted in the establishment of wholly owned sales companies in 1958 and 1965 respectively. With a view to the future, in 1978 Kraus & Naimer built a fully resourced production facility in Wellington to service Australasia and Asia – all of these companies continue to flourish today. Please contact our dedicated sales people who understand applications and can offer efficient and economical solutions to customer requirements. www.krausnaimer.com e: sales-nz@krausnaimer.com Freephone: 0800 736522 Kraus & Naimer's Blue Line products are accepted and universally recognised for their quality and workmanship.
In industrial applications like dried fruit and animal foodstuff production, grain mills, woodworking, and powder coating plants for instance, inflammable coating powders will occur. These inflammable powders in combination with the aerial oxygen can cause an explosive atmosphere. Inflaming this atmosphere will evoke an explosion which can cause serious personal injury and damage of property. To avoid sparking while operating a maintenance switch, the switch has to meet high technical requirements. This brochure introduces our new Kraus & Naimer ATEX maintenance switches in the UK suitable for zone 21, including 3 to 4 pole switches up to 55 A and 6 pole switches up to 32 A. 3 ATEX range
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 ATEXDirective 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
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 Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T203/NL-EXRA KNBOX 11 kW 32 A KG32 T203/NL-EXRA KNBOX 15 kW 40 A KG41 T203/NL-EXRA KNBOX 20 kW 55 A KG64 T203/NL-EXRA KNBOX Without auxiliary contacts 7,5 kW 25 A KG20 T203/NL-EXR KNBOX 11 kW 32 A KG32 T203/NL-EXR KNBOX 15 kW 40 A KG41 T203/NL-EXR KNBOX 20 kW 55 A KG64 T203/NL-EXR KNBOX EMC-Model with auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T203/NL-EXRC *KNBOX 11 kW 32 A KG32 T203/NL-EXRC *KNBOX 15 kW 40 A KG41 T203/NL-EXRC *KNBOX 20 kW 55 A KG64 T203/NL-EXRC *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. 115 190 102 M32 M20 26 101 128 31 5,3 80 7 IP RATING HANDLE OPTION ALSO INCLUDED SAFETY SPEC IP66 protection red and yellow handle 2 x M25 ATEX cable glands , 2 x M32/M25 adaptors and 1 dummy plug M20 included Maintenance and Safety switch acc. to EC ATEXDirective 94/9/EG equipment group II, Category 2, Zone 21, Indication of field D Mechanical impact resistance 7J MAIN & MAINTENANCE SWITCHES ATEX Maintenance & Safety Switches Zone 21 3 pole, 3 pole + 1 NO/NC L1 T1 L2 T2 L3 T3 13 14 21 22 L1 T1 L2 T2 L3 T3 31 32 43 44 L1 T1 L2 T2 L3 T3 5 3 pole + 1NO/1NC EMC 3 pole + 1NO/1NC 3 pole
Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T104/NL-EXBA KNBOX 11 kW 32 A KG32 T104/NL-EXBA KNBOX 15 kW 40 A KG41 T104/NL-EXBA KNBOX 20 kW 55 A KG64 T104/NL-EXBA KNBOX Without auxiliary contacts 7,5 kW 25 A KG20 T104/NL-EXB KNBOX 11 kW 32 A KG32 T104/NL-EXB KNBOX 15 kW 40 A KG41 T104/NL-EXB KNBOX Maximal number of locks Padlock device U-bolt-Ø Number of locks 6 3 4 pole + 1NO/1NC 4 pole 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 MAIN & MAINTENANCE SWITCHES ATEX Maintenance and Safety Switches, Zone 21 4 pole, 4 pole + 1 NO/NC 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 31 32 43 44 L1 T1 L2 T2 L3 T3 N N L1 T1 L2 T2 L3 T3 N N 115 190 102 M32 M20 26 101 128 31 5,3 80 7
Maximal number of locks Padlock device U-bolt-Ø Number of locks 6 3 4 pole + 1NO/1NC 4 pole 31 32 43 44 L1 T1 L2 T2 L3 T3 N N L1 T1 L2 T2 L3 T3 N N Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T204/NL-EXRA KNBOX 11 kW 32 A KG32 T204/NL-EXRA KNBOX 15 kW 40 A KG41 T204/NL-EXRA KNBOX 20 kW 55 A KG64 T204/NL-EXRA KNBOX Without auxiliary contacts 7,5 kW 25 A KG20 T204/NL-EXR KNBOX 11 kW 32 A KG32 T204/NL-EXR KNBOX 15 kW 40 A KG41 T204/NL-EXR KNBOX IP RATING HANDLE OPTION ALSO INCLUDED SAFETY SPEC IP66 protection red and yellow handle 2 x M25 ATEX cable glands , 2 x M32/M25 adaptors and 1 dummy plug M20 included 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 and Safety Switches, Zone 21 4 pole, 4 pole + 1 NO/NC MAIN & MAINTENANCE SWITCHES 115 190 102 M32 M20 26 101 128 31 5,3 80 7 7
Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T106/NL-EXBA KNBOX 11 kW 32 A KG32 T106/NL-EXBA KNBOX Maximal number of locks Padlock device U-bolt-Ø Number of locks 6 3 MAIN & MAINTENANCE SWITCHES ATEX Maintenance and Safety Switches, Zone 21 6 pole + 1 NO/NC 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 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 1L1 1T1 1L2 1T2 1L3 1T3 13 14 21 22 2L1 2T1 2L2 2T2 2L3 2T3 115 190 102 M32 M20 26 101 128 31 5,3 80 7 6pole + 1NO/1NC
Utilization Category AC-23B (A) Thermal Current (Ithe) Order number With auxiliary contacts (1 NO, 1 NC) 7,5 kW 25 A KG20 T206/NL-EXRA KNBOX 11 kW 32 A KG32 T206/NL-EXRA KNBOX Maximal number of locks Padlock device U-bolt-Ø Number of locks 6 3 1L1 1T1 1L2 1T2 1L3 1T3 13 14 21 22 2L1 2T1 2L2 2T2 2L3 2T3 ATEX Maintenance and Safety Switches, Zone 21 6 pole + 1 NO/NC MAIN & MAINTENANCE SWITCHES IP RATING HANDLE OPTION ALSO INCLUDED SAFETY SPEC IP66 protection red and yellow handle 2 x M25 ATEX cable glands , 2 x M32/M25 adaptors and 1 dummy plug M20 included 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 6pole + 1NO/1NC 115 190 102 M32 M20 26 101 128 31 5,3 80 7 9
These Groups are sub-divided into Categories, as shown below. The way in which this categorisation has been developed highlights one of the main distinctions of Group I and II. For Group I, the categorisation depends on (amongst other factors) whether the product is to be deenergised in the event of an explosive atmosphere occurring. For Group II, it depends where the product is intended to be used in and whether a potentially explosive atmosphere, is always present, or is likely to occur for a long or a short period of time. Group I: Underground and above ground installations for mining industry with hazardous choke damp and mine dust Category Accepting Category M1 Very high level of protection Safety in the event of two faults occurring independently of each other Category M2 High level of protection Device must be turned off in case of potentially explosive atmosphere Group II: Other ex-areas Category Accepting of danger Accepting Zone Substance class Category 1 Highly likely to occur and are present continuously, for long periods of time or frequently Very high level of protection Safety in the event of two faults occurring independently of each other Zone 0 G (Gases) Zone 20 D (Dusts) Category 2 Likely High level of protection Safety in the event of one fault Zone 1 G (Gases) Zone 21 D (Dusts) Category 3 Unlikely Normal level of protection Suitable for normal operation Zone 2 G (Gases) Zone 22 D (Dusts) Group I comprises equipment intended for use in the underground parts of mines, and to those parts of surface installations of such mines, likely to become endangered by firedamp and/or combustible dust. Group II comprises equipment intended for use in other places likely to become endangered by explosive atmospheres. INTERESTING FACTS & APPROVALS ATEX groups & catagory of equipment
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sales-nz@krausnaimer.com Free Phone 0800 736522 42 Miramar Avenue 6022 Wellington krausnaimer.com ATEX Maintenance & Safety Switches, Zone 21
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