104 Technical Information Kraus & Naimer Switches - General Information General Electrical Data Minimum voltage – varies on switch, data on request. Power loss per contact at Iu – varies on switch, data on request. Resistance to vibration – varies on switch, data on request Resistance to shock – varies on switch, data on request Rated impulse withstand voltage – varies on switch, data on request Short circuit protection – varies on switch, data on request. Terminal lead material – use copper wires only. Altitude – IEC 60947-1, 6.1.2 specifies Altitude does not exceed 2000m. Note for equipment to be used above 2000m it is necessary to take into account the reduction of dielectric strength & cooling effect of the air. Contact us for derating factors. Forced Opening Contacts – KG type switches & switch disconnectors can be fitted with cam operated and or rack operated aux contacts with a direct opening action. As these aux contacts fully comply with the requirements outlined in Annex K of the product standards IEC 60947-5-1:1997 & EN60947-5-1:1999 they are suitable for isolation. Aux contacts can have rigid or H bridge “cross wire” contacts for low voltages & currents. High Frequency – K&N switch ratings are valid for frequencies between 45Hz & 150Hz. For higher or lower ratings DC ratings can be used or contact us for best practice advice. Low Voltage Switching – Most control switches use a rigid double break contact system. K&N also offer multi cross point contacts, H bridge “crosswire” contacts, with or without gold plating and “knife contact” systems. See page 35 for general information or contact us for more specific ratings. Short Time Current Ratings – Short time ratings for 1, 3, 6,10,30,60,100 & 200 seconds are available on request. Ratings available for both CA type and KG switches. Operating Temperatures – Normal use @ 100% of rating (standard applications) max ambient temperatures • Average over 1 year +40° C • Average over 24 hours +55° C with peaks up to +60° C Operating Temperatures – Normal use @ 30% of rating (standard applications) max ambient temperatures • Average over 1 year +70° C • Average over 24 hours +85° C with peaks up to +90° C Special Switch Configuration - K&N cam switches can be made to any contact configuration. This means we can replicate any old switch that has failed with a wire for wire replacement overnight. See pages 46 & 47 for design sheets. Terminal Position – Most control switches are normally supplied the terminals on the horizontal plane. In situations where switches are mounted closely together difficulties accessing the terminals may arise. In this case back access terminal switches are available. Contact us for your requirements. Contacts - Do not lubricate or treat contacts. Note: Minimum Operating Temperature - The minimum operating temperature for all K&N switches is -5°C. Lower temperature value on request, derating may apply.
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