ABB MT series Installation, Operation & Maintenance Manual

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ABB MT series Installation, Operation & Maintenance Manual Manual pdf 17 page image

6.2.4 LubricantsWARNINGDo not mix different types of grease.Incompatible lubricants may cause bearing damage.When regreasing, use only special ball bearing grease withthe following properties:– good quality grease with lithium complex soap and withmineral- or PAO-oil– base oil viscosity 100-160 cST at 40°C– consistency NLGI grade 1.5 - 3 *)– temperature range -30°C - +120°C, continuously.*) For vertical mounted motors or in hot conditions a stifferend of scale is recommended.The above mentioned grease specification is valid if theambient temperature is above -30°C or below +55°C, andthe bearing temperature is below 110°C; otherwise consultABB regarding suitable grease.Grease with the correct properties is available from all themajor lubricant manufacturers.Admixtures are recommended, but a written guaranteemust be obtained from the lubricant manufacturer,especially concerning EP admixtures, that admixtures donot damage bearings or the properties of lubricants at theoperating temperature range.WARNINGLubricants containing EP admixtures are notrecommended in high bearing temperatures in framesizes 280 to 450.The following high performance greases can be used:- Esso Unirex N2 or N3 (lithium complex base)- Mobil Mobilith SHC 100 (lithium complex base)- Shell Gadus S5 V 100 2 (lithium complex base)- Klüber Klüberplex BEM 41-132 (special lithiumbase)- FAG Arcanol TEMP110 (lithium complex base)- Lubcon Turmogrease L 802 EP PLUS(special lithium base)- Total Multiplex S 2 A (lithium complex base)NOTE!Always use high speed grease for high speed 2-polemachines where the speed factor is higher than480,000 (calculated as Dm x n where Dm = averagebearing diameter, mm; n = rotational speed, r/min).The high speed grease is also used in motor typesM2CA, M2FA, M2CG and M2FG, frame sizes 355 to400 2-pole machines.The following greases can be used for high speed cast ironmotors but not mixed with lithium complex greases:- Klüber Klüber Quiet BQH 72-102 (polyurea base)- Lubcon Turmogrease PU703 (polyurea base)If other lubricants are used;Check with the manufacturer that the qualities correspondto those of the above mentioned lubricants. The lubricationinterval are based on the listed high performance greasesabove. Using other greases can reduce the interval.If the compatibility of the lubricant is uncertain, contactABB.Low voltage motor manual 01-2009 | ABB Motors and Generators EN-17