Page 264 - Industrial Power Engineering and Applications Handbook

Installation and maintenance of electric motors 10/243
IS0 system of limits and fits. Bases of tolerances, 919 (Part-YII) BS EN 20286- 286-111988
deviations and fits 1993 1/1993
Code of practice for installation and maintenance of rolling 3090/1996 - -
bearings
Specification for lithium based grease for industrial purposes 1623/1993 - -
Code of practice for installation and maintenance of 900/1992 - -
induction motors
Dimensions of slide rails 2968/1991 (DIN 42923)
Relevant US Standards ANSUNEMA and IEEE

ANSIIIEEE Guide for insulation maintenance of large a.c. rotating machines (10 kVA and larger)
56/1992
NEMA/MG Motors and generators ratings, construction, testing and performance
2/1993
NEMA/MG Safety Standards (enclosures) for construction and guide for selection, installation and use of rotating machines
2/1989
NEMA/MG Energy management guide for selection and use of three phase motors
10/1994
NEMA/MG Energy management guide for selection and use of single phase motors
1111992
ANSIIIEEE: Guide for insulation maintenance for rotating machines (5 h.p. to < 10,000 h.p).
432/1998

Notes
1 In the tables of relevant Standards in this book while the latest editions of the standards are provided, it is possible that revised editions
have become available. With the advances of technology andlor its application, the updating of standards is a continuous process by
different standards organizations. It is therefore advisable that for more authentic references, readers should consult the relevant
organizations for the latest version of a standard.
2 Some of the BS or IS standards mentioned against IEC may not be identical.
3 The year noted against each standard may also refer to the year of its last amendment and not necessarily the year of publication.

List of formulae used D = bearing outside diameter (mm)
B = bearing width (mm)
Relubricating interval

10.1) Further reading

1 Lundberg, G. and Palmgren, A,, ‘Dynamic capacity of roller
RG = relubricating interval in hours of operation bearings, Acta Polytechnica, Mechanical Engineering Series
K = a factor depending on type of bearing I, Proceedings of the Royal Swedish Academy of Engineering
d = bearing bore diameter (mm) Sciences, No. 3, 7 (1947).
2 Lundberg, G. and Palmgren, A,, ‘Dynamic capacity of roller
bearing,’ Acta Polytechnica M.E., Series 2, RSAES, No. 4, 9
Quantity of regrease (1952).
3 Lundberg, G. and Palmgren, A., Load Ratings and Fatigue
G, = 0.0050 x B grammes (g) (10.2) Life for Roller Bearings, Std. 11-1978.
4 Seameatson, R.W. (ed.), Motor Application and
G, = quantity of regrease (g) Maintenance Hand Book.