IEEE 637-1985
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use
20-11-2015
English
30-11-1984
1 Introduction
2 Scope
3 Definitions
4 References
5 Classification of service-aged oils and criteria
for reuse
5.1 General classification of service-aged oils
5.2 Suggested limits for classes of service-aged oils
5.3 Economic factors
5.4 Sources of oil to be reclaimed
5.5 Precautions
5.5.1 Askarel
5.5.2 Silicone fluids
5.5.3 Other fluids
5.5.4 Suspended carbon
5.6 Criteria for resuse of reclaimed oil
5.6.1 Makeup or replacement oil for transformers and
reactors which are out of warranty
5.6.2 Makeup or replacement oil for oil circuit
breakers
6 Types of reconditioning and reclamation processes
6.1 Gases and water-vacuum dehydration
6.2 Water and solids
6.2.1 Blotter or filter press
6.2.2 Centrifuge
6.2.3 Coalescing filter
6.2.4 Precipitation or settling
6.3 Adsorption of soluble contaminants
6.3.1 Materials
6.3.2 Contact process
6.3.3 Percolation by gravity
6.3.4 Percolation by pressure
6.4 Types of pressure percolation
6.4.1 Bulk filters
6.4.2 Deep bed filtration
6.4.3 Throw-away and repackable cartridges
6.4.4 Percolation by thermo-siphon bypass
6.5 Activated carbon sodium silicate process
6.6 Reclamation by trisodium phosphate
6.7 Modern oil reclamation systems
6.7.1 Normal systems
6.7.2 On-site energized systems
6.8 Locations
6.8.1 Centralized reclamation site for pooled oil
6.8.2 Mobile reclamation of pooled oil
6.8.3 Reclamation of oil in transformers and associated
devices using mobile equipment
6.9 Choice of methods
7 Oil tests and their significance
Figures
1 Adsorption by attapulgite-clay
2 Schematic diagram of gravity-percolation refining
apparatus
3 Bulk clay filters
4 Three-clay tower system
5 Fuller's earth cartridge filters
6 Schematic diagram of trisodium phosphate/Fuller's
earth refining apparatus
7 Typical flow diagram for modern, oil-reclamation
system
Tables
1 Suggested limits for in-service oils group 1 by
voltage class
2 Suggested limits for oil to be reconditioned or
reclaimed
3 Suggested property requirements of reclaimed oil
for transformers
4 Suggested test limits for reclaimed oil in
transformers and reactors after filling, but
before energizing
5 Suggested test limits for reclaimed oil in
circuit breakers, reclosers, and load tap oil-
purification practices
6 Oil-purification practices
7 ASTM test procedures
Appendix
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.