IEEE 492:1999 pdf download.IEEE Guide for Operation and Maintenance of Hydro-Generators.
1.1.1 Application
This guide covers general recommendations for the operation. loading, and maintenance of synchronous hydro-generators and generator/motors. It does not apply to synchronous machines having cylindrical rotors. In this guide, the term hydro-generator is used to describe a synchronous machine coupled to a hydraulic turbine or pump-turbine. This guide is not intended to apply in any way to the prime mover.
1.1.2 Manufacturer’s instructions
This guide is not intended to supplant specific or general instructions contained in the manufacturer’s instruction hook or in any contractual agreement between the manufacturer and the purchaser of a given machine.
1.1.3 Limitations due to various designs
Equipment manufacturers have taken different approaches to the solution of design requirements: therefore, it is not practical to relate specifically in this guide to all the variations of machine design. However, many of the operational and maintenance procedures and problems are common to all the designs and, therefore, recommendations are given concerning solutions to these procedures and problems. The most that this document can accomplish is to provide guidelines, which, on one hand, disclose accepted and tried values or methods, and on the other hand, give warnings where hazards might be encountered.
1.1.4 Exciters
This guide does not cover in detail associated rotating or stationary excitation systems.
1.2 Caution
1.2.1 Load conditions beyond design rating
It should be recognized that conditions more severe than those specified by the nameplate, instruction hook, or any contractual agreement between the manufacturer and the purchaser should not be applied to the machine. If there is a need to exceed the specified conditions, it should be done only after a thorough study of the various considerations pertinent to the specific condition and also the capabilities of the machine and associated equipment. It is recommended that the situation he discussed with the manufacturer ot the mach Inc.
1.2.2 Reference publications
Many IEEE and ANSI standards are referenced in this guide. The standards referenced in this revision are those in effect when this guide was approved. Users are cautioned to carefully review the history of older machines with respect to IEEE and ANSI standards in effect at the time the particular generator was manufactured. Older machines may not operate satisfactorily to the requirements of modern standards with regard to temperature rise, overload capability, abnormal operating conditions, etc.
2. References
The following standards were used as references in preparing this guide and apply to the machines described in it. When any of the IEEE standards referred to in this guide are superseded by an approved version. the revision shall apply.
ANSI C50. 10-I 990, Rotating Electrical Machinery — Synchronous Machines.
ANSI C50. 1 2-1982 (Reaff 1989), Requirements for Salient Pole Synchronous Generators and Generator/ Motors for Hydraulic Turbine Applications.
IEEE Std 1-1986 (Reaff 1992), IEEE Standard General Principles for Temperature Limits in the Rating of Electric Equipment and for the Evaluation of Electrical Insulation.
IEEE Std 43-1974 (Reaff 1991), IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery.
IEEE Std 56-1977 (Reaff 1991), IEEE Guide for Insulation Maintenance for Large Alternating-Current Rotating Machinery (10 000 kVA and Larger).
IEEE Std 95-1977 (Reaff 1991), IEEE Recommended Practice for Insulation Testing of Large AC Rotating Machinery with High Direct Voltage.IEEE 492 pdf download.