Turbine and Generator Repair
ATS offers a complete range of test and inspection solutions for generators including life assessment and provide failure investigation and recommendation too. The test and inspection performed are linked to GAP - a solution for lifetime assessment of generators. GAP in turn is linked to the planned outage of the plant to maximize generator availability.
Our refurbishment service includes minor & major overhaul, generator dismantling & reassembly, test & inspection, corona suppression treatment, stator rewedging, generator auxiliaries, etc. Most of the refurbishment activities are performed on-site.
Repair and Spare Parts
Our solutions for minor and major repairs for generators include, part winding repairs, supply of bars, stator rewind, rotor rewind, retaining ring replacement, high speed balancing, etc. Stator rewind and retaining ring insulation replacement can be performed on-site.
Moreover, ATS can also supply all the spare parts for generator like bearing, hydrogen seal, gas cooler, slipring, carbon brush, diode, fuse, etc.
Maximize availability & Reliability
alfanar generator maintenance solutions ranges from basic recondition to complete rebuilds both in-house as well as on-site.
brief description of maintenance solutions offered is given below:
Stator service includes
Rotor service includes
Generator testing includes
Exciter service include
Spare parts supply includes
alfanar also offers a comprehensive maintenance services for mechanical equipment's like turbines, compressors, pumps, diesel engines like capital overhauling, refurbishment, balancing, dry ice cleaning and more.
The life of a generator is mainly dependent on the life of its insulation. Therefore, the aging process of the generator must be very closely monitored. Just like the pulse rate, the blood pressure, sugar level etc., of a human are indicative of his health condition, the capacitance, leakage current, dissipation factor, polarization index, surge voltage with standing strength and partial discharge factors are indicative of the insulation condition of an electric rotating machine.
Estimation of the remaining life of a generator is based on the following information:
On an average, the lifetime of the stator and rotor winding of a base loaded generator is about 35 and 25 years respectively. The lifetime will get reduced due to peak load or abnormal operating conditions. Other factors, such as, insulation abrasion, loose end-windings support and contamination may reduce the lifetime expectancy even more.
alfanar Technical Services now offers GAP - a solution to lifetime assessment of generators - addresses the problems faced during the lifetime of a generator with an aim of increasing reliability and availability. Moreover, GAP is designed to perform generator assessment linked to the planned outage of the plant and thereby minimizing downtime.
The past study and experience has shown that the availability of generator is determined largely by stator winding system, and thereby GAP methodology focus more on the stator winding compared to the rotor and other parts of the generator.
4 levels of Generator Assessment Process
GAP1 and GAP2 assessments with rotor-out. Perform ELCID, wedge tightness, bump, corona and other special tests. Perform condition and life assessment.
Unscheduled plant stoppages, whether caused by technical or human factors, result in loss of profitability. Generators and components that have reached end-of life status cannot continue safe and reliable operation - preventive maintenance actions and well-thought out asset management are keys to productive uptime and safety for people and the environment.
alfanar offers a wide variety of test and inspection services that help to manage and optimize the life cycle of your generators.
Together with our customers we can plan the best way to carry out test and inspection to get the following benefits:
alfanar has extensive experience in performing condition and life assessment on motors, generators and transformers in Middle East region and work together with the customer to ensure availability and reliability of the electrical machines.
alfanar provides Dry ice blasting, which is a relatively new cleaning process using solid CO pellets. The pellets sublimate (convert 2 directly from a solid blast pellet to a vapor) leaving no residue. The process has grown considerably in popularity as a replacement for common sand blasting, largely due to its environmental and production benefits.
Squirrel Cage Rotor