Sweep Frequency Response Analysis (SFRA) tests has become a valuable tool for verifying the geometric integrity or the mechanical failure of electrical apparatus, such as, power transformers due to impact, short circuit faults, or movement of transformer windings.
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Course Background : Sweep Frequency Response Analysis (SFRA) tests has become a valuable tool for verifying the geometric integrity or the mechanical failure of electrical apparatus, such as, power transformers due to impact, short circuit faults, or movement of transformer windings. SFRA tests technique provides internal diagnostic information using non-intrusive procedures, off line test and over the last fifteen years, only SFRA tests method has proven accurate and repeatable measurements, on the mechanical movements of power transformer components inside the apparatus. Power transformers are the most valuable asset in the substation. A critical decision has to be made when the transformer is to withstand the mechanical forces arising from accident due to shipment or transport of the apparatus and subsequent in-service events, such as faults and lightning strikes is extremely important to prevent catastrophic breakdowns in the near future. Transportation damage can occur, if the clamping and restraints are inadequate; such as, damage may lead to core and winding movements. The most severe in-service forces arise from system faults, that may result in axial and radial deformations, to name a few. If these forces are excessive, radial buckling or axial deformation may occur. With a core form design the principal forces are radially directed, whereas in a shell form unit they are axially directed, and this difference is likely to influence the types of damage found. This 16-Hour course will equip you the Basic Knowledge of SFRA theory, test methods, techniques and analysis of test results. The course is for beginner, or an experienced maintenance technical staff who wants to be effective as a test engineer and for an advanced test engineer to learn new concepts in power transformer testing using the latest test procedure, SFRA. Who Should Attend :
- Engineers & Technicians in the utilities handling substation maintenance.
- Engineers and electricians in commercial and industrial maintenance.
- Electrical consultants and electrical project managers, who oversee tests procedures.
- Electrical Engineering graduates who would like to be Test Engineers and Technicians for substations.
- Facilities engineers and shift engineers
- SFRA Introduction and History
- Overview on SFRA Development
- Transformer Symptoms and motivation for Transformer Testing
- SFRA When & Why ?
- SFRA Theory & Practice
- SFRA Diagnostic Technique
- SFRA Open & Short Circuit Test Variations.
- SFRA Test Procedures & Connections
- SFRA Typical Results
- SFRA Basic Analysis of Test Results
- SFRA Hands-on Testing
Training Objectives : At the end of the program the participants will be able to:
- Discuss the SFRA basic theory.
- Explain Transformer RLC Circuit under test.
- Conduct SFRA tests, following Standard methodologie.
- Explain the typical SFRA traces for different types of transformer configuration.
- Know how to interpret SFRA test results.
- Discuss SFRA application & benefits.
- Demonstrate actual SFRA testing.
Day 1 (8 hours)
- SFRA history and introduction
- SFRA Terminologies
- Transformer Symptoms & Decisions
- Motivation for Testing
- SFRA When & Why
- SFRA Diagnostic Techniques
- SFRA Theory & Practice
- SFRA Testing Methodologies & Procedures
- SFRA Typical Results for Transformers
- Variation of SFRA Traces with different transformer configurations.
- Effect of Bad Grounds and Magnetization with SFRA results
- SFRA Basic Analysis
Day 2 (8 hours)
- SFRA Hardware & Software
- SFRA Hands-on Testing.
- Test Results and Interpretation and analysis.
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Engr. Eduardo M. Pabuna, Jr. REE
Engr. Pabuna has 15 years of experience in electrical design simulations, power system studies and substation testing, that makes Engr. Pabuna an experienced electrical professional and facilitator for this program. He is also a resource speaker for various international and local conferences/seminars such as IIEE, Meralco and ABB to name a few. His engineering practice also involves supply, installation, testing and commissioning for major clients like National Power Corporation, Cebu-Mactan Interconnection project, Lafarge Cement, Clark Substation NGCP Project, San Miguel Corporation and various electric cooperatives. Engr. Pabuna is currently the Engineering Head of WESTCO Electrical and Equipment Corp.
Engr. Alex Castro, REE
Engr. Castro’s exposure to testing of substation apparatus such as power transformers, potential transformers, current transformers, circuit breakers, disconnect switches and surge arresters equip him with the technical knowledge and experience to share in his seminars. His experience also comes from Meralco Industrial Engineering Services Corp. as a Project Supervisor. He is currently the Section Head of the Engineering department for WESTCO Electrical and Equipment Corp.
Sweep Frequency Response Analysis (SFRA) Competency Training
per person (inclusive of snacks, lunch, computer hands-on and certification)