Estimation
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This document discusses the process of estimation in construction projects. It defines estimation and lists the necessary abilities of an estimator such as vision, innovative thinking, and technical knowledge. It describes the different types of estimation including thumb rule based, approximate, and scientific estimation. Scientific estimation is affected by factors like plans, material selection, specifications, price catalogues, site conditions, and availability of skilled workers. Estimation requires tools like blueprint reading, knowledge of standard rate of items, materials selection, and an understanding of how time and working conditions impact labor costs. The total cost of a project includes material costs, labor costs, and overhead charges.
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The document discusses five different mounting techniques for silicon controlled rectifiers (SCRs) used in power electronics based on capacity level: lead mounting for low capacity, stud mounting for medium-high capacity, bolt mounting for medium-high capacity, press fit mounting for higher capacity, and press pack/disc/hockey pack mounting for very high capacity applications where multiple SCRs are sandwiched between heat sink plates for cooling.
SCR PROTECTION PART 2
SCRs require protection from over voltage, over current, and high rates of change of voltage and current. This is because SCRs are sensitive devices that can be damaged by transient overloads or abnormal operating conditions. Various protection techniques are used like snubber circuits, surge suppressors, fuses, contactors, and gate protection circuits to prevent damage to SCRs in power electronic applications and ensure reliable system operation.
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Software Engineering and Project Management - Introduction, Modeling Concepts...
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our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
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Estimation
- 1. By: Prof. Ranjit Kumar Parmar ELECTRICAL ENGINEERING DEPARTMENT GOVT POLYTECHNIC JUNAGADH Electrical Dept Govt Polyytechnic Junagadh
- 2. Estimation Definition Think and tell Purpose of Estimation What should be the minimum abilities of estimator? Vision Innovative thinking Technical knowledge Site info Electrical Dept Govt Polyytechnic Junagadh
- 3. Estimation Think and tell Importance of estimation in real life.. Electrical Dept Govt Polyytechnic Junagadh
- 4. Types of Estimation 1. Thumb rule based 2. Approximate estimation 3. Scientific estimation Comparison of above methods Electrical Dept Govt Polyytechnic Junagadh
- 5. Factors affecting Scientific estimation Plan, Drawings etc Calculation of material required Specifications Price catalogue Site condition Availability of skilled workers Electrical Dept Govt Polyytechnic Junagadh
- 6. Contd.. Market aspects of material Selection of material Transportation facilities Electrical Dept Govt Polyytechnic Junagadh
- 7. Estimation tools Blue print reading Maths? Material selection Info about SOR Laws? Does time matter? Electrical Dept Govt Polyytechnic Junagadh
- 8. Total Cost 1. Material Cost Price Catalogue SOR Electrical Dept Govt Polyytechnic Junagadh
- 9. Total Cost 2. Labor cost Hyper skilled Skilled Semi skilled unskilled Electrical Dept Govt Polyytechnic Junagadh
- 10. Total COst 3. Over head charges Office or admin charges Salary of staff, bonus , amenities etc Transportation Telephone, electricity Internet bills etc. Legal issues Maintenance Taxation Interest on depreciation Profit…too to be counted….!! Electrical Dept Govt Polyytechnic Junagadh
- 11. Effect of Working condition on labor cost City or Village Open space or constructed Distance b/w work place & Residence GF or higher floors Working time Season Physical & Mental condition Electrical Dept Govt Polyytechnic Junagadh
- 12. Thank you.. Electrical Dept Govt Polyytechnic Junagadh