Web Briefs, April EA

Our new, Blog-version of Web Briefs includes links to the websites/internet references we believe will be useful to persons in the electromechanical industries.  Previously listed in the magazine, these web briefs allow you to be one click away from your desired destination:

Digital Book Indexwww.digitalbookindex.org: historical electric motor books, to read on-line or download as PDF’s, years 1860’s to 1917, in editions from 1882 to 1921. Subjects include elements of a-c theory; induction motor theory; motor applications; synchronous motors; motor troubles; single-phase commutator motors; electric railway motors; motor testing and repair.

Open Electricalhttp://www.openelectrical.org: calculation guides for electrical system equations; UPS, cable, and battery sizing; grounding calculations per IEEE 80; motor starting calculations; short-circuit calculations; solar and wind power systems; overhead line conductors; transformer ratings and testing; cable construction, sizing, and testing; static and rotary phase converters.

Battery Universityhttp://batteryuniversity.com: battery basics—history and technology; how to calculate battery capacity; how to avoid battery failure; battery power cost; electric vehicle batteries; glossary from “Absorbed Glass Mat Battery” to “Zinc-Air”; detailed “advantage/disadvantage” comparison of six types of rechargeable battery (gravimetric energy density, internal resistance, cycle life, maintenance, overcharging tolerance, etc.)

The Physics Classroomwww.physicsclassroom.com: “Physics tutorials” on vectors; work-energy-power; electric field and charge; static and current electricity; common circuits; light and sound.

Solar America Board for Codes and Standardswww.solarabcs.org: reports on photovoltaic system technology, standards, policies, and regulations, including such topics as the permitting process and market design; system grounding and ground fault protection; impact of 2012 international code changes on PV installations; wind load calculations for PV arrays; interconnection procedures; energy metering; positions on current issues such as local codes, fire hazards, and interconnection.

Electrical Power System Engineeringwww.electrical4u.com: “Almost all topics related to electrical power system engineering & technology” including “study sites” with articles on transformer principles (voltage regulation, cooling, gas analysis, losses and testing, protection, equivalent circuit, etc.); power transmission and distribution systems; switchgear and circuit breakers; substations; insulation coordination.

Proviso Systemswww.proviso-systems.co.uk: articles on reliability-centered maintenance, “integrated maintenance solutions,” and maintenance assessment; 26-page booklet “Beginner’s Guide to Machine Vibration”; Power Point presentations on “Vibration Analysis Basic Concepts” and “An Introduction to Vibration Analysis Theory and Practice.”

Pruftechnik Group  — www.pruftechnik.com/fileadmin/user_upload/COM/Machinery_Service/PDFs/EngineersGuide2012.pdf: 192-page engineer’s guide titled “Making Maintenance Matter,” on vibration analysis, shaft alignment, and dynamic balancing techniques; articles on condition monitoring of wind turbines.

DSIRE (North Carolina State University)www.dsireusa.org: database of state incentives for renewable energies and energy efficiency; glossary of tax incentives, loan and rebate programs, and grant programs; building and energy codes; solar and wind access and permitting standards; FAQ’s about DSIRE; links to various types of concerned organizations from state to international.

CR4-Forum Internationalhttp://cr4.globalspec.com: electrical and mechanical engineering forums dealing with general power apparatus questions worldwide—switches, circuits, grounding, transformer ratings and tests, cable and busbar applications, motor starting and generator sizing questions, surge suppressors, current transformers; related forums on manufacturing issues; “The Engineer’s Place for News and Discussion.”

Edited by the EA staff


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