Showing posts with label Protection. Show all posts
Showing posts with label Protection. Show all posts

Thursday, July 29, 2010

MCB Protected Socket


Havells released a new MCB that will be a good replacement for conventional Switch Fuse Units (SFU) and domestic sockets. Havells MCB Protected Socket is a special purpose Distribution box with inbuilt over current protection. Havells MCB Protected Socket provide high quality contacts ensures reliability, suitable for individual protection of home appliances like ACs, Geyser, Microwave etc. The special features of MCB Protected Socket include an aesthetic appeal.

Read more at: Havells (http://www.facebook.com/album.php?aid=209403&id=158543814611).

Friday, July 16, 2010

Latest Design and Engineering software for Engineers

The technology is changing at lightning speed. Now engineers around the world are using latest softwares for design and simulation purpose. Electrical, Civil, Mechanical, Electronic, Production, Protection and Transmission Line Design Engineers can use the latest software. Now see the list of latest software and their use.

ETAP: Calculation related to system fault, short circuit, power flow, current supply, derating factor, earthing system and voltage drop.

CYMCAP: Power cable ampacity calculation per IEC – 60287.

ASPEN: Overhead transmission line and underground cable impedance calculation.

CDEGS: Substation grounding design & Analysis per IEEE-80.

PLS-CADD:A comprehensive program for structural and geometric design of overhead lines including terrain modeling, route selection, manual or automatic minimum cost evaluation, sag tension, clearance, string charts, strength charts, material list generation ‘plan and profile’ drafting.

ALCOA SAG 10:Calculation related to Conductor Sag & Tension, Mechanical load and stresses etc.

STAAD/Pro:A widely accepted general purpose structural analysis and design program for geometric modeling of 2D & 3D frame trusses, plates and various other surfaces which can be generated graphically and with features to generate various kinds of loadings and to perform RCC design, structural steel design, supporting provisions of various international codes.

PLS-TOWER:Complete, integrated computer program for the analysis of Steel Latticed Towers, Communication Towers and Substation Steel Structures.

PLS-POLE:Design of steel monopoles.

PLS-FOOTING:Design of spread footing foundations for Transmission Line towers and substation steel structures foundations.

CAISSON:Design of moment resisting concrete pier foundations for Transmission Line monopoles, small base Substation towers and equipment support structure foundations

ATP (Alternate Transient Program): Insulation coordination study.

SHAFT V.5: Design of axially loaded drilled shafts.

Electrical System Protection

Electrical System Protection is a very important field of study. Most of the design engineers find it difficult to Electrical Protection System protect their equipments from voltage surges, power breakers, fluctuations etc. There are several standard projections used for electrical power systems. The basic protection systems are Overload Protection, Under voltage Protection, Overvoltage Protection, Phase Failure Protection, Phase Sequence Reversal Protection. The first one that is Overload or over current protection is sufficient for majority or equipments. A simple schematic is given in the figure. This is a basic circuit that trigger an opening solenoid and protect the system from overloads. Now you take any circuit around you and make a schematic of the same. Your schematic will look very same as this figure!

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