Ship Technology Rules for Classification and Construction (Electrical Installations) DOWNLOAD : http://www.gl-group.com/infoServices/rules/pdfs/gl_i-1-3_e.pdf ...
Thursday, March 13, 2014
Eaton Power Distribution Systems (ebook)
DOWNLOAD : http://www.eaton.com/ecm/idcplg?IdcService=GET_FILE&allowInterrupt=1&RevisionSelectionMethod=LatestReleased&Rendition=Primary&dDocName=TB08104003E ...
Wednesday, March 12, 2014
ELECTRICAL ESTIMATION
DOWNLOAD : http://polytechnic.nprcolleges.org/econtent/eee/EE.pdf ...
Electrical Thumb Rules
Current rating of Transformer / Generator (I) KVA X 1.4 Impedence of Transformer (Z) 5 % Short circuit rating of Transformer Current Rating / % Impedence = I / Z No Load Current of Transformer < 2 % of rated current of Transformer Impedence of Generator...
Electrical Engineering Thumb Rules
Earthing Resistance: Earthing Resistance for Single Pit=5Ω ,Earthing Grid=0.5Ω As per NEC 1985 Earthing Resistance should be <5Ω. Voltage between Neutral and Earth <=2 Volts Resistance between Neutral and Earth <=1Ω Creepage Distance=18 to 22mm/KV (Moderate Polluted Air) or Creepage Distance=25 to 33mm/KV (Highly Polluted Air) Minimum Bending...
Tuesday, March 11, 2014
Choice of a circuit-breaker
Choice of a circuit-breaker The choice of a CB is made in terms of: · Electrical characteristics of the installation for which the CB is intended · Its eventual environment: ambient temperature, in a kiosk or switchboard enclosure, climatic conditions, etc. · ...
Low Voltage Circuit Breakers
Based on IEC 60947-2 (LV switchgear and controlgear - Part 2: Circuit breakers): In (Rated current) The rated continuous / uninterrupted current that the circuit breaker can carry. Icm (Rated short-circuit making current) The short-circuit current that the circuit breaker can withstand as it is closing where the act of closing initiates the...
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