Revolutionary equipment of Electrical technology Following equipment of electrical technology are the create changes in our working & living style. 1. Battery :It allow us to address the power of electricity in early period of development of electrical engineering field. We were use battery in some small application like lighting radio etc. but now there are major use of battery in our day to day application in toys, mobile, laptops, remote, moving equipment , Automobile etc. Actually it is a primary electric source for generating electrical energy.After many years we have no other equipment for storage of electrical energy other than battery so it makes major demand of battery in the market. 2. Lighting Lamp : Many peoples remember the time of candles, diyas/chirags for lightning their homes at the time of night or dark place. But now these are almost over in the past.But there are many types of Lighting lamps available in the markets such as fillament bulb, HPSV Lamps,...
Posts
Source for Emergency 415 VOLTS Source for Normal (phase to phase) 415 VOLTS Power factor for Welding receptacle 0.85 Power factor for Elevator 0.85 Power factor for 70W / 150W HPSV 0.85 Power factor for Aviation Light 0.85 All factors use in Cable schedule As per enclosed Catalogue of Polycab S.NO. CABLE FROM TO VOLTAGE CONNECTED LOAD (KW) LOAD CURRENT=(Dx1000)/(√3xCxCos ф ) CABLE SIZE CABLE TYPE CABLE CURRENT RATING(AMP.) CABLE CURRENT AFTER DERATING AT 50° =(H x RATING FACTOR AT 50 °CX GROUP RATING FACTOR) MAX. D.C. CONDUCTOR RESISTANCE AT 20 ...
The place where power is generated, step upped & transmitted to remote places, called a Power plant. Power planets are Six types. 1. Thermal power plant 2. Hydro power plant 3. Nuclear power plant 4. Gas power plant 5. Solar power plants 6. Wind power plants 1. Thermal power plant: Where electricity is generated using of steam from coal heat energy. chemical energy of coal is converted to heat energy in a furnace. this heat energy is using to boil water and used for generate steam in a boiler. this steam is further heated to generate for super-heated steam which contains high energy level. this super-heated steam travelled from boiler to a turbine and this steam pusses the wings of turbine so that it is generated mechanical forces. Due to these forces rotation forces generated on turbine shaft and shaft is start to rotate as per our requirement.We can control the speed of shaft with using governors. this shaft is coupled with generator shaft and power has been transf...
CABLE SIZING CALCULATION: Why do the calculation? The proper sizing of an electrical (load bearing) cable is important to ensure that the cable can: · Operate continuously under full load without being damaged · Withstand the worst short circuits currents flowing through the cable · Provide the load with a suitable voltage (and avoid excessive voltage drops) · (optional) Ensure operation of protective devices during an earth fault When to do the calculation? This calculation can be done individually for each power cable that needs to be sized, or alternatively, it can be used to produce cable sizing waterfall charts for groups of cables with similar characteristics (e.g. cables installed on ladder feeding induction motors). General Methodology All cable sizing methods mo...