WBBSE Madhyamik Power (Vocational) case studies
WBBSE Madhyamik Power (Vocational) · Put your knowledge to work in context.
The WBBSE Madhyamik Power (Vocational) subject is a vocational elective offered under the West Bengal Board of Secondary Education's Madhyamik (Class 10) framework. It suits students who want a practical, trade-oriented subject alongside general academics - particularly those considering ITI, polytechnic diploma, or apprenticeship routes into electrical work, line maintenance, or the power sector. The WBBSE Madhyamik Power (Vocational) case studies are 5 cases and about 4,647 words.
1Live Chassis on a Wet Floor: Why the Fuse Never Blew
At a small flour mill near Kharagpur, a helper touches the metal body of a 1.5 kW, 230 V single-phase atta chakki and is thrown back by a shock. The mill is fed from a 15 A socket through a three-core flexible cable whose earth pin has been cut off at the plug.
942 words, about 5 min2Sizing a Tailoring Room Supply Against What the Owner Already Bought
A single-phase 230 V supply must be wired for a small tailoring training room. The load schedule is: 12 LED fittings of 18 W, 6 ceiling fans of 75 W, 6 socket outlets counted at 100 W each, one 1.6 kW split AC drawing about 8.7 A at 0.8 power factor, and one 2 kW water heater.
958 words, about 5 min3A Submersible Pump That Trips Its Overload Every Twenty Minutes
A 3.7 kW, 415 V three-phase submersible pump irrigates a plot from a borewell. The nameplate gives 7.6 A, power factor 0.83 and efficiency 0.82.
901 words, about 5 min4Why a 0.5 HP Grinder Shuts Down an 800 W Inverter
A tailoring shop runs a 12 V, 800 W modified-sine-wave inverter with a 12 V, 150 Ah tubular lead-acid battery. The backup load is normally 6 LED lamps of 15 W, 4 fans of 75 W and a 120 W television.
943 words, about 5 min5A 3 kWp Rooftop Plant Producing 30 Percent Less Than Promised
In Kolkata, at about 22.6 degrees north, a housing society installs a 3 kWp grid-tied rooftop plant: 8 modules of 375 Wp and a 3 kW string inverter. The modules are tilted at 12 degrees and face 25 degrees west of true south.
903 words, about 5 min