Odisha CHSE +2 VOC-ITV Wireman Control Panel case studies
Odisha CHSE +2 VOC-ITV Wireman Control Panel · Put your knowledge to work in context.
The Odisha CHSE +2 Vocational ITV Wireman Control Panel qualification sits inside the Council of Higher Secondary Education, Odisha vocational stream, where ITV denotes the trade area covering wireman and control panel work. It is designed for students and technicians who need to read panel drawings, select conductors and protective devices, wire motor starters, and test and maintain installations safely. The Odisha CHSE +2 VOC-ITV Wireman Control Panel case studies are 5 cases and about 3,785 words.
1DOL Starter Tripping on a Hot, Sealed Panel
A 7.5 kW, 415 V, three-phase squirrel-cage motor drives the main lathe in a fabrication shed. Its nameplate full-load current is 14.5 A.
728 words, about 4 min2High Earth Resistance at a Small Workshop
A small 415 V workshop feeds a 3.7 kW pump, a lathe and lighting from a distribution board whose earth bar is connected to one 40 mm diameter GI pipe electrode driven 3 m into the ground, with its top 0.5 m below grade. The installation has 32 A MCBs but no RCCB, and all machine frames are bonded to the earth bar.
746 words, about 4 min3Pricing and Varying a Four-Way Motor Control Panel
A small panel-building firm quotes for a 4-way motor control panel for a rice mill: one 63 A 4-pole MCCB incomer, three DOL feeders for 2.2 kW motors (9 A contactors, 4–6 A thermal relays, start/stop push buttons, run lamps), and one blank spare bay. The quoted rates are: CRCA sheet 2 mm, 3.0 m² at ₹700/m²; powder coating 3.0 m² at ₹250/m²; MCCB ₹2,400; contactors ₹850 each; relays ₹700 each; push-button sets ₹180 each; lamps ₹120 each; wire, lugs, busbar and terminals ₹1,800; glands and miscellaneous ₹450.
789 words, about 4 min4Low Insulation Resistance on a Borewell Pump Motor
A 3.7 kW, 415 V borewell pump motor has been idle for eight months. Before restarting, the wireman meggers the circuit at the starter with a 500 V insulation tester and records L1–E 0.8 MΩ, L2–E 0.9 MΩ, L3–E 0.85 MΩ and L1–L2/L3 50 MΩ.
702 words, about 4 min5Load Growth in a Tailoring Unit Supply
A tailoring unit in a rented building takes a single-phase 230 V supply through a 25 m run of PVC conduit from the meter board to a small distribution board. Connected load: six sewing machines at 0.37 kW each, two 1 kW steam irons (both may be used at once), eight 18 W LED fittings and three 75 W fans.
820 words, about 4 min