Haryana BSEH Secondary NSQF Power case studies
Haryana BSEH Secondary NSQF Power · Put your knowledge to work in context.
The BSEH Secondary NSQF Power Sector credential is a vocational qualification offered within Haryana Board of School Education's NSQF (National Skills Qualifications Framework) stream at the secondary level. It is designed for Class 10 students and school-leavers who want a recognised, skill-oriented qualification that leads either into entry-level work in the power sector or into further technical study such as ITI or polytechnic programmes. The Haryana BSEH Secondary NSQF Power case studies are 5 cases and about 3,472 words.
1Tingling shock at a damp practical bay: why the MCB stayed silent
At a BSEH NSQF Power workshop, a first-year trainee is asked to replace a damaged 230 V single-phase switch board in a practical bay. The concrete floor is still damp from mopping.
718 words, about 4 min2Adding a geyser and AC to a 1.5 mm² socket circuit in a tailoring unit
A small tailoring unit in a Haryana village has a single-phase 230 V supply protected by a 32 A MCB. The existing wiring is 1.5 mm² copper PVC cable in buried conduit feeding three 6 A sockets through a chain of looped joints, and two junction boxes were plastered over during a recent wall repair.
711 words, about 4 min3Pump motor tripping the submain MCB on start: is a bigger breaker the answer?
A 7.5 kW, 415 V, three-phase squirrel-cage pump motor at a tubewell is fed by a 4 mm² copper cable about 35 m long from a submain board. The submain is protected by a 32 A Type B MCB and is itself fed from a 63 A Type B MCB at the main board.
715 words, about 4 min4100 kVA transformer at 112% load with one hot phase and a new tubewell request
A 100 kVA, 11 kV/433 V, three-phase ONAN distribution transformer with a declared 55 °C temperature rise supplies a mix of domestic and small industrial consumers. On a summer afternoon, the measured secondary current is 150 A on two phases and 170 A on the third, the power factor is 0.82, and the top-oil temperature is 92 °C.
618 words, about 3 min5Three instrument readings that misled an apprentice on a pump circuit
An apprentice is sent to a farm shed where a 230 V socket circuit feeding a 1 HP monoblock pump has stopped working. At the socket, his digital multimeter reads 231 V between line and neutral and 230 V between line and earth, but the pump does not run.
710 words, about 4 min