Assam HS Skill Electrical Mechanics and Electrician case studies
Assam HS Skill Electrical Mechanics and Electrician · Put your knowledge to work in context.
The Assam HS Skill Electrical Mechanics and Electrician credential is a higher-secondary vocational qualification for students who want hands-on electrical trade skills alongside their Class XI–XII study. It suits learners aiming at jobs or self-employment as electricians, wiremen, appliance repair technicians or maintenance helpers, and as a stepping stone to industrial training and apprenticeship routes. The Assam HS Skill Electrical Mechanics and Electrician case studies are 5 cases and about 5,083 words.
1Commissioning a 3 kW grinder on a long final circuit
A trainee at a government ITI workshop in Nalbari has to commission a 3 kW, 230 V single-phase grain grinder at the far end of a shed. The machine is fed from the main switchboard by a 45 m run of 2.5 mm² two-core copper PVC cable clipped to the wall, protected by a 16 A MCB.
938 words, about 5 min2Burning smell in a tea-estate labour quarter after eight months
A two-room labour quarter on a tea estate near Dibrugarh was wired eight months ago with surface PVC conduit, 1.5 mm² copper for lighting and 2.5 mm² copper for sockets. The service connection arrives as a 6 mm² aluminium conductor, and at the meter board the electrician twisted it together with the 4 mm² copper circuit wire, wrapped the twist with insulation tape, and pushed it into the conduit box.
1,003 words, about 5 min3Unbalanced loading on a rice mill's 100 kVA transformer
A rice mill in Barpeta is fed by a dedicated 100 kVA, 11 kV/415 V three-phase distribution transformer. The mill runs a 15 kW and a 7.5 kW three-phase induction motor, single-phase lighting, and a 5 kW single-phase husk blower.
958 words, about 5 min4A welding shop with a bypassed RCCB and a 14 Ω earth
A small fabrication workshop in Guwahati runs an arc welding set (415 V, three-phase), a 3 kW air compressor and hand tools. Last monsoon the 30 mA RCCB at the main board tripped repeatedly, so the owner's nephew removed it and joined the incoming wires directly.
1,040 words, about 5 min5VFD tripping on overcurrent on a pipe extrusion line
A PVC pipe extrusion unit near Guwahati runs a 7.5 kW, 415 V, three-phase IE3 motor driving an extruder screw through a gearbox; the nameplate current is 14.5 A. It is supplied from a 7.5 kW (17 A) VFD fed through a 415 V MCCB.
1,144 words, about 6 min