ITI Solar Technician Electrical (AITT Theory) case studies
ITI Solar Technician Electrical (AITT Theory) · Put your knowledge to work in context.
The ITI Solar Technician Electrical trade theory paper is the All India Trade Test (AITT) theory assessment taken by trainees who have completed the NCVT-recognised Solar Technician (Electrical) trade under the Craftsman Training Scheme. It tests whether a trainee can reason about solar photovoltaic work the way a working technician must: reading a circuit, selecting and connecting modules, sizing a battery bank and inverter, commissioning a rooftop system safely, and diagnosing faults afterwards. The ITI Solar Technician Electrical (AITT Theory) case studies are 5 cases and about 4,018 words.
1String Voltage and DC Cable Check for a 5.4 kWp Rooftop Array
A 5.4 kWp rooftop grid-tied system uses ten 540 Wp modules in one string on MPPT input 1. Module data: Voc 49.6 V, Vmp 41.8 V, Isc 13.9 A, Impp 12.95 A, Voc coefficient -0.275%/°C and Vmp coefficient -0.35%/°C.
777 words, about 4 min2Battery Bank Autonomy and Weak Block in an Off-Grid Telecom Repeater
A remote telecom repeater runs on a 24 V DC bus with a continuous load of 3.5 A, giving about 84 W and 2.02 kWh per day. The battery bank has eight 12 V, 150 Ah VRLA blocks arranged as four parallel strings of two blocks in series, giving 24 V and 600 Ah nominal?
820 words, about 4 min3Earthing, DC Protection and Bonding for a Coastal 10 kWp Rooftop System
A 10 kWp grid-tied rooftop system on a coastal building is earthed through one 3 m long, 50 mm diameter GI pipe electrode. The measured earth resistance is 18 Ω.
868 words, about 4 min4Hot Module, Open Bypass Diode and Output Loss in an 8 kWp Array
An 8 kWp array has two strings of ten 400 Wp modules. Each module has Voc 46 V, Vmp 37 V, Isc 9.5 A and Imp 8.6 A.
789 words, about 4 min5Export Limiting and Net-Metering Commissioning for a 100 kWp Commercial Rooftop
A 100 kWp commercial rooftop system uses two 50 kW three-phase inverters connected to a 415 V, 50 Hz network. At noon the inverters produce 96 kW AC and the site load is 10 kW, so the net meter shows 86 kW export.
764 words, about 4 min