"Industrial Load Management System Using MQTT Protocol for Real-Time Energy Optimization a, Thesis of Industrial management

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Fig. 3.6 Current sensor SCT-013 Working principle This current sensor(CT) is a type of transformer that is used to measure altemating current (AC). The alternating current in the primary produces an altemating magnetic field in the core, which then induces an alternating current in the secondary. The primary circuit is largely unaffected by the insertion of the CT. Accurate current transformers need close coupling between the primary and Secondary to ensure that the secondary current is proportional to the primary current over a wide current range. The current in the secondary is the current in the primary (assuming a single tum primary) divided by the number of tums of secondary.In the Fig. 3.7, ‘I' is the current in the primary. 'B' is the magnetic field, 'N’ is the number of ‘ums on the secondary. and 'A’ is an AC ammeter. 13 Here consider the wire whose current is to be measured as the is ‘I’ and the current transformer is the current sensor it has only air gap between the wire and itself. The flux produced by the wire produces current according to the turnings ratio that is K=NI/N2. Fig, 3.7 Principle of CS Overview Model Name: SCT013-000. ¢ Input Current: 100A. © Frequency: 5S0HZ-150KHZ. © Opening Size: 13 x 13mnv 0.5" x 0.5"(L*W). © Output Plug 3.5mm. * Dielectric Strength 6000V AC/Imin. 14