Microprocessor based auto source changeover cum current limiter with dual source energy recording. It has contactor logic incorporated with electrical and mechanical interlock with current ratings up to 63a. Rangeratings 16a to 80a eb, 0. 5a to 80a dgframes 1, 2, 4, 3 dg, 3 eb, 5versions 1, 3 eb, 1 dgstandardsconforms to iec 60947, 6, 1key featurescurrent ratings 1amps to 63amps continuous duty when load on eb/dg. While monitoring the generator supply, It allows only a limited load and functions as load limiter as per desired current factory set . Microcontroller based design. Contactor logic up to 32a. Led indications for presence of eb & dg. No of electrical operations, 2. 1 million operations. No of mechanical operations, 10 million operations. Degree of protection, Ip20. Conditional short circuit current, 3ka. Under and over voltage protection on both eb and fixed under, Dg side voltage 160v ac /over voltage 250v ac settings can be configured at factory optional . Load changeover, Automatically based on priority of source selection eb to dg or vice versa. Applicationsthe electron accl is a fully automatic, High precision system installed residential complexes, In apartments, Commercial buildings etc.