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The test system is designed and customized to carry out 2.55*In test as per Table 7 (test c) of IEC 60898 (also mentioned for routine testing of MCBs. The test is done at dc current to exactly analyze and correct the bimetallic properties of the MCB as far as thermal tripping is concerned. The unit comes with a pneumatically operated test fixture with in-built dc stepper motor that is controlled by a micro controller / PC to calibrate the breaker into a narrow tripping band programmed by the user.
The constant current supplied to test the MCB stays within 0.3% (line & load regulation). Tripping of individual Miniature Circuit Breaker will not interrupt current even for a moment at other stations
The test bench can be customized as per the number of stations: 1 (stand alone), 2, 4, 6, 8, 10 and 12 stations. Additionally, the product can be micro-controller based with each microcontroller controlling an individual station, or a PC based wherein the PC controls all the stations simultaneously and independently of each other.
The test bench is specially built for low voltage- B, C & D curve MCBs. Specially designed custom built jigs are able to accommodate single, double, three and four pole MCBs as per IEC 60898. Decades of experience has helped us to design current source (transformer) in a special way such that good current regulation and high accuracy is ensured with a variable range without the use of any variable transformer in the system. The product is better than the competition with conventional technology at a lesser price!
The cycle (test) time for 4 pole MCB is around 7 seconds.
Drop down menu in the software to once select the type (rating or calibre) of MCB: Rest of the test parameters get selected automatically (User can simply jump from one type of MCB to other instantaneously).
Software: NI LabVIEW based for user interface, password protection and user hierarchy, settings selection, automatic testing process control & report generation exported to MS-Excel
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