Currently power plants, substations DC feed network multi-tree structure, electrical equipment within the station from the battery, usually after three distribution per level distribution mostly uses the DC circuit breaker for protection appliances; Because the DC circuit breaker protection on the lower operating characteristics do not match, the DC system is running, when the lower short-circuit fault occurs when electrical equipment is often caused by a DC circuit breaker on the grade trip, causing other feeder line outages, thereby causing the substation primary equipment such as high-voltage switchgear, transformers, capacitors and other accidents; country in order to prevent the DC circuit breakers and other electrical operating characteristics of DC protection does not match the potential threat, the national grid Biotechnology [2005] No. 400 "State Grid Corporation of eighteen major grid anti-accident measures "in the eleventh, thirteen explicitly anti-accident measures proposed to strengthen the various circuit breakers, fuses accident prevention and management; clothes and run it on the DC protection of electrical characteristics of the test must be carried out safety second to ensure consistent performance and design to ensure the correctness of the DC circuit with differential. My company developed according to market demand introduced a suitable power plants, substations and field use, portable, high degree of automation of the DC circuit breaker safety second characteristic tester, for DC operation and maintenance departments to provide protection of electrical operating characteristics of the test means, DC protection of electrical operating characteristics and should be verified with the differential in order to improve the reliability of the DC system operation, to ensure safe and reliable operation of the grid. Features Functions Features 1, with powerful PC test software, test PC through the RS232 serial cable to connect with the instrument, all the tests carried out in the software operation. 2, upon request, automatically generate stable current output, fast response time. 3, automatic measurement in a variety of current circuit breaker tripping time and automatically draw circuit protection characteristic curve (On second curve). 4, you can select the whole point of testing and pumping point test. Snapshot test, two points can be automatically drawn Ann second curve, and compared with the standard curve determine crowbar Ann second characteristic is qualified. 5, you can connect multiple short fuse and short circuit or DC connection with the experiments done in steps, verify steps meets GB with 2 to 4 requirements. 6, the tester applies to the rated current of 1A ~ 100A DC circuit breaker safety second characteristic test can be used to 6A ~ 100A DC fuse safety second characterization testing. 7, the test is completed can automatically generate word or excel document format test reports, safety second characteristic curve can be saved or printed directly technical parameters and selection table Technical Parameters And Selection Tables SB-AS01-type SB-AS02-type SB-AS03-type work Power AC 380V ± 15% AC 220V ± 15% DC 220V ± 10% maximum output current 1000A 300A 300A Output Current Stability ≤ ± 1% ≤ ± 1% ≤ ± 1% Test current range 0 ~ 1000A 0 ~ 300A 0 ~ 300A Current Response Time <5ms <5ms <5ms Output voltage DC 12.5V DC 12.5V DC 12.5V time recording range 1ms ~ 1000s 1ms ~ 1000s 1ms ~ 1000s minimum time resolution of 0.1ms 0.1ms 0.1ms Test Method Automatic Automatic Automatic Meter Size 590mm ⅹ 300mm ⅹ 470mm 490mm ⅹ 300mm ⅹ 370mm 490mm ⅹ 300mm ⅹ 370mm Weight 30kg 20kg 20kg instrument grade aluminum box packing high grade aluminum boxes aluminum boxes Shenzhen weblogs Technology