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Posté le 20/08/2019 08:53 | | China Automactic Sectionalizer manufacturers |
Medium voltage electronic sectionalizers AutoLink Save time, effort and money! The ROCKWILL AutoLink sectionalizer is an isolating device that automatically isolates the faulted section of the overhead network when a permanent fault occurs. If a temporary fault occurs, the AutoLink allows the upstream recloser or breaker to clear the fault without interrupting the circuit. Both AutoLink electronic sectionalizer and the wireless version of Autolink, AutoLink, are designed to improve reliability and service continuity. Key benefits Increased reliability and continuity of service, discriminating between temporary and permanent faults Inventory reduction: one size fits all current ratings Simple and quick installation without special tools Reduces maintenance time: field configurable and resettable Reduced operation costs Key features Only three voltage levels: 15, 27 and 38 kV Nominal current and number of counts settable by user No external power source required AutoLink family: single-phase, loadbreak, mechanical three-phase and wireless three-phase Independent of the time-current curve Overview The sectionalizer is applied in three phase power system with AC 50Hz and rated voltage 10-40.5kV. It is installed on distribution overhead line to isolate fault when corporated with recloser or circuit breaker. When fault occurs on the line, the faults current reaches or exceed preset threshold value, the sectionalizer can remember the tripping times of upstream recloser. When it reaches preset times, it drops down to trip automatically. Sectionalizer can drop down to trip automatically on the condition as given below: First, the faults current exceeds presetting pickup current. Second, the counting time reaches presetting value (1, 2, 3 or 4). Third, the circuit loses voltage and the current is lower than 300mA. The Sectionalizer will trip automatically if the aforesaid conditions occur simultaneously. If any of aforesaid conditions doesn’t occur, the Sectionalizer will not trip automatically. This sectionalizer uses micro-computer and operating trip mechanism and does not require external auxiliary supply. Technical data S/NNameUnitRDK10-12/D315RDK10-12/D200RDK-40.5/D200 1Rated voltageKV121240.5 2Rated currentA200200200 3Rated frequencyHz505050 4Pickup current ratingA8~400A8~400A8~400A 5Short time withstand current(RMS)KA101010 6Short circuit withstandtimes111 7Short time withstand current (PEAK)KA162020 8Counting timetime1, 2, 3, 41, 2, 3, 41, 2, 3, 4 9Max memory timeS202020 10Max reset timeS202020 11Permissible deviation of pick up current for memory rest time%±10±10±10 12Opening timems≤200≤200≤200 13Main circuit resistanceμ Ω≤400≤400≤400 14Mechanic lifeTime500500500 15Horizontal pulling force of terminalN250250250 16Manual open momentN·m—————— 17Manual open forceN≤120≤120≤120 18BIL(phase to ground)KV110185185 19BIL(between gap)KV11022022 20PFWV(phase to ground)dry KV559595 wet458080 21PFWV(between gap)dry KV55110110 wet459595 22PFWV of control circuitKV222 23Dirty proof gradeClassⅣⅢⅢ 24Ice proof thicknessmm≤7≤1≤1 25Pickup current (four classes) and Counting time can be set ——YESYES 26Mechanical interlocking for 3 phase devices and automatic reset ——YESYES 12/24kV IEC/ANSI 36/38kV IEC/ANSI InstallationChina Automactic Sectionalizer manufacturers website:http://www.china-rockwill.com/outdoor-switchgear/automactic-sectionalizer/
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