gpvs rcfd -凯发一触即发

we mentioned
solar power system dc junction box and component requirements
the environment temperature protection appliances (circuit breaker)
◆  50 ℃ (ul 489 b)
in line with the requirements of ul 489 b performance
◆ according to the multipole photovoltaic circuit breaker, isolating switch manufacturer's instructions for wiring should stipulate a multipolar series (when the cross-sectional area and length of the wire)。
◆ rated voltage at 601 ~ 1000 v pv breaker, should be carried out in accordance with the ul489 circuit breaker rating of 100%。
◆ multipolar photovoltaic circuit breaker or switch each pole should be tested separately。
in accordance with ul 489 b extreme environmental cycling test：
◆ 50 high and low temperature cycle, each cycle includes 15 minutes to 40 ℃ low temperature and followed by 15 minutes of 90 ℃ high temperature (any appropriate temperature gradient).the sample (s) at the end of the 50 cycles, will be in 23 ℃ 3 ℃ keep at room temperature for at least three hours.when placed at room temperature for 3 h, 200% of the calibration current in the circuit breaker will be article ul4897.1.2.2 test, tripping time should be no more than ul489 the requirement in table 7.1.2.2.1 allowed range。
runtime environment
◆ operating temperature: - 25 ℃ ~ 50 ℃ (ul 489 b)；
25 ℃ ~ 70 ℃ (the measured temperature)。
◆ storage temperature: - 45 ℃ ~ 70 ℃。
◆ temperature change is big, heat bilges cold shrink significantly。
◆ special customized according to actual situation。
working voltage
◆ use of the environment impact voltage dc500v ~ dc1000v, main circuit switch usually adopts the ui = dc1000v。
◆ junction box generally require automatic reset, can cut micro with reset function。
◆ 汇flow of isolating switch and isolation should be commonly take dc1000v breaking load。
high degree of protection
◆ plant set up in the desert, part used in damp and rainy region has high requirements of the corrosion, cabinet put oneself in another's protection grade requirements as much as: ip65。
high sea dials high
◆ the qinghai-tibet plateau is higher than the average elevation of 4000 meters, heat dissipation, rated voltage drop obviously。