gpvs -2024欧洲杯买球软件

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

technical parameters

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