Last week, Telecom announced that it will achieve full coverage of the 800MHz LTE network in 2017, thus becoming the first 4G network relying on low frequency, further enhancing its advantages in signal coverage.
According to the C114 report, the Ministry of Industry and Information Technology issued a document recently, and approved China Unicom to adjust some frequencies for LTE networking.
The so-called partial frequency is "agreement to Unicom to adjust the 900MHz, 1800MHz and 2100MHz frequency bands for LTE networking."
After consulting the information, I learned that Unicom got the qualification to build 900MHz FDD LTE in June this year, and the telecom 800MHz at the same time, but when Telecom was an official card, China Unicom only "test card", and now a bowl of water is flat.
At present, 900MHz is the Unicom GSM network bearer. How to accelerate the rapid migration of 3G/2G users to 4G to release spectrum resources is also the next priority of Unicom.
KNBL1-32 Residual Current Circuit Breaker With Over Load Protection
KNBL1-32 TWO FUNCTION : MCB AND RCCB FUNCTIONS
leakage breaker is suitable for the leakage protection of the line of AC 50/60Hz, rated voltage single phase 240V, rated current up to 63A. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, it will automatically cut off the power within 0.1s to protect human safety and prevent the accident due to the current leakage.
leakage breaker can protect against overload and short-circuit. It can be used to protect the line from being overloaded and short-circuited as wellas infrequent changeover of the line in normal situation. It complies with standard of IEC/EN61009-1 and GB16917.1.
KNBL1-32 Residual Current Circuit Breaker,Residual Current Circuit Breaker with Over Load Protection 1p,Residual Current Circuit Breaker with Over Load Protection 2p
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