4g cell phone jammer In the base station construction, such as conditions permit, or should be preferred national electricity grid capacity powerful line, even the wild mountain station, high-pressure direct delivery to the base station dedicated transformer, if appropriate matching transformer capacity, low-voltage power lines from the appropriate side, it would be is the best of. (Low voltage side of the transformer capacity and power lines matching the distance, mainly on account of indoor air conditioning voltage fluctuations from the base station due to frequent stops thus not too abnormal)
Selection of rural electricity, civil life of electrical, industrial and mining production of electricity should be avoided and a large load inductive or capacitive load line and then, in order to avoid excessive voltage fluctuations or surges occur frequently situation. 4g cell phone jammer
AC rack power system and the internal base of the inlet and outlet of the connection site, we do not think that after the initial installation of its reliability will once and for all, check these sites actually really have unexpected harvest inspection every pit stop.
Rack power supply system of choice for AC contactors, circuit breakers, fuses and air switch selection, design protection circuit design AC power detection circuit, lightning and anti-surge measure of choice, in fact, each supply manufacturers program is good and bad. As the level of maintenance personnel should have made a different maintenance programs for different devices, because as a manufacturer will definitely be using a penny stock to deal with the texture of the equipment they supply.
For those particular sites often appear abnormal, should special attention, such as shortening the inspection period, prepare inspection records, special maintenance, if necessary by appropriate exchange regulator with equipment and anti-lightning surge equipment.
Lightning protection measures for the implementation of 3.2
General characteristics of mobile base stations in previously has said that the mobile station can not all be built in the electrical protection are intact buildings. Because in order to fully enable the base station to improve signal coverage, its construction sites must comply with the requirements set up in place.
In some special places - such as a high incidence of lightning wild mountain station, which will inevitably cause harm to the power supply system is susceptible to lightning, while its RF lead is lead by an outdoor room, destruction point is also lightning. If protective measures can not be effectively implemented, but suffered a lightning abuse, ranging from causing failure of the system, it may cause heavy damage to the system. For operators, the loss is self-evident. 4g cell phone jammer
Measures need to be implemented in the following main points:
First, the protection of the AC power supply. Now most of the base station mains were first introduced into the small wall-mounted distribution box, this is above the average for the province thunderstorm intensity provinces (more than 40 days annual thunderstorm days, there are 51-85 year statistics show that the province annual thunderstorm days Changsha was 45.6 days, 55.1 days for Hengyang, Yongzhou was 64.9 days, Changde and Huaihua for 49.8 days, Chenzhou was 61.5 days, Yueyang was 42.5 days, Shaoyang 57 days, Yiyang 47.3 days, Zhuzhou for 50 days), when conditions should consider equipped with special mine me, at least, access should be considered to achieve maximum flow capacity 100kA the SPD (SPD) in the power distribution box, and rack power systems manufacturing plant is equipped with the largest currently generally pass the flow capacity of 40kA SPD (SPD), AC input rectifier module is also equipped with varistors are usually so gradual protection, generally for the reliable operation of the power station equipment is able to play its due protection.
But it should be sufficient for the electrical connection of these devices as maintenance personnel in the inspection and the device itself in good condition to be checked and recorded, the need should be timely updated.
Second part of the RF cable protection. We know that the RF input of the base station is relatively weak, lightning is also more sensitive to parasitic conduction disturbances produced by lightning may also cause failure or damage to the base station control equipment, so in addition to the need to use a special radio frequency cable lightning protection products, should also attention to its good resistance shield grounding careful to check and guarantee.
Third, lightning protection and grounding. About lightning protection and grounding mobile communication base station, Ministry of Information Industry is specifically designed to regulate the industry standard. Such as requirements for ground facilities for the AC system power supply requirements, power lines and the introduction of methods and grounding requirements, tower lightning and grounding requirements, the antenna feeder system grounding requirements of the signaling system grounding requirements of the building physical grounding requirements of a variety of metal components within the engine room grounding requirements of the network and grounding requirements, docking ground, grounding lead, ground pool line grounding resistance requirements and so on. When these specifications generally base station construction will be met. 4g cell phone jammer
Operation and maintenance personnel as the most important of these measures is to ensure long-term effective, the most practical work is to check and ensure timely compliance with the grounding resistance and meet the requirements.
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