Smart Street Light Surge Protector Setting Solution
How to design the setting scheme of the surge protector for smart street lights? Smart street lights are an important part of smart cities. They have an inherent advantage in the number of IoT access points and are excellent access points for smart cities. By acquiring, analyzing and applying various types of big data information in the urban road network, a smart perception network map is constructed. Smart street lights will become an important carrier for 5G micro base stations, smart car networking, edge computing, etc.; driven by smart cities, new infrastructure, and 5G network construction, my country's smart street light construction projects are blooming all over the country.
Since smart street light poles are outdoors for a long time and are easily targeted by lightning, how to prevent the pole equipment from being struck by lightning is an important issue. According to the distribution and power supply characteristics of smart street poles and the relevant national lightning protection design standards, the setting scheme of the surge protector for smart street lights is set as follows:
1. 380V power supply system: Use a three-phase 1-level composite surge protector with model YSPD-15HA/3PN, with the following specific parameters: Uc: 385V; Iimp (10/350μs): 15kA; Up: ≤1.8kv.
It is necessary to configure the surge protective device backup protection device SSD, model ESCB-20TA/4P, the specific parameters are as follows: Iimp (10/350μs): 15kA; power frequency tripping current Ii: 3A; SPD Iimp impact current does not trip, power frequency small current quick-break capability, SSD must have a working status indication window.
2. 220V street light distribution box: Because it is placed outdoors, a single-phase 1st-level composite surge protector model YSPD-15HA/1PN is selected, the specific parameters are as follows: Uc: 385V; Iimp (10/350s): 15kA; Up: ≤1.8kv.
It is necessary to configure the SPD backup protection device SSD, model: ESCB-20TA/2P, the specific parameters are as follows: Iimp (10/350μs): 15kA; power frequency tripping current Ii: 3A; with SPD's Iimp impact current tripping, power frequency small current quick-break capability, SSD must have a working status indication window.
3. 220V street light pole bottom distribution box: select the single-phase 2-stage voltage-limiting surge protector model YSPD-40C/1PN, the specific parameters are as follows: Uc: 385V; In (8/20μs): 20kA; Imax (8/20s): 40kA; Up: ≤1.5kv.
The smart street light surge protection device setting plan needs to be configured with an SPD backup protection device SSD, model: ESCB-40TC/2P, with the following specific parameters: Imax (8/20s): 40kA; power frequency tripping current Ii: 3A; it has the SPD's Iimp impact current without tripping, and the power frequency small current quick-break capability, and the SSD must have a working status indication window.
