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
Surge protector, also known as lightning arrester, surge protection device, SPD, etc., is an electronic device that provides safety protection for various electronic equipment, instruments and meters,
1. surge protector connected between phase lines (L-L) or between phase line and neutral line (L-N) is called differential mode connection protection. 2. surge protective device connected between phas
6.1.1 of GB/T 18802.12-2014: SPDs located at or near the starting point of the surge protection device should be connected at least between the following points: a) If there is a direct connection bet
surge protective device elements can be connected between L (phase line; also called live wire), N (zero line; also called neutral wire), and PE (protective wire), that is, relative phase, relative ne
The selection of surge protective device in Section 6.2 of the national standard GB/T 18802.12 includes the following six steps: 1. Select the Uc.UT.In.Iimp.Imax of the surge protector: (1) Maximum co
The rooftop distribution box of a building belongs to the LPZ0B zone in the lightning protection zone. So how to select the surge protector for the rooftop distribution box of the building? What model
Surge protectors are generally connected in parallel to the main circuit. They usually have high impedance properties. When TOV appears in the circuit, they will conduct and discharge surge current. T
(1) Article 3 of Section 5.4.3 of GB 50343-2012 stipulates that for AC power supply lines entering buildings, at the junction of LPZ0A or LPZ0B and LPZ1, such as the main distribution box of the line,
(1) Article 4.5.4, Article 3 of the national standard GB 50057-2010: A surge protector of Class II test should be installed on the power supply side of the switch in the distribution box. Its voltage
(1) Article 8 of Section 4.2.1 of GB 50057-2010: A surge protector of Class I test shall be installed at the main distribution box where the power supply is introduced. The voltage protection level of
Some applications require two or more surge protection device low-voltage lightning surge protectors to reduce the electrical stress of the protected equipment to an acceptable value (lower Up) and re
When selecting the appropriate voltage protection level value of the surge protective device low-voltage lightning surge protector, the surge tolerance of the protected equipment (or the impact immuni
(1) Under normal conditions, the continuous working current (Ic) shall not cause any personal safety hazards (indirect contact, etc.) or interfere with other equipment. (It is advisable to select a co
(1) The expected life of SPD low-voltage lightning surge protector: mainly depends on the probability of a surge exceeding the maximum discharge capacity of the SPD low-voltage lightning surge protect
(1) Protection distance: In order to determine the location of the surge protection device low voltage lightning surge protector (at the entrance, near the equipment, etc.), it is necessary to know th
(1) Maximum continuous operating voltage Uc: The maximum continuous operating voltage Uc of the surge protective device low-voltage lightning surge protection device should be greater than the continu
The electrical and electronic systems in buildings are very sensitive to transient, high-energy surges caused by lightning discharges. In order to effectively protect various electrical information sy
The TT power supply system refers to a protection system that directly grounds the metal shell of the electrical equipment, which is called a protective grounding system, also known as a TT system. Th
The lightning protection system generally uses the first-level surge protector, second-level surge protective device and third-level surge protection device of Class I, II and III tests. In addition,
Article 3 of Section 5.4.3 of GB 50343-2012 stipulates: For AC power supply lines entering buildings, at the junction of LPZ0A or LPZ0B and LPZ1 areas such as the main distribution box of the line, a
Products that meet the requirements of GB 18802.1- and GB /T 18802.21 and are tested by nationally recognized testing laboratories should be used. The location of the surge protector installation and
The national standard GB/T 18802.12, Section 6.2, includes the following six steps for the selection of surge protective device: 1. Select the Uc.UT.In.Iimp.Imax of the surge protector: (1) Maximum co
1. Long-line oscillation effect: IEC61643-12 "Surge Protectors for Low Voltage Distribution Systems - Part 12: Selection and Use Guidelines" states: The impact of oscillation on the protection distanc
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