With this, the thunder surge current flowing through the lightning arrestor (1) is divided.
The lightning arrestor is installed between the transceiver and the antenna.
The invention concerns a lightning arrestor device for protecting an installation (3) powered by an electric transmission line (1).
A lightning arrestor or instrument transformer (13) is mounted, and the cables (10) are connected, on top of said upwards extension part (5a).
There are five chambers including the trapping zone which is made of lightning arrestor.
impulse spark-over voltage of a protector
impulse discharge current of a protector
nominal d.c.spark-over voltage of a protector
alternating discharge current of a protector
nominal impulse discharge current of a protector
The overvoltage protector is utilizable as lightning protector for telecable networks withstanding an overvoltage in the order of magnitude 10 kV or more.
A lightning protector for overhead electric lines comprises at least one of the following elements: a spark-arrester (111, 112), a ground lead and a device for the connection of electric cables.
If you live in a region prone to thunderstorms that will be a good idea to use a lightning protector between the outside antenna and the booster in order to protect it from a breakdown.
The subject of the invention is a surge arrester, and especially a low- voltage surge arrester.
An arrangement comprises a surge arrester (1, 1a).
The second connector is adapted to couple to a surge arrester.
A solid-core surge arrester includes a module assembly.
The invention relates to a surge arrester comprising a diverter element (1) with a shielding element that increases the creepage path, comprising at least one shield (6).
A surge protective device for the machine communication interface, for example to the control engineering system, is recommended here.
The working groups meeting of the IEC Surge Protective Device Committee (37A) in Chengdu (Sichuan) was also an opportunity to participate in two major events in China.
According to the NEC (2017) and the NFPA 79 (2018), the power supply for industrial machines that are equipped with safety circuits must be fitted with surge protective devices (SPD).
In particular, a Type 1 SPD is generally accompanied by a Type 2 SPD.
The number of additional SPDs to be installed is determined by:
Figure J40 shows the two possibilities for connection of an SPD.
An SPD must always be installed at the origin of the electrical installation.
Figure J39a below shows how to connect an SPD in the plastic enclosure.
When this distance exceeds 30 metres, an additional surge protection device (Type 2 or Type 3) should be installed near the equipment.
Then, the distance between that surge protection device and the equipment to be protected should be assessed.
Manufacturers must provide the table for coordination between the surge protection device and the associated protection device.
Surge protection devices that have Type-1 listed approval in accordance with UL 1449 do not need overcurrent protection (1).
Surge Protection Devices are used for electric power supply networks, telephone networks, and communication and automatic control buses.
The present invention relates to a wind turbine lightning protection system and to a wind turbine blade comprising a wind turbine lightning protection system.
Modern wind power installations are regularly equipped with a lightning protection system.
According to the method, it doesn't need to be grounded when the lightning protection is performed.
Provided is a lightning protection facility that can prevent damage resulting from self-induced oscillations.
This lightning protection installation will conduct any electrical charge that strikes the antenna into the ground.
arrester consisting of a horned spark gap
The lightning receptor and the lightning conductor are electrically connected by means of a connection area.
arrester consisting of a guard shield
The present invention relates to a practical plasma arrester.
The lightning conductor in its entire longitudinal direction as well as the connection area between the lightning conductor and the lightning receptor are electrically insulated in order to prevent lightning striking through the surface of the blade.
A lightning arrester is provided in the power supply, which improves the safety.
A lightning filter and electronic equipment are provided.
The interior of the overvoltage arrester is connected to an exterior area of the overvoltage arrester by means of the ventilation channel 2, wherein the ventilation channel is closed by means of a fusible element 3.
The invention relates to an overvoltage arrester comprising at least two electrodes 1.
A disconnector assembly (10) is provided for an arrester (13).
Capacitor behavior in continuous and alternating current
The insulator (10) may also be a lightening arrester consisting of stacked insulating discs.
But it can be compatible to enable the arrester rod to connect to ground via a gap.
The cut-off means (7) are connected in series to the lightning arrester (8).
The different variants of the structure of power transmission lines using said arrester are also disclosed.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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