Electrofusion welding is the name given to resistive implant welding of thermoplastic pipes. It is one of two main techniques used for the joining of polyethylene gas and water pipes. Electrofusion welding employs fittings that are placed around the joint to be welded. Metal coils are implanted into the fittings, and electric current is run through the coils to generate heat and melt part of the pipes, forming a joint upon solidification. There are two possible fittings used in electro fusion welding: couplers and tapping tees (electrofusion saddles). Electrofusion Machines/Electrofusion Welders are used for electrofusion fittings welding. Electrofusion Fittings are a heat treatment method compared to butt fusion methods and are used to generate heat. Electrofusion welding is a type of pipe welding and polyethylene fittings, in which there are special connections that have electrical resistance wire to create welding melting temperatures. The electric current is transmitted through the electrofusion welding eequipment and through the control box to the two ends of the connection. Yuda offers a fulll range of EF315 HDPE Electrofusion Welders, EF500 poly pipe electrofusion welding machine, EF630 HDPE Fitting Electrofusion Equipments and EF800 Electrofusion hdpe fittings machines Electrofusion Machine,Electrofusion Equipment,Electrofusion Welding Machine,Electric Fusion Welding Machine WUXI MEIERTE MACHINERY TECHNOLOGY CO.,LTD , https://www.wxpipefusionweldings.com
Network signal lightning protection device <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> Network signal lightning protector Ethernet communication lightning protector can be used for lightning protection of network interface of communication equipment. , Play lightning protection. 
Installation Precautions: Lightning protector is installed in the protected inlet port, in series with the network signal line, the input terminal is connected to the external lead, the output terminal is connected to the protected equipment, and the “PE†lead on the lightning arrester must be connected to the nearest The earth terminals are reliably connected to ensure lightning protection is effective.
Digital signal lightning protection device <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> The external signal is terminated to the input line, the output is terminated to the protection device, and the PE terminal is to be reliably connected to the earth lead. 
Figure II: Digital signal lightning protection device wiring diagram
Analog signal lightning protector
The lightning protection of analog signals is based on the different characteristics of sensors, transmitters, and signal collectors and can be used for lightning protection of 2- to 4-wire analog signal lines. The terminal wiring lightning arrester is suitable for indoor installation; it is mainly made of stainless steel lightning arrester suitable for outdoor installation, and has a fully enclosed structure that is resistant to acid and corrosion. 
Figure 3: Installation of lightning protection device for analog signals
SPD <br> <br> video composition which is a video signal SPD and AC / DC power supply arrester as one, become the imaging means and a video surveillance system generation apparatus compact, multifunction anti Lei products, the use of new types of lightning protection components, constitute multiple protection circuits, applicable to a variety of equipment for lightning protection devices and interface forms. 
Figure 4: Video combination signal wiring diagram
It should be noted here that all lightning protector installation wiring must be well grounded, and regular safety inspections should be conducted to ensure reliable lightning protection.
Kejia talk about how to connect several lightning protection devices
As we all know, the signal lightning protection device is used to protect a variety of electrical equipment in the power system from lightning over-voltage, over-voltage operation, transient over-voltage power frequency damage and an electrical appliance. With the popularity of signal communication equipment applications, signal lightning protection devices have become a weapon to protect electronic devices. However, many people understand the signal lightning protection wiring harness. The following small series will use the wiring diagram of the lightning protection device of Kejia Electrical Signaling Co., Ltd. as an introduction:
Figure 1: Network signal lightning protection device wiring diagram