How to solve the problem of overvoltage in the medium-voltage distribution network?

Friends who do network distribution projects have probably encountered such a headache–

The American box transformer and the buried branch box were used, and the cable elbow joint was broken through. Power outages, burning equipment, frequent overhauls, operation and maintenance costs have soared all the way, and the stability of power supply has also been affected.

The root cause of the problem often lies in the operating overvoltage generated by lightning shock and switch load division. These two types of overvoltages have large energy and come quickly, and the cable accessories are the first to bear the brunt.

In response to this on-site pain point, ANHLUNG Anhuang Power has launched ADTBLQ-17/50  single-pass elbow plug-in lightning arrester, which is specially designed to provide supporting protection for American box transformers and cable accessories.

How does it play a protective role?

This lightning arrester can be directly installed in the medium-voltage cable circuit with the load elbow connector and the insulation cap, which is equivalent to adding an overvoltage protective barrier to the distribution network.

Specifically, its protection mechanism is divided into two layers:

First, suppress the overvoltage of the operation. A special arc extinguishing component is equipped internally. When the load opening and breaking action occurs, the arc extinguishing component will release the arc extinguishing gas, effectively suppressing the arc, thus reducing the damage of the switch operation to the cable accessories.

The second is the release of lightning surges.

When struck by lightning, the internal MOV zinc oxide resistor acts quickly to release the impact current, limit the residual voltage, and protect key equipment such as rear transformers and cables.

How about the materials and processes?

The main body of the lightning arrester adopts independent formula EPDM rubber and an integrated molded semi-conductive shielding layer, which meets the ANSI/IEEE 592 standard.

This means that its anti-aging and waterproof performance can stand the test in buried and outdoor humid environments, and its long-term operation is stable and reliable.

Landing details that customers care about

✅ The standard conforms to IEEE386

Overseas power distribution projects can directly meet the requirements of project acceptance without worrying about standard docking.

✅ 100% full inspection from the factory

Full tests of power frequency withstand voltage and local discharge are done one by one, with periodic X-ray detection. One QR code, one item, and the project quality inspection and traceability are convenient and fast.

✅ Set delivery, ready to pack out of the box

The body of the lightning arrester, silicone grease, cleaning paper, installation wrench, instruction manual, qualification certificate and test report are all complete. After receiving the goods on the construction site, it can be installed directly without purchasing additional accessories.

✅ Support customization and branding

Small changes or new customizations can be made according to the needs of the project. OEM/ODM branding service is open to engineering integrators.

Applicable scenarios

This single-pass lightning arrester with 17kV rated voltage and 50kV lightning impact residual voltage is a common supporting part of North American-style medium-voltage cable system.

It is widely used in lightning protection and overvoltage protection of transformers, ring network cabinets, underground cable lines.

Need technical information or inquiry?

If you are doing the distribution network project, need to check the installation size, test parameters, or want to inquire in bulk, welcome to contact us to obtain complete drawings and technical information.