Who produces low voltage surge arresters according IEC 61643

Jera Line, a Chinese factory established in 2012, offers comprehensive products and solutions for LV&MV Overhead Cables and Underground Cables. It has over 5000㎡facility area and a professional working team. Jera Line continues to produce protection accessories for low-voltage overhead lines, the low-voltage surge arrester is one of the satisfying works from them. The products are produced according to IEC 61643 and well - received in markets around the world .

What do you know about low voltage surge arrester?

A LV Surge Arrester (also called a Surge Protective Device, SPD) is a device designed to protect low-voltage electrical networks and equipment from transient overvoltages caused by electrical faults, switching operations, electrical faults etc. Their working principle is limiting voltage spikes as well as diverting surge currents to safeguard electrical systems.

What is IEC 61643 Standard?

IEC 61643 is a series of international standards issued by the International Electrotechnical Commission (IEC) that specify industrial standards for low voltage surge arresters (also called SPDs). The standards cover the testing, design, and application of LV metal oxide surge arresters suitable for various voltage levels and system types.

The series is divided into multiple parts, each disposing specific types of surge arresters. Jera Line offers low voltage surge arresters for Low-Voltage Power Systems (typically ≤1000 V AC or ≤1500 V DC), below are the most relevant secondary standards:

IEC 61643-11: Low-Voltage Surge Arresters for Low-Voltage Power Systems.

1. Mechanical & Safety Requirements

(1) Thermal Protection: LV surge arrester must disconnect safely if overheated.

(2) Short-Circuit Withstand: Must not explode during fault conditions.

(3) Status Indicators: Visual/remote signals for SPD failure (e.g., LED indicators).

2. Electrical Characteristics

(1) Uc (Max Allowable Voltage): Must be ≥ system voltage (e.g.,for SA-0.28/10, it should be 280V).

(2) Up (Protection Level): Must be low enough to protect downstream equipment (e.g., for SA-0.28/10, it should be 1100V).

(3) In (Nominal Discharge Current): for SA-0.28/10, it should be 10kA

(4) Iimp (Lightning Current, Buildings with lightning rods): Typically 12.5kA (10/350µs).

3. Testing Procedures

(1) Standard Tests

①　Impulse Current Tests: 10/350µs waveform (for SPD apply to buildings with lightning rods )

②　Operating Duty Test: SPD must withstand multiple surges

③　Thermal Stability Test: Ensures no fire risk during failure

(2) Optional Tests

①　TOV (Temporary Overvoltage): Verifies SPD behavior during grid faults

②　End-of-Life Test: Simulates aging under repeated surges

4. Global Adoption

IEC 61643 is widely adopted in Europe, Asia, and many other regions. In the U.S., similar standards include UL 1449 (for power surge arresters) and UL 497 (for communication surge arresters), which is same as IEC standards but may have small differences.

What kind of metal oxide surge arresters does Jera Line make according to IEC 61643?

1. Key models:

• SA-0.28/10

• SA-0.5/10

• SA-0.66/5

Jera Line offers low-voltage surge arresters for LV OH line applications which belong to metal oxide surge arresters, typically apply to protect low-voltage power distribution systems. This surge arrester is characterized by its cost-effectiveness, rapid response, and compact dimensions.

1. Technical Specification

2. Key Features

• Don’t need any grading systems

• Prevent power systems from both overvoltages and under-voltages.

• Protecting the equipment from transient events such as lightning strikes or current surge etc.

• No need any frequent maintenance and saving the cost in the long term.

• Prevent any damage (e.g., electrical fire)caused by system failure.

• Extend the service time of electrical system components.

3. partner device

• When these low-voltage surge arresters are paired with IPCs (ZOP-9.22(L), ZOP-23, ZOP-30), they enable quick-and-easy installation.

Why choose Jera Line as your low voltage surge arrester producer?

1. Direct factory from China, eliminate middlemen for more efficient direct communication and more economical prices.

2. Professional engineers and facilities keep the production high - quality and efficient.

3. As for low voltage surge arresters, Jera Line produces strictly according to the international standard IEC 61643.

4. Offer both OEM & ODM service.

5. Business partners are spread all over the world.

Conclusion

Although many companies produce low voltage surge arresters, Jera Line is still one of the best choices for collaboration because of its affordable price, excellent quality, quick response and high professionalism.

Reach out to us for more information!