Application: Electrical Distribution System
Location: Metro Manila, Philippines
Product: PSP Series Surge Protection Device
Function: Surge protection & monitoring

With the increasing demand for electrical system reliability, effective surge protection has become essential for protecting critical equipment and ensuring safe operation.

Recently, a Prosurge PSP Series Surge Protection Device (SPD) was successfully installed in an electrical distribution system in Metro Manila, Philippines, providing reliable protection against transient overvoltages caused by lightning events and switching operations.

The PSP Series is designed to deliver high-performance surge protection with advanced monitoring functions, helping users quickly understand the protection status of their electrical systems. The built-in surge counter and clear status indication provide convenient operation and maintenance support.

As a professional manufacturer specializing in surge protection solutions, Prosurge continuously develops and supplies high-quality SPDs that meet international standards and serve customers across different industries and regions.

From commercial facilities to industrial applications, Prosurge is committed to providing reliable solutions that help protect electrical infrastructure and improve system safety.

Prosurge – Professional Surge Protection Solutions for a Safer Electrical Future.

Prosurge recently conducted an internal technical training session focusing on GDT (Gas Discharge Tube), one of the key components widely used in Surge Protective Devices (SPDs).

The training covered the basic principles, key characteristics and application considerations of GDTs in surge protection. It provided our R&D, engineering and quality teams with an opportunity to further strengthen their technical knowledge and understanding of critical SPD components.

As a professional manufacturer specializing in low-voltage SPDs, Prosurge places great importance on continuous technical development and employee training. We regularly organize training sessions covering SPD technology, critical components, international standards, testing requirements and product applications.

With extensive experience in UL and IEC standards, Prosurge is committed to ensuring that our products meet internationally recognized safety and performance requirements. Our SPD products have obtained certifications from internationally recognized organizations, including UL, TÜV and KEMA.

We believe that reliable surge protection starts with technical expertise.

Through continuous learning and improvement, Prosurge continues to strengthen its technical capabilities and deliver reliable surge protection solutions to customers worldwide.

Prosurge – Professional Surge Protection. Built on Expertise. Driven by Quality.

At Prosurge, we believe that a strong company is built not only on innovation and professional excellence, but also on the people who make it all happen.

Our Fun Committee plays an important role in creating a positive and engaging workplace environment. Through a variety of activities and team events, the committee provides opportunities for employees to step away from their daily routines, connect with colleagues, and share enjoyable moments together.

These activities may seem simple, but they have a meaningful impact. They encourage communication across teams, strengthen relationships among colleagues, and create a greater sense of belonging within the Prosurge family.

We are grateful to our Fun Committee for their creativity, enthusiasm, and dedication in organizing these activities. Their efforts continue to bring positive energy to our workplace and help foster a culture where people can work together, connect with one another, and enjoy the journey along the way.

At Prosurge, we will continue to invest in our people and build a workplace where teamwork, connection, and a shared sense of purpose are valued.

Together, we work hard, celebrate together, and grow together.

Recently, at a customer’s special request, our 20PTMOV150/S (thermally protected MOV), rated at Uc/MCOV 150VAC, was subjected to an abnormal overvoltage of 1000VAC. Under this extreme electrical stress far beyond its rated conditions, the 20PTMOV still tripped as designed, and the built-in Prosurge patented technology successfully extinguished the resulting arc, demonstrating a safe failure mode under severe fault scenarios.

Test Procedure and Key Observations

During the 1000VAC application, the MOV chip inside the 20PTMOV conducted due to overvoltage and quickly heated up. The thermal disconnector activated in a timely manner. At the moment of tripping, a brief arc appeared across the MOV circuit, but the built-in thermal mechanism promptly interrupted the circuit and extinguished the arc. No housing rupture, fire, or sustained short circuit occurred.

At 0.05 seconds into the test video, the clamp meter (measuring current) showed a momentary flicker, indicating that current briefly passed through the MOV chip during the tripping event. Immediately afterward, the current reading dropped to zero, confirming that the thermal disconnector had completely opened the internal circuit of the 20PTMOV. This phenomenon is critical – incomplete disconnection would allow the fault current to rise continuously, eventually leading to a short circuit and burnout of the SPD, or even a more serious safety incident.

Technical Significance

This test simulated an abnormal overvoltage far exceeding the SPD’s rated Uc/MCOV, placing high demands on the device’s thermal trip response speed, arc suppression capability, and fault isolation performance. The 20PTMOV’s ability to achieve complete disconnection under 1000VAC (approximately 6.7 times Uc/MCOV) fully validates:

Reliable operation of the thermal disconnector under extreme overvoltage conditions;

Effectiveness of the arc extinction design under high-energy discharge;

Achievement of a “fail‑open” safe state after a fault, preventing fire and secondary damage to the system.

Customer Value

For SPD manufacturers and end users, the “safe failure” feature of the 20PTMOV means that even in rare and severe electrical faults, the device actively disconnects itself from the circuit, minimizing risks. This provides a higher level of protection redundancy for applications such as power systems, industrial automation, renewable energy, and telecommunications base stations.

For more information about PTMOV products or safe failure testing, please contact our technical team via the company website.

As a leading manufacturer of surge protective devices (SPD), we specialize in delivering high-quality surge protection solutions and professional knowledge. We regularly conduct in-depth training sessions focused on surge protection technologies and international standards, including IEC 61643-11 and UL 1449.

Our training courses are also designed for our cusotmers seeking to deepen their understanding of SPD classification, selection, installation, and compliance requirements. Led by our technical experts, these sessions combine theoretical insights with practical application to ensure you stay ahead in the rapidly evolving field of surge protection.

Join us to enhance your technical expertise.

We are pleased to announce the successful container loading and dispatch of our premium PTMOV (thermally protected MOV) today. This shipment underscores our commitment to reliable, high-quality supply for our global partners. A smooth operation from warehouse to port reflects our team’s dedication and operational excellence. We extend our gratitude to our customers for their trust and our logistics team for their seamless execution.

Prosurge Thermally protected MOV is UL 1449 recognized Type 1ca surge protective device, it’s designed to open in the event of overheating due to an abnormal over-voltage or temporary over voltage (TOV) and will interrupt any abnormal current that may be encountered. It has Quick thermal response and perfect circuit cutoff function due to special thermal disconnector design with internal arc extinguishing device.

We are thrilled to announce that another batch of our high-quality PTMOV – thermally protected MOV has been successfully loaded and shipped!

From careful packaging to secure container loading, every step was carried out with precision and dedication. Each PTMOV unit represents our commitment to excellence, innovation, and reliability.

As these products begin their journey to our valued partners worldwide, we extend our sincere gratitude to our hardworking team and loyal customers for making this possible.

Stay tuned for more updates – where quality meets delivery!