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Pole-mounted Circuit Breaker
Zhejiang Junwei Electric Co., Ltd.
Zhejiang Junwei Electric Co., Ltd.

JUNW D165T/D265T Digital-triggered Pole Circuit Breaker with Block

D165T/D265T Pole-Mounted Circuit Breakers (Upgraded with Shunt Trip Unit)
1.Upgraded Core Design & Compliance
The D165T and D265T are enhanced 4-pole (3 protected poles) air-insulated disconnectors with a metal baffle arc-quenching chamber, now integrated with an advanced shunt trip unit for smarter control. Encased in a wind and rain-resistant glass fiber reinforced polyester enclosure, they fully comply with the HN 63-S-11 standard and are purpose-built for pole-mounted outdoor power distribution.
2.Tailored Electrical Specifications
Both models operate at 440V rated voltage with differentiated performance:
•D165T: 165A rated current, 4000A breaking capacity, 6800A making capacity, 1 output, supporting 25/70 mm² cables.
•D265T: 265A rated current, 6400A breaking capacity, 11700A making capacity, 2 outputs, supporting 50/150 mm² cables.
They retain robust dielectric strength: 20kV impulse withstand, 10kV at 50Hz, and 4kV inter-pole insulation.
3.Shunt Trip Unit: Key Upgrade Advantages
The integrated shunt trip unit is a critical improvement over the original model, enabling remote electrical tripping (e.g., triggered by fire alarm systems or control room buttons) – replacing the limited manual-only operation. This allows fast, automated emergency shutdowns, drastically enhancing grid safety and operational flexibility for unattended outdoor installations.
4.Enhanced Safety & Dual-Mode Reliability
During opening, it maintains electrical connection between the transformer neutral line and busbar; when closed, a specialized spark gap limits BT neutral point voltage rise (supports >10kV applications). Combined with shunt trip protection, it delivers comprehensive fault and emergency safeguards, with a manual override backup ensuring reliable dual-mode operation in harsh outdoor environments.

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Zhejiang Junwei Electric Co., Ltd.
Zhejiang Junwei Electric Co., Ltd.

Zhejiang Junwei Electric Co., Ltd. is built on the core values of quality, innovation, and integrity. Over the past 19 years, these principles have guided our growth into a manufacturing and trading enterprise committed to delivering dependable products.

If people and businesses in French-speaking African countries have their lights on, they are going to need what we offer. We will be here to provide the products and services they need, new or old", said Shuping Zhang, the founder of Junwei Electric. It is our mission and passion to provide customers with a quality product from a staff with the expertise to back it up.

Zhejiang Junwei Electric Co., Ltd specializes in solutions. Since 2007, Junwei Electric has made a commitment to our customers that is simple: reliable products, reliable people and reliable services with high value and suitable prices. With ample inventory and a strong supplier network, Junwei is dedicated to delivering a smooth experience. All products are safety-certified and ready for use.

We specialize in the R&D and manufacturing of high- and low-voltage electrical products, including circuit breakers, meter boxes, and fuses. Our products are exported to Cameroon, Côte d'Ivoire, Morocco, Burkina Faso, and other African countries. We have also built long-term, stable partnerships with power authorities in Senegal, Gabon, Benin, and Guinea, serving as a key supplier of China Circuit Breaker products in China for these markets.

We have a dedicated R&D team and laboratory focused on product innovation and technical improvement. We believe that progress comes from real-world needs, curiosity, and a commitment to continuous refinement. All finished products pass multiple rounds of inspection to ensure consistent performance and reliability.

We are not just a Circuit Breaker Factory , but a partner in reliable electrical solutions. Supported by a comprehensive after-sales service system and efficient supply chain management, we have earned the long-term trust of our overseas customers. Our commitment is simple: provide safe, durable and cost-effective electrical solutions, bolstered by our expertise and care.

Our reputation has been earned through a steady focus on quality. Innovation drives us forward; reliability is what we stand by. All of our production and quality management systems meet or exceed CE and ISO standards. The products you receive are certified, safe, and ready for installation.

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