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Home / Products / D165T 4-Pole Low Voltage Pole-Mounted Circuit Breaker with Digital Trip Unit

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D165T 4-Pole Low Voltage Pole-Mounted Circuit Breaker with Digital Trip Unit

The D165T 4-Pole Low Voltage Pole-Mounted Circuit Breaker is designed for reliable protection of distribution transformers and low-voltage overhead power networks. With a 440V rated voltage, 165A rated current and 4-pole configuration , this outdoor circuit breaker provides dependable protection against electrical overloads, short-circuit conditions and phase-related faults.

Equipped with a digital trip unit , the D165T allows protection settings to be matched to transformer applications. The design is suitable for transformer protection applications involving capacities such as 50kVA, 100kVA and 160kVA, subject to the selected trip-unit configuration. Published technical information for this product family identifies a 4kA breaking capacity and 6.8kA making capacity.

The breaker uses an air-break arc-extinguishing system with an arc chamber designed to interrupt fault current safely. Its pole-mounted construction and weather-resistant enclosure make it suitable for outdoor low-voltage distribution installations where compact equipment and straightforward field operation are required.

The D165T is particularly suitable for utility distribution networks, rural electrification projects, transformer protection, overhead LV networks and outdoor power distribution systems . The four-pole design provides switching and protection across the complete low-voltage circuit configuration, while the manual operating mechanism supports practical field operation

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Material:
440 V440 V
Rated Current:
165 A
Number of Poles:
4 Pole
Availability:
Quantity:
Inquire Add to Basket

  • D165T

  • SASUN

  • SASUN-D165T

D165T 4-Pole Low Voltage Pole-Mounted Circuit Breaker

The D165T is a compact 4-pole low voltage pole-mounted circuit breaker developed for outdoor power distribution and transformer protection applications. Rated at 440V and 165A, it combines a digital trip unit with an air-break interruption system to provide controlled protection for low-voltage distribution circuits.

Its pole-mounted configuration is suitable for overhead distribution networks where equipment needs to be installed close to the distribution transformer. The four-pole arrangement supports practical switching and protection for low-voltage transformer connections and distribution circuits.

Digital Trip Unit for Transformer Protection

The integrated digital trip unit enables protection parameters to be configured according to the transformer application. Published D165T information identifies selectable protection for 50kVA, 100kVA and 160kVA transformer applications, helping utilities and electrical contractors match the breaker to different distribution requirements.

Digital protection provides a more application-specific approach than a basic fixed protection arrangement, particularly where transformer loading and outdoor distribution conditions need to be considered.

Reliable Air-Break Interruption

The breaker uses an air-break interruption system with an arc chamber to control and extinguish electrical arcs during fault interruption. The published D165T specification lists a 4kA short-circuit breaking capacity and 6.8kA making capacity.

This design makes the circuit breaker suitable for low-voltage outdoor distribution applications where dependable fault interruption and straightforward mechanical operation are important.

Designed for Outdoor Distribution Networks

The D165T is designed for installation on distribution poles or posts, making it suitable for overhead low-voltage networks and transformer protection applications.

Its insulated, weather-resistant enclosure helps protect the internal operating mechanism from normal outdoor environmental exposure. The published product specification identifies an IP31 protection rating.

The compact pole-mounted arrangement can help simplify equipment placement where conventional indoor switchboards are not practical.

Applications

The 4-pole LV pole-mounted circuit breaker can be used in:

  • Distribution transformer protection

  • Low-voltage overhead power networks

  • Rural electrification projects

  • Outdoor LV distribution systems

  • Utility power distribution

  • Transformer secondary-side protection

  • Pole-mounted transformer installations

  • Electrical infrastructure projects

  • Industrial and commercial outdoor distribution systems

The D165T product family is specifically documented for low-voltage overhead distribution and distribution-transformer protection applications.

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low voltage pole mounted circuit breaker 4 pole pole mounted circuit breaker D165T circuit breaker LV pole mounted breaker low voltage transformer protection breaker 440V pole mounted circuit breaker 165A pole mounted circuit breaker digital trip unit circuit breaker outdoor low voltage circuit breaker transformer protection circuit breaker

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