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D165T-D265T Numerique

D165T-D265T Numerique

Product catalog summary

Specifications
The document details the specifications for the D165T and D265T LV Pole Mounted Breakers with digital trip units. Both models have a voltage rating of 440 V, with current ratings of 165 A and 265 A, respectively. The cutout and closing power are 4,000 A for D165T and 6,400 A for D265T. Each model has four poles and different cable section requirements: 25/70 mm² for D165T and 50/150 mm² for D265T. The breakdown voltage is consistent across both models, with pulse/earth at 20 kV, 50 Hz at 10 kV, and between poles at 4 kV. The control system is manual, and installation is on a post.

Technical Characteristics
The document provides part numbers for complete units and components, including digital units and metal cases. The digital trip unit is designed to protect transformers with ratings of 50 kVA, 100 kVA, and 160 kVA. It uses a micro-controller to assess transformer temperature in real-time, factoring in phase currents and ambient temperature.

Procedures and Performance
The circuit breaker units are designed to cut off in air with metal partition chambers to break the arc. When open, they connect the transformer neutral to the station structural earth. When closed, a spark gap limits the potential rise of the LV neutral. The digital trip unit adjusts for different transformer ratings and computes ambient temperature using a probe and mathematical model.

Performance Data
The document includes detailed tables showing trip times under various conditions, such as balanced and unbalanced overloads at different temperatures (+20°C, -25°C, +50°C). These tables provide trip times for different initial loads and current phases, ensuring selectivity with TPC fuses.

Recommendations
For optimal performance, the document suggests ensuring compatibility with significant load differences in rural environments, allowing full exploitation of installed power even in unbalanced operations.

Catalog excerpts

Saves Your Energy LV Pole Mounted breaker / digital trip unit

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Non-contractual document - Manual N° 2005985B LV Pole Mounted breaker / digital trip unit The protection and management of MV/LV transformers in a rural environment requires specific circuit breakers compatible with significant load differences, thus ensuring full exploitation of the installed power, even in unbalanced operation. Technical characteristics 1- Post circuit breaker with digital trip unit Reference strandard Voltage rating Current rating Cutout and closing power Number of poles Number of outputs Cable sections Breakdown voltage • pulse/earth • at 50 Hz • between poles Control system...

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