440V LV Circuit Breakers for Protection of Pole Mounted Distribution Transformers
| Brand | Vziman |
| Model NO. | 440V LV Circuit Breakers for Protection of Pole Mounted Distribution Transformers |
| Rated voltage | 440V |
| Rated normal current | 165A |
| Rated frequency | 50Hz |
| Series | DHP |
440V LV Circuit Breakers Pole Block Digital Trigger
Protection and management of HTA/BT transformers in rural areas involves the use of specific circuit breakers adapted to large load imbalances, thus ensuring full utilization of the installed power even in the presence of imbalances.
Box-Type Circuit Breakers
These devices (four poles, three of which are protected) are air-break devices with metal separators for arc interruption. The opener, a contactor, establishes an electrical connection between the transformer's neutral conductor and the substation's ground.The closeer, a separator, limits the potential rise of the neutral BT conductor relative to the ground to greater than 10 kV.The 440V LV circuit breaker is housed in a weather-resistant, glass-fiber-reinforced polyester housing.
440V LV Circuit Breakers Digital Trigger Block
The digital trigger block provides protection for three transformer sizes (50 kVA, 100 kVA, and 160 kVA) on the pole, whether conventional transformers (without internal protection) or new transformers with protection (TPC). A selector allows selection of the transformer's protection rating. A microcontroller assesses the transformer's assumed temperature in real time based on the currents on all three phases and the ambient temperature. The latter is calculated as a function of the three-phase current using the probes and a mathematical model.
If the trigger block is integrated in an older generator-type circuit breaker, the load integration function (if present) will be disabled.
| Model NO. | DHP |
| Arc-extinguishing Medium | Vacuum |
| Poles Number | 4 |
| Single Package Size | 80X80X60cm |
| Rated Voltage | 440V |
| Rated Current | 165A |
| Frequency | 50Hz |
| Specification | 100*100*100 |
| Installation | Fixed |
| Segmentation Capability | 20kA, 10kA, 4kA |
440V LV Circuit Breakers Product Picture
LV Circuit Breakers are mainly used for the protection and management of HTA/BT transformers in rural areas, adapted to large load imbalances to ensure full utilization of installed power even when imbalances exist.
Q: Which transformer sizes can the digital trigger block of LV Circuit Breakers protect?
A: The digital trigger block of LV Circuit Breakers can protect three transformer sizes (50 kVA, 100 kVA, and 160 kVA) on the pole, both conventional transformers (without internal protection) and new TPC-protected transformers.
Q: What happens if the digital trigger block is integrated in an older generator-type LV Circuit Breaker?
A: If integrated in an older generator-type LV Circuit Breaker, the load integration function (if present) of the trigger block will be disabled.
