VD4/P 12.25.40 is ABB indoor type medium‑voltage vacuum circuit‑breaker of VD4/P series. It adopts vacuum interrupter as arc‑extinguishing medium, designed for 12kV power distribution systems. Rated operating current reaches 2500A with 40kA short‑circuit breaking capability. This draw‑out type circuit‑breaker is intended for installation inside medium‑voltage switchgear cabinets, suitable for frequent switching operations. It delivers high mechanical and electrical service life, low maintenance requirements. It can be equipped with spring operating mechanism, supporting manual and electrical closing & tripping functions. Widely applied for protection and control of transformers, generators, motors and bus‑bars in power plants, industrial plants and utility substations.
| Item | Specification |
|---|---|
| Part Number | VD4/P 12.25.40 |
| Product Family | VD4/P Vacuum Circuit‑Breaker |
| Type | Indoor Draw‑out Vacuum Circuit‑Breaker |
| Rated Voltage (Ur) | 12 kV |
| Rated Current (Ir) | 2500 A |
| Rated Short‑circuit Breaking Current (Isc) | 40 kA |
| Rated Short‑time Withstand Current (Ik) | 40 kA / 3 s |
| Rated Peak Withstand Current (Ip) | 100 kA |
| Rated Frequency | 50 Hz / 60 Hz |
| Operating Mechanism | Spring mechanism |
| Installation Style | Draw‑out, for indoor switchgear cubicle |
| Arc Extinguishing Technology | Vacuum interrupter |
| Mechanical Endurance | 10000 operations |
| Electrical Endurance (at rated breaking current) | 50 operations |
| Insulation Level | 12/28/75 kV |
| Auxiliary Contacts | Standard configurable auxiliary contact blocks |
| Protection Degree | IP20 (inside cabinet) |
| Operating Temperature | -5 ℃ ~ +40 ℃ |
| Storage Temperature | -25 ℃ ~ +70 ℃ |
| Relative Humidity | Max 95 %, non‑condensing |
| Standard Compliance | IEC 62271‑100, GB 1984 |
| Net Weight | Approx. 135 kg |
| Mounting | Fit for compatible 12kV MV switchgear cabinet |
| Application Object | Transformer, motor, generator, busbar protection |
