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General| Type | VD4 |
|---|---|
| Rated Voltage | 12 kV |
| Rated Current | 1250 A |
| Breaking Capacity | 25 kA |
| Rated Short-Circuit Breaking Current | 25 kA |
| Number of Poles | 3 |
| Insulation Medium | Vacuum |
| Rated Frequency | 50/60 Hz |
| Standards | IEC 62271-100 |
| Electrical Life | 10, 000 operations at rated current |
| Operating Mechanism | Spring mechanism |
| Rated Short-Time Withstand Current | 25 kA for 3 seconds |
Presents key electrical and performance specifications for VD4 circuit-breakers.
Details the stored-energy spring operating mechanism and its components.
Highlights safety precautions and requirements for operating personnel.
Lists essential checks and actions before commissioning the circuit-breaker.
Outlines procedures for inspecting and testing switching devices, mechanisms, and poles.
Details servicing for switching devices, mechanisms, and breaker poles.
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