ABB VD4/P 12.12.25

### **Introduction to ABB VD4/P 12.12.25 Vacuum Circuit Breaker**

#### **1. Product Overview**
The VD4/P 12.12.25 is a medium-voltage vacuum circuit breaker from ABB's VD4 series, specifically designed for 12kV power distribution systems. It features vacuum interruption technology with high reliability and long service life.

#### **2. Technical Specifications**
- **Rated Voltage**: 12kV
- **Rated Current**: 1250A
- **Rated Short-Circuit Breaking Current**: 25kA
- **Mechanical Life**: 30,000 operations
- **Electrical Life**:
  - At rated current: 10,000 operations
  - At rated short-circuit current: 100 operations
- **Insulation Level**:
  - Power frequency withstand voltage: 42kV/1min
  - Impulse withstand voltage: 75kV

#### **3. Structural Features**
1. **Vacuum Interrupter**
- Utilizes ABB's patented vacuum interruption technology
- Sealed design, maintenance-free
- Low chopping current (<5A)

2. **Operating Mechanism**
- Spring-operated mechanism
- Long mechanical life
- Available with electric/manual operation

3. **Smart Functions (Optional)**
- Compatible with intelligent controllers
- Supports condition monitoring
- Enables remote communication

#### **4. Product Advantages**
✔ High breaking capacity and reliability
✔ Compact structure for easy installation
✔ Minimal maintenance requirements
✔ Eco-friendly design without SF6 gas
✔ Expandable smart functions

#### **5. Application Fields**
- 12kV power distribution systems
- Substations for industrial and mining enterprises
- Power plant auxiliary systems
- Urban power distribution networks

#### **6. Compliance Standards**
- IEC 62271-100
- GB 1984
- ANSI C37.04

#### **7. Environmental Conditions**
- Operating temperature: -25°C to +40°C
- Altitude: ≤1000m (derating required for higher altitudes)
- Protection class: IP4X (when installed in cabinets)

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