ZW20-12 Outdoor Vacuum Circuit Interrupter
✅Enhanced Power Supply Reliability
✅Enables Distribution Automation
✅Operational Flexibility
✅Ease of Maintenance
- Product Introduction
Products Feature
- 🛡️ Robust Protection & Reliability: Specifically designed for 10kV and 35kV distribution lines, it provides superior protection against short circuits and overloads. The vacuum灭弧 chamber ensures a long electrical life and prevents fire hazards.
- 🤖 Smart Distribution Automation: When paired with an FTU, the ZW20-12 transforms into an intelligent switch. It can automatically identify fault sections, isolate them, and restore power to healthy segments, significantly improving grid reliability.
- 🌍 Extreme Environmental Tolerance: Built for harsh outdoor conditions. With an operating temperature range of -50°C to +70°C and an IP65-rated enclosure, it withstands heavy winds, thick ice (up to 10mm), and severe pollution without degradation.
Core Functions & Value Proposition
- 🎯 Precision Switching & Control
Provides reliable, arc-free making and breaking operations for distribution lines. It ensures safe and precise control of medium-voltage overhead networks under normal load conditions. - 🛡️ Rapid Fault Protection (Core Value)
Equipped with advanced overcurrent and short-circuit detection, the breaker trips instantly upon fault occurrence. This rapid response effectively prevents fault propagation, safeguarding the rest of the grid infrastructure from catastrophic damage. - 🤖 Smart Distribution Automation
Designed for modern smart grids, the ZW20-12 seamlessly integrates with FTUs (Feeder Terminal Units). It enables automatic fault location, isolation, and service restoration (FLISR) for healthy segments, significantly reducing customer outage duration and improving grid reliability.
Technical Parameters
Table 1: General Technical Specifications
| Technical Parameter | Value / Unit |
|---|---|
| Rated Voltage | 12 kV |
| Rated Frequency | 50 Hz |
| Rated Current | 630 A |
| Rated Short-Time Withstand Current | 20 kA |
| Duration of Short-Circuit Current | 4 s |
| Rated Peak Withstand Current | 50 kA |
| Rated Short-Circuit Breaking Current | 20 kA |
| Rated Short-Circuit Making Current | 50 kA |
| Short-Circuit Breaking Times | 30 times |
| Mechanical Life | 10,000 operations |
Table 2: Dielectric Strength & Insulation Levels (Critical)
| Insulation Type | Phase-to-Phase & Ground | Across Break (Open Contact) |
|---|---|---|
| Power Freq. Withstand (1min) | 42 kV | 48 kV |
| Lightning Impulse Withstand | 75 kV | 85 kV |
Table 3: Quality Assurance
| Parameter | Value |
|---|---|
| Partial Discharge | < 20 pC |
Operating Conditions
- Ambient Temperature: -50°C to +70°C (Max. daily temperature variation: ≤ 25K)
- Solar Radiation: ≤ 1000 W/m²
- Altitude: ≤ 1000m (Note: For altitudes above 1000m, insulation levels must be derated according to IEC standards)
- Wind Speed: ≤ 34 m/s
- Ice Thickness: ≤ 10mm
- Seismic Withstand Level: Up to 8 degrees
- Pollution Level: Class E (Heavy pollution resistance)
- Installation Environment: Free from flammable/explosive hazards, severe chemical corrosion, and violent vibrations.
FAQ
Q1: Can the ZW20-12 be integrated into existing Distribution Automation systems?
A: Yes. The ZW20-12 is fully compatible with standard FTUs (Feeder Terminal Units). It can be equipped with built-in or external current transformers (CTs) and zero-sequence CTs to provide accurate data for fault location, isolation, and service restoration (FLISR), making it ideal for smart grid upgrades.
Q2: Is this breaker suitable for high-altitude regions?
A: The standard ZW20-12 is designed for altitudes up to 1000m. However, for projects in high-altitude areas (e.g., up to 2000m or more), we offer customized solutions with derated insulation levels and enhanced dielectric strength to ensure safe and reliable operation in low-air-density environments.
Q3: How does the vacuum interrupter technology benefit long-term maintenance?
A: The vacuum interrupter chamber is completely sealed and immune to environmental factors like moisture, dust, and pollution. Combined with the SF6 gas-insulated main body, it prevents internal oxidation and contact degradation, offering a mechanical life of up to 10,000 operations and virtually eliminating the need for routine maintenance.
Q4: What protection functions does the ZW20-12 provide?
A: It provides comprehensive protection against short circuits, overcurrents, and single-phase grounding faults. When paired with a smart controller, it can automatically distinguish between internal and external faults, isolating only the faulty section to prevent widespread blackouts.
Q5: Can the ZW20-12 operate in extreme weather conditions?
A: Absolutely. It is engineered for harsh environments, featuring an operating temperature range of -50°C to +70°C, resistance to 34m/s winds, and an ice thickness tolerance of up to 10mm. This makes it highly reliable in both freezing winters and scorching summers.
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