As a trusted China manufacturer, supplier, and factory, Wzonpa provides the 11KV Outdoor vacuum Load Break Switch engineered for modern overhead power distribution systems. Designed to enhance grid reliability and automation, it integrates vacuum interruption technology with intelligent fault management, making it ideal for utilities upgrading to oil-free, low-maintenance solutions.
1.Oil-Free Operation
Vacuum arc extinguishing ensures stable performance without oil-related risks
Sealed insulation structure minimizes environmental impact and aging
2.Fault Detection and Isolation
Automatically detects interphase short circuits and overcurrent faults
Instantly isolates faulty sections to reduce outage range and duration
3.Automation Integration
Compatible with FDR fault detectors and RTU remote terminals
Supports distribution automation for faster fault positioning and recovery
4.Maintenance-Free Design
Simple mechanical structure reduces failure points
Long mechanical and electrical lifespan ensures consistent operation
Overhead Distribution Networks
11KV Outdoor vacuum Load Break Switch is suitable for feeder line protection and sectionalizing
Enhances grid stability in urban and rural networks
Smart Grid Systems
Supports automated fault isolation and remote monitoring
Improves operational efficiency for power utilities
Industrial & Utility Users
Suitable for substations, power companies, and infrastructure projects
Ensures continuous power supply for critical operations
Monitors real-time current through integrated electronic controller
Triggers switch opening upon fault detection before upstream protection reacts
Locks in open state after reclosing to isolate fault permanently
Activates zero-sequence protection for single-phase grounding faults
| Item | Unit | 12KV |
| Working voltage | V | 50Hz,AC220V |
| Allowable disk deviation 20%Ripple:≤2% | ||
| Power Consumption | W | 6W |
| Potential Transformer | V,VA | 250V,0.1VA |
| Current transformer | A,VA | 1A,0.1VA |
| Zero sequence current transformer | A,VA | 1A,0.1VA |
| Output node capacity | A,V | 2A/230V DC |
| Load control | S | 60s(adjustable) |
| i.Lock locking time | MS | <600A:160ms;>600A:700ms |
| Zero sequence current setting value | A | 0.4A-2.0A |
| Zero sequence current time setting value | S | 0.6s-15s |
| Insulation resistance | MΩ | 500,DC1000v |
| Insulation voltage | V. | Power supply,power supply,closing:AC,2000V |
| Rated voltage,frequency | KV,Hz | 1,250 |
| Rated current | A | 630 |
| Rated short-time withstand current | KV | 20kA/16kA,4S |
| Rated making current | KV | 50 |
| Power frequency withstand voltage to ground/phase/fracture | KV | 42/42/49 |
| Lightning impulse withstand voltage to ground/phase/fracture | KV | 75/75/85 |
| Insulation resistance | MΩ | 2000 |
| Mechanical lifespan,electrical lifespan at rated current | Times | 100,005,000 |
| Weight | KG | 198/195 |
| SF6 gas pressure/annual leakage rate | 0 gage pressure/≤1% | |
| CT transformation ratio | 630:1 | |
| Zero sequence current CT ratio | 20:1 | |
| Zero sequence voltage phase detector ZPD | mA,DEC | 2,-180---+180 |
| Power Transformer SPS | KV/V,VA | 10.5/230,100 |
What is the main function of the 11KV Outdoor vacuum Load Break Switch?
The 11KV Outdoor vacuum Load Break Switch is used to control and protect overhead distribution lines by disconnecting load current and isolating faults, ensuring system stability and safety.
How does it improve power reliability?
By automatically isolating fault sections and allowing unaffected areas to restore power quickly, it minimizes outage impact and improves service continuity.
Is it suitable for harsh environments?
Yes, it is designed to operate under extreme temperatures, high humidity, and polluted conditions with strong insulation and durable materials.
Does it require frequent maintenance?
No, its oil-free and simplified mechanical design ensures long-term operation with minimal or no maintenance requirements.
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No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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