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VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection
VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection
VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection
VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection
Specifications
Earthquake intensity :
＜Grade 8
Altitude :
≤2000 M
Environment temperature :
-15℃~+40℃
Rated operation sequence :
O-0.3s-CO-180s-CO
Average opending speed :
1.6±0.2 M/s
Supply Ability :
1000 set per year
Rated volatge :
40.5 KV
Rated frequency :
50 Hz
Brand Name :
TIANAN ELECTRIC
Model Number :
VT19-40.5EP
Place of Origin :
CHINA
Certification :
GB
MOQ :
1 SETS
Price :
To be pending
Packaging Details :
WOODEN CASE
Delivery Time :
According to the fact
Payment Terms :
T/T
Average closing speed :
0.7±0.2 M/s
Description

VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection

Product Overview

The VT19-40.5EP High Voltage Vacuum Circuit Breaker, manufactured by TIANAN, is a high-performance indoor power distribution protection device designed for 40.5kV and 12kV electrical systems. Utilizing advanced vacuum interruption technology, this circuit breaker delivers reliable, low-maintenance protection for medium voltage networks requiring precise overcurrent and short-circuit protection.

Engineered for 50Hz AC systems, the VT19-40.5EP is widely deployed in power plants, industrial facilities, utility substations, renewable energy projects (wind farms and solar plants), and commercial buildings. Its vacuum interrupter design ensures arc extinction within milliseconds, significantly reducing contact wear and extending service life.

Compliant with GB standards, this high voltage circuit breaker offers customizable configurations to meet diverse project requirements.

Key Features



Feature Benefit
Vacuum interruption technology Superior arc quenching, minimal contact wear, long service life
Rated voltage: 40.5kV / 12kV Flexible for primary and secondary distribution networks
Opening speed: 1.6±0.2 m/s Rapid fault clearing, minimized arc energy
Closing speed: 0.7±0.2 m/s Smooth and reliable closing operation
Lightning impulse withstand: 185kV Excellent protection against surges and lightning strikes
Seismic resistance: < Grade 8 Suitable for earthquake-prone regions
Over-travel: 6±1 mm Precise contact force, reduced welding risk
Contact clearance: 18±1 mm Reliable interruption performance
Bounce time: ≤3 ms Minimized arcing and contact damage
Operation sequence: O-0.3s-CO-180s-CO Proper coordination for fault clearing and reclosing
Temperature range: -15℃ ~ +40℃ Reliable in diverse climate conditions
Altitude: ≤2000m Suitable for high-altitude installations

Technical Specifications



Parameter Value
Product Name High Voltage Vacuum Circuit Breaker
Brand TIANAN
Model VT19-40.5EP
Rated Voltage 40.5 kV
Rated Frequency 50 Hz
Rated Lightning Impulse Withstand Voltage 185 kV
Average Opening Speed 1.6±0.2 m/s
Average Closing Speed 0.7±0.2 m/s
Over-travel 6±1 mm
Clearance between Open Contacts 18±1 mm
Closing Contact Bounce Time ≤ 3 ms
Rated Operation Sequence O-0.3s-CO-180s-CO
Ambient Temperature -15℃ ~ +40℃
Altitude ≤ 2000 m
Earthquake Intensity Resistance < Grade 8
Certification GB
Place of Origin China

Applications

The VT19-40.5EP is ideally suited for:



Sector Application
Power Generation Circuit protection in thermal, hydro, and gas power plants
Utility Distribution Substation feeder and transformer protection
Industrial Manufacturing Protection for large motors, transformers, and production lines
Renewable Energy Switchgear protection in wind farms and solar PV plants
Commercial Infrastructure Protection for high-rise buildings, hospitals, and data centers
Mining & Heavy Industry Robust protection for heavy electrical loads in harsh environments

Customization Services



Item Details
Brand TIANAN
Model VT19-40.5EP
Origin China
Certification GB standard
MOQ 5 sets
Packaging Wooden pallet
Delivery Subject to production schedule
Payment To be negotiated

Technical Support & Services

  • Installation guidance and commissioning support

  • Troubleshooting and fault diagnosis

  • Preventive maintenance programs

  • Genuine spare parts and component replacement

  • Operator and maintenance training

  • Remote monitoring and diagnostics (upon request)

Packaging & Shipping

Each VT19-40.5EP is carefully packaged in protective foam and secured in a sturdy wooden pallet or cardboard box to prevent transit damage. Real-time tracking is available via provided tracking number through trusted international logistics partners.

Q&A

Q1: What is the rated voltage of the VT19-40.5EP?
A: Rated at 40.5kV, also suitable for 12kV applications.

Q2: What interruption technology does it use?
A: Vacuum interruption – superior arc quenching with minimal contact wear.

Q3: What is the ambient temperature range?
A: -15℃ to +40℃.

Q4: Is it suitable for seismic regions?
A: Yes, designed to withstand earthquakes below Grade 8.

Q5: What is the minimum order quantity?
A: 5 sets.

Q6: Does TIANAN provide installation support?
A: Yes, full installation guidance and commissioning support are available.

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VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection

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Product Detail
Earthquake intensity :
＜Grade 8
Altitude :
≤2000 M
Environment temperature :
-15℃~+40℃
Rated operation sequence :
O-0.3s-CO-180s-CO
Average opending speed :
1.6±0.2 M/s
Supply Ability :
1000 set per year
Contact Supplier
VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection
VT19-40.5EP High Voltage Vacuum Circuit Breaker – 40.5kV Indoor Power Distribution Protection

Ningbo Tianan (Group) Co.,Ltd.

Verified Supplier
10 Years
zhejiang, ningbo
Since 1969
Business Type :
Manufacturer, Exporter, Trading Company, Seller
Main Products :
Compact Transformer Substation, Mobile Transformer Substation, Cast Resin Dry Type Transformer
Total Annual :
250000000-300000000
Employee Number :
3000~3500
Certification Level :
Verified Supplier
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