Ningbo Tianan (Group) Co.,Ltd.
| Altitude | ≤2000 M |
| Environment temperature | -15℃~+40℃ |
| Rated operation sequence | O-0.3s-CO-180s-CO |
| Earthquake intensity | ＜Grade 8 |
| Supply Ability | 1000 set per year |
| Rated volatge | 40.5 KV |
| Rated frequency | 50 Hz |
| Average opending speed | 1.6±0.2 M/s |
| Average closing speed | 0.7±0.2 M/s |
| Packaging Details | WOODEN CASE |
| Delivery Time | According to the fact |
| Payment Terms | T/T |
| Brand Name | TIANAN ELECTRIC |
| Model Number | VT19-40.5EP |
| Place of Origin | CHINA |
| Certification | GB |
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Product Specification
| Altitude | ≤2000 M | Environment temperature | -15℃~+40℃ |
| Rated operation sequence | O-0.3s-CO-180s-CO | Earthquake intensity | ＜Grade 8 |
| Supply Ability | 1000 set per year | Rated volatge | 40.5 KV |
| Rated frequency | 50 Hz | Average opending speed | 1.6±0.2 M/s |
| Average closing speed | 0.7±0.2 M/s | Packaging Details | WOODEN CASE |
| Delivery Time | According to the fact | Payment Terms | T/T |
| Brand Name | TIANAN ELECTRIC | Model Number | VT19-40.5EP |
| Place of Origin | CHINA | Certification | GB |
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.
| 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 |
| 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 |
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 |
| 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 |
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)
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.
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.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
1969
Total Annual:
250000000-300000000
Employee Number:
3000~3500
Ecer Certification：
Verified Supplier
Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office... Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office...
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