• 40.5kV HV Vacuum SF6 circuit breaker
40.5kV HV Vacuum SF6 circuit breaker
discuss personally
Model
ZW39-40.5/2500-31.5
ZW39-40.5/2000-31.5
Basic info
Brand Wone
Model NO. 40.5kV HV Vacuum SF6 circuit breaker
Rated voltage 40.5kV
Rated normal current 2500A
Rated frequency 50Hz
Rated short circuit breaking current 31.5kA
Series ZW39-40.5
Product Detail

Product introduction:

ZW39-40.5 vacuum circuit breaker is applicable in the 50Hz,40,5kV three-0hase electrical system and it is used forbreaking rated current, failure current or switching lines and realize the control and protection of electrical system,This product can be frequently operated and can also be used as a connection breaker.

Main characteristic:

  • The optimized choice of vacuum interrupter contact materials keeps the breaking interception value under 4A on average, effectively inhibiting operation overvoltage.

  •  The circuit breaker has strong breaking capacity and the breaking short-circuit current 31.5kV can reach 30 times.

  •  Equipped with CT34 improved spring operating mechanism, using cast aluminum base, good stability, mechanical life of more than 10000 times. Main features of CT34 improved structure (compared with original CT10A structure).

    (a)The energy storage system adopts floating tooth structure. After closing, the remaining energy of the closing spring will continue to store energy and act as the closing buffer. There is no void, the energy storage time is short, and the energy storage can be in place within 8S;

    (b)Operating mechanism adopts high strength cast aluminum frame, which has high strength, no welding stress and nigh anti-corrosion performance;

    (c)The opening and closing spring and buffer are arranged in a centralized way, with compact structure and beautiful appearance;

    (d)Imported Krupp NB52 grease is used for the mechanism, which is resistant to low temperature and not easy to harden, and is suitable for -50℃~+55°℃ area;

    (e)The mechanism adopts oil buffer, small operation impact, small brake rebound.

  •  This product can meet the environment requirements for a sea level of up to 3000m; with a high insulation level, the insulation level at broken sections reaches 118kV;

  • The circuit breaker may have internally or externally attached transformers. Four internally attached transformers can be attached to each phase of the circuit beaker and the iron core of the internally attached transformer adopts microcrystal alloy and magnetic material with high conductivity, and the electrical transformers above 200A can reach Grade 0.2 or Grade0.2S. The integrated structure of the circuit breaker is compact, and the binding techniques for the secondary windings of transformers have been fully optimized, which fully ensures that after binding the coils of the transformer has regular shape, free of burrs, and they will not become loosen at baking and not deformed after they are installed into the main unit, thus ensuring even electrical field.

  •  The internally attached CT of the circuit breaker is compact, but due to the limited space inside the circuit breaker, it cannot realize very high accuracies (for example 0.2 or 0.2s. ) at small currents (such as those below 100A), and it also has small load. ln addition, the maintenance, capacity increase and replacement of internally attached current transformer is not convenient compared with those of the externally attached transformer.

  •  In the space between the vacuum interrupter and the ceramic sleeve of this product is filled with SF6 gas (without internally attached CT: 0.02MPa, with internally attached CT: 0.2pa), ensuring that no internal condensation and moisture absorption will occur,

  •  Imported products or products made by joint venture manufacturers were adopted for major secondary electric components, so they feature high reliability.

  • The surface treatments for the exposed parts of this product were al hot dip galvanized or directly use high quality stainless steel plates, which feature excellent corrosion resistance.

Main technical parameters:

1732503263140.png

Order notice :

  • Types and specifications of circuit breakers;

  • Rated electrical parameters (voltage, current and breaking current, etc.);

  • Ambient conditions (ambient temperatures, sea levels and grades of environmental pollution level);

  • Operating voltage and motor voltage of operating mechanism;

  • Number, current ratios, scale order combination and secondary load of internally or externally attached transformer;

  •  Spare parts and specialized tools, names and quantity of equipment (need to be ordered separately).

How does a vacuum SF6 circuit breaker work?

Closing Process:

  • Closing Process: When the operating mechanism receives a closing command, it drives the moving contact towards the stationary contact until they make contact and close tightly, thus completing the circuit. During the closing process, the contact pressure between the contacts must reach a certain value to ensure good electrical conductivity and mechanical stability, preventing issues such as overheating and loosening of the contacts during operation.

Opening Process:

  • Opening Process: During the opening process, the operating mechanism rapidly moves the moving contact away from the stationary contact, creating an arc between the contacts. At this point, the insulating medium in the arc quenching chamber (such as sulfur hexafluoride gas) rapidly decomposes and ionizes under the high temperature of the arc, forming a plasma. The positive and negative ions in the plasma move in opposite directions under the influence of the electric field, causing the arc to cool and stretch, ultimately leading to its extinction and the disconnection of the circuit.


Know your supplier
Wone
Main Categories
High voltage/Low voltage/Wire cable/Instrument meters/New energy/Tester/Production equipment/Generator/Electrical fittings/Integrated Electrical Equipment
Business Type
Design/Manufacture/Sales
Highest Annual Export (USD)
$50,000,000
Professional Experience
1 years
Workplace
65666m²m²
占位
占位
Related Products
Related Knowledges
Analysis of Gas Concentration in High - Voltage Reactors of Large - Scale Hydroelectric Generator Sets
Analysis of Gas Concentration in High - Voltage Reactors of Large - Scale Hydroelectric Generator Sets
1.Gas Generation and Analysis Principle of High - Voltage ReactorsHigh - voltage reactors use oil and insulating paper for insulation. Normal operation may see local overheating or discharges (e.g., iron core/winding issues, inter - turn short circuits), causing insulation cracking and producing gases like hydrocarbons (methane, etc.), CO, CO2, H2). These gases reflect internal insulation status, enabling real - time monitoring.For closed oil - filled reactors, insulation aging and oil oxidation
Oliver Watts
07/11/2025
How to avoid step voltage?
How to avoid step voltage?
Hey everyone, I'm Blue — an electrical engineer with over 20 years of experience. My work has mainly focused on circuit breaker design, transformer management, and delivering power system solutions for various utility companies.Today, someone asked a great question: "How to avoid step voltage?" Let me explain this in simple but professional terms.First off, what exactly is step voltage (or touch potential between your feet)?Imagine this: when a high-voltage line falls to the ground or there's a
Master Electrician
07/11/2025
How many steps are in a voltage regulator?
How many steps are in a voltage regulator?
Hey everyone, I'm Blue — an electrical engineer with over 20 years of experience. My career has mostly focused on circuit breaker design, transformer management, and providing power system solutions for various utility companies.Today, someone asked a great question: "How many steps are in a voltage regulator?" Let me break it down in simple but professional terms.Well, the short answer is: It depends! Just like asking how many gears a car has — the answer really depends on the model and its int
Master Electrician
07/11/2025
What is a step voltage regulator?
What is a step voltage regulator?
Hey everyone, I'm Blue — an electrical engineer with over 20 years of experience, currently working at ABB. My career has mainly focused on circuit breaker design, transformer management, and providing power system solutions for various utility companies.Today, someone asked the question: "What is a step voltage regulator?" Let me explain it in simple but professional terms.So, a step voltage regulator is basically a device used in power distribution systems to keep the voltage stable. Think of
Master Electrician
07/11/2025
What to Pay Attention to When Replacing Siemens Outdoor Voltage Transformers with ABB Ones?
What to Pay Attention to When Replacing Siemens Outdoor Voltage Transformers with ABB Ones?
Hey everyone, I’m James, and I’ve been working with outdoor voltage transformers (VTs) for 10 years.From the early days of tagging along with my mentor on job sites, wiring up equipment, and debugging systems, to now leading substation projects and dealing with all kinds of complex field issues — I’ve seen it all. I’ve made mistakes, learned from them, and picked up some real-world experience along the way.Not long ago, a colleague messaged me:“Echo, we’
James
07/11/2025
What are the future development trends of 35kV outdoor voltage transformers?
What are the future development trends of 35kV outdoor voltage transformers?
Hey everyone, I’m Echo, a 10-year veteran in the field of outdoor voltage transformers (VTs). Today, let’s talk about where the 35kV outdoor voltage transformer is heading in the future.1. Digitalization and Smart FeaturesWith the rise of IoT (Internet of Things), big data, and cloud computing, 35kV outdoor VTs are getting smarter.Imagine a voltage transformer that can monitor its own condition in real time, send data remotely, and even be controlled from your phone or computer. This
Echo
07/11/2025
×
Inquiry
Download
Experts Electrical is dedicated to serving the personnel in the global power industry.
Join Experts Electrical, not only can you discover power equipment and power knowledge, but also canhnd like - minded friends!