What Is an Outdoor Vacuum Circuit Breaker? Key Features and Applications

Outdoor vacuum circuit breakers are crucial when considering the protection of high-voltage systems. No doubt that these breakers are unmatched in safety, toughness, and reliability. Whether you are overseeing power grids or intricate industrial systems, the right circuit breaker can be transformative in the efficiency of your systems. Read more to learn why these devices are fundamental and their features, benefits, applications, and more. So, stay connected!

1) What is an Outdoor vacuum circuit breaker?

An outdoor circuit breaker is equipment that interrupts the flow of electric current in high-voltage electricity lines. It is mounted outside and functions well under different climatic conditions. It also protects power systems from damages incurred from faults such as short circuits, overloads, and more.

This is done by means of a vacuum, which is used to interrupt the electrical contact. The two contacts within the breaker also open and close. When they open, the arc within this process is rapidly extinguished in the vacuum. This makes the device reliable and safe.

These outdoor vacuum circuit breakers are found in places like power stations, substations, and industrial regions. Yes! They are designed for high voltage applications like 11kV or 33kV and higher. Their rugged construction enables them to function in rain, wind, dust, and even extreme cold or heat.

Moreover, these breakers assist in ensuring system stability for the power supply. In case of a system fault, the breaker isolates the supply without delay. This helps in reducing damage to healthy parts of the system and ensures that people are safe.

2) Key Features of Outdoor Vacuum Circuit Breakers

Outdoor vacuum circuit breakers possess a number of significant advantages that make them a rational choice for power systems. They are designed to target high voltages and can function optimally in outdoor conditions.

i) Widespread Arc Extinguishing Equipment

These breakers employ a vacuum to cease the flow of electric current. The vacuum placed between the contacts extinguishes the arc within the breaker instantaneously every time the contact opens. This allows for swifter and safer braking, shielding the brake from excessive damage and internal heating.

ii) High Voltage Capacity

They are capable of withstanding very high voltages. In fact, they can also withstand voltages above 33kV. Therefore, they can be used in electric power plants and in heavy industries. Depending on a certain system design, some models can accommodate significantly higher ratings.

iii) Weather Resistance

The outer body is well-built and it is strong and sealed. It can withstand rain, dust, wind, and snow. This guarantees their smooth operation in all kinds of weather. In addition, the materials used are rust and aging-resistant.

iv) Long Life

These types of breakers can perform their task for a long time. The vacuum interrupter inside does not wear out quickly. This leads to fewer replacements and worrying about sudden failures. In general, they have a lifecycle of over 20 years if used under normal conditions.

v) Low Maintenance

These types of breakers have fewer moving parts and a simple design. That way, they do not require regular checks or repairs.

vi) Compact Design

These types of breakers require less space compared to other types of breakers. This facilitates easier installation in numerous outdoor locations. Their light weight also makes handling easier.

vii) Fast Operation

Under a fault condition, these breakers operate very quickly because they cut off the current in milliseconds. This prevents damaging the system. Moreover, this also provides greater safety to people and equipment because of the increased speed.

viii) Reliable Performance

They are tested to some safety and quality benchmarks. Their reliable performance makes them a popular component in outdoor power systems. They function properly, even when they are heavily loaded or subjected to extreme weather.

These features make outdoor vacuum circuit breakers a prime selection for high-voltage requirements.

3) Applications of Outdoor Vacuum Circuit Breakers

Circuit breakers outside find application in many places that require solid and reliable control over electric power. They serve to electronically control high-voltage systems situated in open areas.

• Power Stations

These breakers are used frequently in power generation plants. They control the level of current that flows through the system and protect the system from any faults that may occur. They ensure that the power supply system is stable throughout the duration of its use. Their response is very fast in order not to waste expensive generators or other vital components.

• Substations

In substations, outdoor vacuum circuit breakers are widely utilized. They are useful for connecting or disconnecting parts of the grid whenever there is a need. If there is any distraction, these breakers will quickly shut off power to avoid damage. They are also employed during system upgrades and repairs.

• Industrial Areas

A constant and reliable supply of power is necessary for large factories and plants. These types of breakers are utilized to safeguard the machines and control systems. They help minimize downtime and ensure that operations run. These devices are usually situated alongside heavy machinery to uphold safety.

• Transmission Lines

These types of breakers are situated along the power transmission lines. They control the electricity flow over vast distances. If there is any issue along the block, they will isolate the problem without shutting down the system. This feature enables faster restoration of services.

• Renewable Energy Systems

These types of breakers are used to connect wind and solar farms to the grid. They guard the system against overloads and faults from sudden changes in weather or output. They can also be used during maintenance to eliminate the source.

• Remote Areas

Outdoor breakers serve their purpose best in rural or remote areas as they are extremely reliable and need very little upkeep. This makes them ideal for places that do not allow for regular maintenance checks. Their design allows for longevity with little servicing.

These types of breakers are used in modern power systems because of their unparalleled strength, speed, and safety.

4) Advantages of Using Outdoor Vacuum Circuit Breakers

Outdoor vacuum circuit breakers are a preferred option in high-voltage systems due to the many benefits they provide. They perform well in various conditions while maintaining safety, reliability, and efficiency.

+ High Safety: The safety of people and equipment is ensured because of the use of Outdoor vacuum circuit breakers. With the use of the vacuum interruption method, electrical currents are stopped quickly, so the chances of fires or explosions are very low.

+ Low Maintenance: Due to the simplistic design of these breakers, very little maintenance is required. This absence of complexity means repairs or checks can be performed with ease, which aids in reducing long-term costs and downtime.

+ Long Service Life: These breakers can last for more than two decades without requiring replacements. Their endurance is unrivalled due to the non-excessive wearing of the vacuum interrupter. Unlike other outdoor types of breakers, these are a smarter investment, considering prolonged lasting periods.

+ Fast Operation: Their protection of components from damage is a very important factor that depends on the speed of interruption. The quick response time of vacuum breakers is fundamental.

+ Compact Design: Outdoor vacuum circuit breakers possess a compact size, which provides an exceptional advantage with installation in tight locations. In addition, they are lighter as compared to other types of breakers, saving in transportation and handling expenses.

+ Environmental Protection: Modern circuit breakers that run on oil and gas are harmful to the environment. Unlike them, outdoor vacuum breakers do not emit toxic substances, are free from the dangers of extreme rain, snow, and high winds, and are therefore considered eco-friendly.

+ Cost-Effective: These outdoor vacuum circuit breakers aid in achieving good savings due to minimal repairs, replacements, and maintenance expenses required throughout their service life. Their longevity makes them a financially friendly investment.

Outdoor vacuum circuit breakers are incredibly safe, efficient, and inexpensive for high-voltage applications.

5) How to Choose the Right Outdoor Vacuum Circuit Breaker

It is crucial to select the right outdoor vacuum circuit breaker for the effectiveness and safety of your power system. Keep these factors in mind when making your selection.

• Voltage Rating: The foremost factor to analyze is the voltage rating. Determine the level of voltage your circuit breaker system will encounter. Vacuum circuit breakers vary in voltage levels from 11kV to 33kV and beyond. Select a breaker that corresponds with your equipment voltage.

• Current Interrupting Capacity: Analyze the current interrupting capacity as this indicates the limit of current the breaker can safely interrupt. This is essential for system protection against excessively high current levels on faults. Select a vacuum breaker that has a current capacity that is greater than what the system is expected to experience.

• Environmental Condition: Examine the geographical weather conditions and relationships, as any factor within them will highly impact the capacity and usefulness of the breaker.

You know, some outdoor vacuum circuit breakers are made to withstand harsh temperatures, rain, dust, and winds. The product chosen must perform adequately under these harsh settings.

• Size and Installation: Assess the weight and dimensions of the breaker. The breaker should be able to fit within the available space for installation. A compact design can minimize space and enhance ease of installation.

Also, consider if the breaker will need to be moved and installed in different locations frequently.

• Maintenance Requirements: Select a breaker that meets your maintenance requirements. Some breakers are more maintenance-friendly than others, with some needing regular maintenance checks or repairs. Think of the amount of time and resources you are willing to spend on maintenance.

• Cost: Cost is always an aspect to consider. For reliable breakers, ensure you choose one that is budget-friendly. Don’t forget to compare market prices and consider the savings associated with increased service life and reduced repair expenses.

While these considerations may seem numerous, planning with them allows for ensuring the appropriate Outdoor Vacuum Circuit breaker that may align with your preference and needs.

6) Indoor vs Outdoor Vacuum Circuit Breaker

Unlike other components of vacuum circuit breakers that aid in serving power systems, indoor and outdoor vacuum circuit breakers focus on regions of application. Allow us to take you through a light comparison of both for a better understanding.

a) Location

Indoor vacuum circuit breakers find application within buildings, control rooms, or substations. Such equipment is meant for protected spaces. Breakers that are intended to be used in the open and are exposed to the weather and harsh conditions are said to be outdoor breakers.

b) Weather Resistance

Outdoor vacuum circuit breakers are capable of withstanding extreme rains, snow, and high winds. These breakers are weatherproof and sealed off so that no internal components are exposed. Indoor circuit breakers do not need to be weatherproof as they are kept in a dry-controlled enclosure.

c) Size and Design

Indoor breakers are relatively smaller and more compact in size as they do not have to bear external stresses. Outdoor breakers are larger in size and constructed of tougher materials to withstand outdoor elements.

d) Maintenance

Outdoor breakers tend to have less cleaning and environmental damage maintenance. Indoor breakers, on the other hand, need more frequent checking due to the controlled environment and the presence of dust and other particulates.

d) Cost

Outdoor vacuum breakers are more costly because they are built to withstand harsher conditions while indoor vacuum circuit breakers have a simpler structure, which makes them significantly less expensive.

Here is a brief table that summarizes the main distinctions:

Feature	Indoor Vacuum Circuit Breaker	Outdoor Vacuum Circuit Breaker
Location	Indoor use	Outdoor use
Weather Resistance	Not weatherproof	Built to withstand weather
Size	Smaller and compact	Larger and rugged
Maintenance	More frequent checks	Less frequent checks
Cost	Generally lower	Generally higher

7) Delixi Outdoor Vacuum Circuit Breaker

Delixi offers advanced outdoor vacuum circuit breakers for high-voltage use that provide adequate protection for power systems. They are built for tough conditions, working great outdoors. Delixi has models like LW8-33kV, ZW7-33kV, and LW36-126kV, which are all made for different operational needs and have specific features.

i) LW8-33kV Outdoor High Voltage Circuit Breaker SF6

The LW8-33kV breaker is fitted for high-voltage power systems. It is also equipped with SF6 gas for arc and insulation purposes, meaning it will perform well in strenuous conditions. This is 33kV rated and has a short-circuit breaking current of 31.5kA, meaning it will protect against power surges effectively. It has a mechanical life of more than 3000 operations, which is very good, making it low maintenance.

ii) ZW7-33 Outdoor HV Vacuum 33kV Circuit Breaker

The ZW7-33 circuit breaker comes with vacuum interrupters that are capable of superior arc quenching. The vacuum interruption device mounted on the circuit breaker has a rated voltage of 33 kV and a rated current of 630 A. Moreover, it can control a short-circuit breaking current of 31.5 kA. Minimal maintenance is required due to its vacuum technology, and its strong construction helps in different environmental conditions.

iii) LW36-126kV Outdoor HV SF6 Circuit Breaker

Recommended for even higher electrical loads, the LW36-126kV breaker is a high-voltage SF6 type. It has a rated voltage of 126 kV and offers a short-circuit breaking current of up to 50 kA. Such parameters deliver exceptional performance in large power systems. Endurance to severe weather and harsh conditions is provided by its rugged design, along with a long service life of 3,000 operating cycles.

These are the most robust and low-maintenance outdoor vacuum circuit breakers that Delixi manufactures, ideal for industry-specific high-voltage applications; hence, they ensure safety and reliability.

8) Conclusion

So, understanding the importance of outdoor vacuum circuit breakers highlights the need for reliability and safety in high-voltage electrical systems. The Breakers’ Features, such as vacuum interruption and SF6 insulation, make them preferable for harsh outdoor conditions. With the right breaker, the protection and lifespan of the system can be improved significantly. Also, the right design choice ensures efficiency, safety, low maintenance, and worry-free high-voltage operations.

Delixi’s outdoor vacuum circuit breakers offer reliable solutions for all-around electrical protection. Their endurance, coupled with low maintenance, makes them suitable for a wide variety of high-voltage applications while outperforming in all conditions, guaranteeing long-term safety.