The LW36A-126/145 high-voltage AC sulfur hexauoride Circuit Breaker is a new generation of self powered high-voltage sulfur hexauoride circuit breaker developed by Xi'an High Voltage Apparatus Research Institute and our company based on the LW36-126. We have summarized various technical and process problems encountered in the production, manufacturing, and operation of products by more than ten production units transferred from Xi'an High Voltage Apparatus Research Institute in recent years, and have improved, enhanced, and peected them. e product is suitable for closing, cutting o load current and sho-circuit fault current of AC 50Hz, 126kV power systems in areas below 2500 meters above sea level, controlling and protecting power equipment and contact lines.

The circuit breaker uses SF6 gas (a mixture of SF6 and CF4 gas is used in high-altitude areas) as the Insulation and arc extinguishing medium, adopts the self energy arc extinguishing principle, and is equipped with a spring operated mechanism. It has the characteristics of strong breaking ability, low operating power, and high reliability. e product has passed comprehensive type tests at the Xi'an High Voltage Apparatus Research Institute of the National High Voltage Apparatus Quality Supeision Center.

1.Model and meaning

2.Main technical parameters

Main parameters of circuit breaker

Circuit Breaker Main Parameters

A circuit breaker is an essential electrical safety device used to protect electrical circuits from damage caused by overloads or short circuits. It automatically disconnects the power supply in the event of a fault, preventing fire hazards, equipment damage, and ensuring the safety of electrical systems. The main parameters of a circuit breaker include:

1. Rated Voltage
   The rated voltage is the maximum voltage a circuit breaker can safely handle. It is crucial for determining the application and installation environment of the breaker. Circuit breakers are available for low, medium, and high-voltage systems.

2. Rated Current
   Rated current refers to the maximum continuous current that the circuit breaker can carry without tripping. It is typically specified in amperes (A). The rated current is important for selecting the correct breaker size to avoid nuisance trips.

3. Breaking Capacity
   Breaking capacity, also known as short-circuit breaking capacity, is the maximum fault current the circuit breaker can safely interrupt without being damaged. This is measured in kiloamperes (kA). A higher breaking capacity is necessary for circuits with large potential fault currents.

4. Tripping Characteristics
   Tripping characteristics describe how a circuit breaker reacts to overcurrent conditions. Common types are:

• Thermal: Triggers based on time and temperature for overload protection.

• Magnetic: Triggers instantly when a short circuit occurs, protecting against immediate damage.

5. Operating Mechanism
   Circuit breakers can have either a manual or automatic operating mechanism. Manual breakers require human intervention for resetting, while automatic breakers reset themselves after a fault is cleared, offering convenience and reducing downtime.

6. Poles
   The number of poles indicates how many separate electrical circuits a breaker can control. Single-pole breakers are used for single-phase circuits, while multi-pole breakers (e.g., two-pole, three-pole) are used for three-phase circuits.

7. Interrupting Time
   Interrupting time is the time it takes for the breaker to disconnect the circuit once a fault is detected. A shorter interrupting time helps prevent damage to electrical equipment.

8. Auxiliary Contacts
   These contacts are additional features that allow external signals to be generated when the breaker trips or operates. They are used for monitoring or control purposes in complex systems.

9. Service Life
   The service life of a circuit breaker is the number of operations it can perform before requiring maintenance or replacement. A higher service life is indicative of better reliability and durability.

10. Mounting Type
    Circuit breakers can be mounted in various ways, including panel mounting or DIN rail mounting, depending on the application and space constraints.

By understanding these parameters, you can select the right circuit breaker for your application, ensuring both safety and efficient operation of your electrical system.

Conclusion
Circuit breakers are vital for protecting electrical systems from damage and ensuring safety. Understanding their key parameters—such as rated voltage, current, breaking capacity, and tripping characteristics—helps in selecting the right model for your needs, enhancing both reliability and safety in electrical installations.