Stable Performance HV Vacuum circuit breaker 126/145kV
Key attributes
| Brand | ROCKWILL |
| Series | RVB |
| Rated Voltage | 145kV |
| Rated Current | 3150A |
| Rated Frequency | 50/60 |
Description
Product introduction
The 126(145)kV HV Vacuum circuit breaker is a cutting - edge high - voltage electrical device designed to ensure the safe and efficient operation of power systems. Leveraging vacuum as the arc - extinguishing and insulating medium, it boasts exceptional performance in rapidly interrupting fault currents, preventing arc re - ignition, and maintaining stable insulation. Its robust construction and advanced operating mechanisms guarantee reliable switching capabilities, even under extreme conditions. Ideal for substations and critical transmission lines, this breaker combines high - voltage handling capacity with long - term durability, reducing maintenance needs and enhancing overall grid reliability.
Main characteristic
- High - Voltage Rating: Designed for 126(145)kV, suitable for major transmission and distribution systems.
- Vacuum - based Arc Extinction: Ensures rapid arc quenching and prevents re - ignition for reliable operation.
- Robust Construction: Built to withstand extreme conditions, providing mechanical stability and durability.
- Efficient Fault Interruption: Quickly cuts off fault currents to protect power grid equipment.
- Low Maintenance: Long - lasting performance reduces the frequency of servicing requirements.
Main technical parameters
| Parameter | Unit | Value (145kV) |
|---|---|---|
| Rated Voltage (Ur) | kV | 126,145,150,170 |
| Rated Frequency | Hz | 50/60 |
| Rated Current (Ir) | A | 3150 |
| Rated Short-Circuit Breaking Current | kA | 40 |
| Rated 3s Short-Time Withstand Current (Ik) | kA | 40 |
| Rated Peak Withstand Current (Ip) | kA | 100 |
| Rated Short-Circuit Duration (tk) | s | 3 |
| 1min Power-Frequency Withstand Voltage (to earth) | kV | 230,275,275,325 |
| 1min Power-Frequency Withstand Voltage (across open contacts) | kV | 265,275,315,365 |
| Rated Lightning Impulse Withstand Voltage (to earth) | kV | 550,650,650,750 |
| Rated Lightning Impulse Withstand Voltage (across open contacts) | kV | 630,750,750,860 |
| Vacuum Interrupter Vacuum Degree | Pa | ≤1×10⁻³ |
| Operating Ambient Temperature | °C | –40 ~ +55 |
Instructions on placing orders
- Model and format of the circuit breaker.
- Rated electrical parameters (voltage, current, breaking current, etc).
- Working conditions for using (environment temperature, altitude, and environment pollution level).
- Rated control circuit electrical parameters (Rated voltage of energy-store moter and Rated voltage of opening, closing coil).
- Names and quantities of spare items needed, parts and special equipment and tools (to be otherwise ordered).
- The wire connecting direction of the primary upper terminal.
Documentation Resource Library Vacuum circuit breaker
FAQ for Vacuum circuit breaker
The HV Vacuum circuit breaker utilizes a high-performance vacuum as both the insulating and arc-extinguishing medium. This technology allows the device to quench electrical arcs almost instantaneously, preventing re-ignition and ensuring the safe interruption of fault currents without the environmental risks associated with $SF_6$ gas.
Q:At what voltage levels is this HV Vacuum circuit breaker typically deployed?
A:This specific HV Vacuum circuit breaker is designed for the 126kV to 145kV range. These ratings make it an ideal choice for major transmission and distribution systems, as well as critical utility substations requiring high-voltage handling capacity and stable insulation.
Q:How does the HV Vacuum circuit breaker contribute to lower operational costs?
A:Due to the stable nature of vacuum interrupters and the use of advanced, robust operating mechanisms, this HV Vacuum circuit breaker is designed for long-term durability with low maintenance requirements. Its ability to perform frequent switching operations with minimal wear significantly reduces the total cost of ownership for grid operators.
Q:Is the HV Vacuum circuit breaker reliable under extreme environmental conditions?
A:Yes. The HV Vacuum circuit breaker is built with a robust construction and a stable mechanical structure designed to withstand harsh outdoor environments. Its advanced operating mechanism guarantees reliable switching and efficient fault protection even under extreme weather conditions, enhancing overall grid reliability.
ABB’s high-voltage live-tank vacuum breakers are reliable but costly with long lead times. Hitachi Energy is mature yet lacks local high-voltage track records and smart features. Schneider Electric excels in 40.5kV distribution but is limited in voltage range and extreme performance. In contrast, Rockwill offers up to 363kV SF₆-free vacuum solutions with fast local service and spare parts delivery. Featuring robust mechanisms, full smart functions, and superior resistance to extreme cold, heavy salt fog, and short-circuit currents, our breakers ensure long maintenance-free service and lower LCC.
Q:Can Rockwill custom-engineer or modify Live tank Vacuum circuit breaker specifications to meet project-specific requirements?
A:
Rockwill provides comprehensive customized design and parameter modification for live tank vacuum circuit breakers to meet diverse project requirements. Backed by our professional R&D team, we flexibly adjust product structures, technical parameters and environmental adaptability, delivering exclusive tailored solutions in line with various on-site conditions and project standards.
In a live tank breaker, the arc chamber is mounted at the top or side of the column, exposed to ambient air. In a dead tank breaker, the arc chamber is placed inside the metal tank, fully sealed.
live tank circuit breaker is a structural form of high-voltage circuit breaker, which is characterized by the use of ceramic insulation pillars to support key components such as arc extinguishing chamber and operating mechanism. The arc extinguishing chamber is usually arranged on the top or pillar of the ceramic pillar. It is mainly suitable for medium and high voltage power systems, with voltage levels covering the range of 72.5 kV to 1100 kV. live tank circuit breakers are common control and protection equipment in outdoor distribution devices such as 110 kV, 220 kV, 550 kV, and 800 kV substations.
