• 72.5kV Three-phase AC Dead tank type SF6 circuit breaker
72.5kV Three-phase AC Dead tank type SF6 circuit breaker
discuss personally
Model
LW-72.5-3150
Basic info
Brand ROCKWILL
Model NO. 72.5kV Three-phase AC Dead tank type SF6 circuit breaker
Rated voltage 72.5kV
Rated normal current 3150A
Rated frequency 50/60Hz
Series LW
Product Detail

Description:

72.5kV Three-phase AC Dead tank type SF6 circuit breaker is suitable for the rated voltage of 66kV, the rated frequency of 50Hz of the high-voltage transmission and transformation system, through the distribution and combined load current, interrupt the fault current, to achieve the control, measurement and protection of the transmission line, the product structure is compact, the area is small, especially suitable for earthquake-prone areas, polluted areas and areas with relatively small space size. The circuit breaker has excellent breaking performance, and the rated short-circuit breaking current can reach 31.5kA; The product is easy to install and maintain.

Main Features:

  • Excellent breaking performance and long electrical life (>20 operations).

  • Long mechanical life (10,000 cycles), reliable operation, frequent operability, low noise, simple structure, and long maintenance-free period.

  • Low center of gravity, suitable for seismic-prone areas.

  • Out-of-step breaking capability, usable as a tie circuit breaker.

  • Configurable built-in CTs per user requirements, with up to 15 current transformers for measurement or protection.

Technical specifications:

Main mechanical characteristics:

Product use environment:

  • Place of use: outdoor.

  •  Ambient air temperature: -40°C~ +40°C.

  • Altitude: no more than 1000m.

  • Air pollution level: Class IV.

  • Wind pressure: not more than 700Pa (equivalent to wind speed 34 m/s).

  • Earthquake level: no more than 9 degrees.

  • Relative humidity: the average daily relative humidity is not more than 95%; The average monthly relative humidity is not more than 90%.

Note: When the use conditions of the circuit breaker exceed the above provisions, it shall be determined by the user and the manufacturer through negotiation.

Know your supplier
ROCKWILL
Rockwill Electric Group Global Manufacturer of High voltage and medium-voltage power equipment and smart grid solutions. Headquartered in Wenzhou, China. Serving 100+ countries with quality, innovation, and trust. What We Offer: • HV-MV switchgear (VCB, SF₆ circuit breakers, RMU, GIS) • Distribution transformers and substations • Smart grid and monitoring systems • Solar, wind, EV charging, and energy storage solutions • EPC turnkey power projects Certified: ISO 9001 / ISO 14001 / ISO 45001
Main Categories
High voltage
Business Type
Design/Manufacture/Sales
Highest Annual Export (USD)
$150,000,000
Professional Experience
16 years
Workplace
108000m²m²
占位
占位
Related Products
Related Knowledges
Analysis of the Impact of Immersion on the Performance of Low-Voltage Current Transformers
Analysis of the Impact of Immersion on the Performance of Low-Voltage Current Transformers
1 IntroductionLow - voltage current transformers for metering, with a through - core type epoxy resin structure, are widely used in distribution transformer areas and for small - to - medium - sized industrial and commercial electricity consumption. As a range expander for electric energy metering, their performance directly relates to electricity consumption safety and the accuracy of users' trade calculations. Studying long - term immersion's impact on these transformers is practically signifi
Felix Spark
07/17/2025
What is reactive power measurement?
What is reactive power measurement?
The power which exists in the circuit when the voltage and current are out of phase to each other, such type of power is known as the reactive power. The formula measures the reactive power in the circuitReactive Power Measurement & VarmetersReactive power measurement is critical as it indicates circuit power loss: low reactive power worsens load power factor, increasing system losses. Varmeters (volt-ampere reactive meters) measure reactive power and are categorized by circuit phases:Single
Edwiin
07/17/2025
How to Design and Install a Solar PV System?
How to Design and Install a Solar PV System?
Design and Installation of Solar PV SystemsModern society relies on energy for daily needs like industry, heating, transport, and agriculture, mostly met by non-renewable sources (coal, oil, gas). However, these cause environmental harm, are unevenly distributed, and face price volatility due to limited reserves—driving demand for renewable energy.Solar energy, abundant and capable of meeting global needs, stands out. Standalone PV systems (Fig 1) offer energy independence from utilities.
Edwiin
07/17/2025
What are the common faults that occur when low-voltage current transformers are combined with other power equipment?
What are the common faults that occur when low-voltage current transformers are combined with other power equipment?
Low-voltage current transformers, as indispensable measurement and protection devices in power systems, often encounter various faults when used in combination with other power equipment due to environmental factors, equipment linkage issues, and improper installation and maintenance. These faults not only affect the normal operation of power equipment but may also endanger personal safety. Therefore, it is necessary to gain an in-depth understanding of fault types, judgment methods, and prevent
Felix Spark
07/17/2025
What are the monitoring methods and future development trends of low-voltage voltage transformers?
What are the monitoring methods and future development trends of low-voltage voltage transformers?
With the continuous advancement of smart grid technology, intelligent monitoring systems are playing an increasingly important role in preventing and addressing faults in voltage transformers. These modern intelligent monitoring systems can collect key parameters from voltage transformers in real time—such as partial discharge levels, temperature, and oil quality—and use data analysis algorithms to assess the health status of the equipment, enabling early fault warnings and precise l
Echo
07/16/2025
What are the common faults of low-voltage voltage transformers?
What are the common faults of low-voltage voltage transformers?
1. Open - Circuit Fault on the Secondary SideOpen - circuit in the secondary side is a typical fault of low - voltage voltage transformers, showing abnormal voltmeter readings (zero/fluctuation), faulty power meters, buzzing noises, and core overheating. When open - circuited, the secondary voltage spikes (no secondary current to balance the primary EMF), causing core saturation, flux distortion, and potential overheating/damage.Causes include loose terminals, poor contact, or human error. In lo
Oliver Watts
07/16/2025
×
Inquiry
Download
IEE-Business is dedicated to serving the personnel in the global power industry.
Join IEE-Business, not only can you discover power equipment and power knowledge, but also canhnd like - minded friends!