Dead tank SF6 circuit breaker source manufacturer-800kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Dead tank SF6 circuit breaker source manufacturer-800kV
Rated voltage	800kV
Rated normal current	5000A
Rated frequency	50/60Hz
Series	RHD

Description

800kV Dead Tank SF6 Circuit Breaker is a high-performance ultra-high voltage device designed for critical power transmission systems. Featuring a robust dead tank structure, its live components are sealed in an SF6 gas-insulated metal casing, delivering superior arc extinction efficiency and dielectric strength to rapidly interrupt fault currents and ensure grid stability. The low-center-of-gravity design enhances seismic resistance, adapting to extreme climates and rugged terrains. Integrated with bushings and current transformers, it supports multi-function control for real-time measurement and protective switching. With a mechanical/electrical lifespan exceeding 30 years and a fully sealed design, maintenance frequency is minimized, cutting operational costs. Equipped with anti-misoperation interlocks and dual-insulation safeguards, it prioritizes personnel safety and system reliability. Ideal for UHV grids, power plants, and industrial applications, this breaker sets a benchmark for efficiency and durability in 800kV high-stress environments.

Main Features

Exceptional Arc Extinction and Insulation: Using SF6 gas as the medium, it enables rapid arc extinction and has strong insulation properties. It can quickly interrupt fault currents, ensuring stable operation under high - voltage conditions.
Robust Dead - tank Structure: With a dead - tank design, the live parts are sealed in a metal tank, providing resistance to vibration, dust, and moisture, and enabling adaptation to harsh environments.
Integrated Functional Configuration: Integrates components such as bushings and current transformers, with functions like measurement and protection, simplifying the system layout.
Long Service Life and Low Maintenance: Boasts long mechanical and electrical service lives. The sealed structure reduces component aging, resulting in a long maintenance cycle and low costs.
Multiple Safety Guarantees: Equipped with anti - misoperation interlocking devices and multiple insulation protections to ensure the safety of personnel and equipment.

Technical specifications

Rated voltage		kV	800kV
Rated current		A	5000
Rated frequency		Hz	50/60
Rated short - circuit breaking current		kA	50kA、63kA
Rated short - time withstand current and duration		kA/s	50/3	63/2
Rated peak withstand current		kA	135	171
Rated short - circuit making current		kA	135	171
Number of breaks			2
Rated lightning impulse withstand voltage (peak value)	To ground	kV	2100
	Break		2750
Rated switching impulse withstand voltage (peak value)	To ground	kA	1550
	Break		1950
Rated short - time power - frequency withstand voltage (effective value)	To ground	kA	960
	Break		1420

Documentation Resource Library Dead tank SF6 circuit breaker

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Dead Tank Circuit Breakers Catalog

Catalogue

English

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FAQ for Dead tank SF6 circuit breaker

Q: What applications are a live tank breaker and a dead tank breaker each best suited for?

Live tank breakers are well-suited for outdoor high-voltage distribution with a dispersed layout. Dead tank breakers flexibly adapt to both indoor and outdoor applications, especially in space-constrained substations or where compact installation is required.

Q: Where is the arc extinguishing chamber located in a live tank breaker versus a dead tank breaker?

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.

Q: What are the leakage rate requirements for the arc quenching chamber of a tank-type circuit breaker?

The leakage rate of SF₆ gas must be controlled at an extremely low level, typically not exceeding 1% per year. SF₆ gas is a potent greenhouse gas, with a greenhouse effect 23,900 times that of carbon dioxide. If a leak occurs, it can not only cause environmental pollution but also lead to a decrease in the gas pressure within the arc quenching chamber, affecting the performance and reliability of the circuit breaker.

To monitor the leakage of SF₆ gas, gas leakage detection devices are typically installed on tank-type circuit breakers. These devices help to promptly identify any leaks so that appropriate measures can be taken to address the issue.

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Model

RHD-800

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