HV Live tank SF6 gas circuit breaker 52kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Series	RHB
Rated voltage	40.5 kV/52 kV
Rated current	up to 4000A
Rated short-time withstand current(3s)	up to 31.5 kA
Rated peak withstand current	up to 80kA
Rated frequency	50/60 HZ

Description

RHB 52kV Live Tank SF₆ Circuit Breaker is designed for 50/60Hz three-phase outdoor power distribution systems.

It serves for regular circuit switching, overload and short-circuit fault protection of transformers, overhead lines and power equipment, and features reliable mechanical performance to support frequent switching operation under rated working conditions.

Core Advantages

Self-blast arc extinction design: Low operating power, outstanding breaking performance to suppress switching overvoltage effectively.
Three-phase post porcelain insulator construction: Outdoor-type insulation structure, compact layout, high pollution resistance.
Optimized spring operating mechanism: High-strength cast aluminum frame with floating-tooth energy storage structure, full energy stored within 8s; centralized layout for opening/closing springs & oil buffers, low operating impact and contact rebound. Filled with imported low-temperature grease, stable service from -50℃ to +55℃, mechanical life over 10,000 times.
Pointer density relay fitted: Real-time monitoring on SF₆ gas pressure & density for safe running.
Optional built-in / external CT: Built-in CT adopts high-permeability microcrystalline alloy core, accuracy up to 0.2/0.2S for rated current ≥200A; external CT facilitates maintenance and capacity upgrade.
Dry sealed inner cavity filled with SF₆: Avoid internal condensation and dampness. Key auxiliary parts sourced from imported/joint-venture brands; exposed fittings adopt hot-dip galvanization or stainless steel for superior anti-corrosion.
High altitude adaptability: Suitable for installation altitude up to 3000m with premium insulation property.

Main technical parameters

Rated voltage	kV	52
Rated frequency	Hz	50/60
Rated current	A	up to 4000
Rated short-time withstand current(3s)	kA	up to 31.5
Rated peak withstand current	kA	up to 80
1min power-frequency withstand voltage (earth)	kV	95
1min power-frequency withstand voltage (across open contacts)	kV	118
Lightning impulse 1.2/50μs (earth)	kV	200
Lightning impulse 1.2/50μs (across open contacts)	kV	250
Rated filling pressure(abs.@20℃)	MPa	0.5
Minimum functional pressure(abs.@20℃)	MPa	0.4
Ambient temperature range	℃	-30～+40
Installation type	-	Outdoor
Partial discharge	pC	＜5
Annual SF₆ leakage rate	-	＜0.5%
Maintenance cycle	Year	30

Service Environment

Ambient temperature:　-25℃ ~ +40℃
Altitude:　＜1000m
Wind speed:　＜34m/s
Daily temperature difference:　＜25℃
Solar irradiance:　＜0.1W/cm²
Monthly average relative humidity:　＜90%
Ice-coating thickness:　＜10mm
Seismic acceleration resistance:　Horizontal ＜0.2g, vertical ＜0.1g
Installation location:　Outdoor

Outline Dimension Drawing

Order Information

Circuit breaker model & specification
Rated parameters: voltage, rated current, short-circuit breaking current
Application environment: ambient temperature, installation altitude, pollution class
Control & motor operating voltage of operating mechanism
CT configuration: internal/external type, transformation ratio, secondary load & combination
Spare parts & special tools (separate ordering required)

Documentation Resource Library HV Vacuum SF6 circuit breaker

Restricted.

RHB Type Live tank SF6 gas circuit breaker 11kV…550kV

Catalogue

English

Consulting

Public.

RHB-52 Live tank SF6 gas circuit breaker FLYER

Brochure

English

PDF

Public.

RHB-72.5 Live tank SF6 gas circuit breaker FLYER

Brochure

English

PDF

Restricted.

Live Tank Breakers Catalog

Catalogue

English

Consulting

Public.

RHB-40.5 Live tank SF6 gas circuit breaker

Drawings

English

PDF

FAQ for HV Vacuum SF6 circuit breaker

Q: What are the differences between this product and similar products from ABB/Siemens?

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.

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.

Negotiable

Pricing calculator

PDF

RHB-52 Live tank SF6 gas circuit breaker FLYER

PDF

RHB-72.5 Live tank SF6 gas circuit breaker FLYER

PDF

RHB-40.5 Live tank SF6 gas circuit breaker

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Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.