• 800kV HV Gas Insulated Switchgear (GIS)
800kV HV Gas Insulated Switchgear (GIS)
discuss personally
Model
ZF27-800/6300
Basic info
Brand ROCKWILL
Model NO. 800KV GIS Gas Insulated Switchgear (GIS)
Rated voltage 800kV
Rated normal current 6300A
Series ZF27
Product Detail

Description:

ZF27-800 GIS, developed independently by company for controling, measuring, protecting and transforming the electric transmission line, consists of circuit breaker, current transformer, disconnector, earthing switch, main busbar, bushing and surge arrester, etc. The interrupter of circuit breaker is designed as double-break structure, and the hydraulic operating mechanism avoids the oil leak and slow-opening at zero pressure.

With rated current of 5000A and rated short-circuit breaking current of 50kA, this kind of GIS have been adopted in Substation GuanTing of 750kV power transmission project in Northwest China.

Main Features:

  •  All the hydraulic pipelines are set inside to avoid the leakage, which is domestic initiate.

  •  High current carrying performance with the rated current of 5000A.

  • Excellent insulating level has achieved the high standard of DL/T593-2006.

  • High mechanical endurance and reliability.

Technical Parameters:

1718680412874.png

What is the breaking and closing principle of gas-insulated switchgear?

Opening and Closing Principles:

  • The circuit breaker is the key component in GIS for interrupting and closing circuits. When the circuit breaker receives an opening command, the operating mechanism rapidly separates the moving contact from the stationary contact, creating an arc between them. At this point, the high temperature of the arc causes the SF₆ gas to decompose rapidly, producing a large number of positive and negative ions and free electrons. These charged particles interact with the charged particles in the arc, reducing the concentration of conductive particles in the arc, increasing the arc resistance, and absorbing the energy of the arc. This process causes the arc to cool and extinguish quickly, thereby interrupting the circuit current.

  • During the closing process, the operating mechanism moves the moving contact rapidly towards the stationary contact, ensuring reliable contact at the appropriate moment to complete the circuit connection. It is crucial to ensure that during the closing instant, no excessive inrush current or arc is generated.


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
What are the routine tests for outdoor voltage transformers?
What are the routine tests for outdoor voltage transformers?
1. IntroductionOutdoor voltage transformers are key equipment for ensuring the safety of electrical apparatus. Scientific and comprehensive test analysis is required to avoid hazards and property losses caused by improper operation. Test analysis can guide the formulation of operation strategies and precautions, ensure the stable operation of equipment, and maximize economic and social benefits.2. Concept of Outdoor Voltage TransformersAn outdoor voltage transformer is essentially an outdoor ste
Oliver Watts
07/10/2025
Analysis and Handling of Metering Abnormality of 35 kV Outdoor Combined Transformer
Analysis and Handling of Metering Abnormality of 35 kV Outdoor Combined Transformer
1. IntroductionFrequent occurrences of PT burnout and primary - side fuse melting in combined transformers lead to inaccurate energy meter measurement and seriously threaten the safe operation of the power grid. This paper focuses on the repeated PT damage and fuse melting issues of a 35 kV combined transformer, investigates the fault causes, proposes solutions, and recovers the incorrect electricity quantity through correction coefficients. This effectively reduces grid losses and mitigates ser
Felix Spark
07/10/2025
Analysis of an Explosion Accident of a 35 kV Voltage Transformer
Analysis of an Explosion Accident of a 35 kV Voltage Transformer
Voltage transformers (PTs) consist of iron cores and winding coils, working similarly to transformers but with small capacity. They convert high voltage to low voltage for protection, measurement and metering devices, widely used in plants/stations. Classified by insulation: dry - type (≤6 kV), cast - type (indoor 3 - 35 kV), oil - immersed (outdoor ≥35 kV), and SF₆ gas - filled (for combined appliances).During substation operation, accidents from PT electromagnetic resonance or insulation
Felix Spark
07/10/2025
What Tests Does a Qualified Outdoor Current Transformer Need to Pass?
What Tests Does a Qualified Outdoor Current Transformer Need to Pass?
Hey everyone, I’m Oliver, and I’ve been working in current transformer (CT) testing for 8 years.From running around with test equipment on site to now leading full inspection teams, I’ve seen how thousands of outdoor CTs go through a whole series of tests — like going through a military training camp — before they can finally be put into service.A few days ago, a friend asked me:“Oliver, our factory just produced a new batch of outdoor CTs. We’re getting
Oliver Watts
07/09/2025
What should be noted when selecting and installing outdoor current transformers?
What should be noted when selecting and installing outdoor current transformers?
Hey everyone, I'm James, and I've been working with current transformers (CTs) for 10 years.From running around job sites with my mentor, wiring and debugging equipment, to now leading substation projects and handling all kinds of complex CT issues — I’ve worked with a lot of outdoor current transformers over the years. And trust me, I’ve made mistakes, learned from them, and picked up some real-world experience along the way.A few days ago, a fellow engineer asked me:“Ja
James
07/09/2025
What are the methods to reduce the failure rate of outdoor current transformers?
What are the methods to reduce the failure rate of outdoor current transformers?
I. Research Reasons and Background1. Importance of Current TransformersCurrent transformers play the role of current transformation and electrical isolation. They convert the large current of the primary system into a proportional small secondary current, which is supplied to measuring instruments, relay protection, and automatic devices. In the power system, the role of current transformers is irreplaceable and directly plays a key role in the safe and stable operation of the power grid.2. Hars
Felix Spark
07/09/2025
×
Inquiry
Download
Experts Electrical is dedicated to serving the personnel in the global power industry.
Join Experts Electrical, not only can you discover power equipment and power knowledge, but also canhnd like - minded friends!