RMU Ring Main Unit
01
SF6 Gas-Insulated Switchgear (GIS)
PRODUCT PARAMETERS
Item |
Unit |
Parameters |
Rated Voltage |
kV |
12 |
Rated Current |
A |
1250/2500/3150 |
Rated Frequency |
Hz |
50 |
Rated Power Frequency Withstand Voltage |
kV |
Phase-to-Phase, Phase-to-Ground: 42 / Isolation Gap: 48 |
Rated Lightning Impulse Withstand Voltage |
kV |
Phase-to-Phase, Phase-to-Ground: 75 / Isolation Gap: 85 |
Secondary Circuit Power Frequency Withstand Voltage |
V |
2000 |
Rated Short-Time Withstand Current (4s) |
kA |
25/31.5/40 |
Rated Short-Circuit Breaking Current |
kA |
63/80/100 |
Rated Peak Withstand Current |
kA |
63/80/100 |
Rated Short-Circuit Making Current |
kA |
25/31.5/40 |
Rated Operating Sequence |
- |
O-0.3s-CO-180s-CO |
Mechanical Life (Circuit Breaker) |
Operations |
10,000 |
Mechanical Life (Isolation Switch) |
Operations |
3,000 |
Mechanical Life (Grounding Switch) |
Operations |
3,000 |
Protection Level |
- |
Gas-filled IP67 / Cabinet IP4X |
Gas Medium |
- |
SF₆ |
Gas System Pressure (20°C Standard) |
MPa |
0.025 |
Gas Leakage Rate |
μL/L |
≤ 150 |
Gas Service Life |
Years |
≤ 30 |
Product Dimensions (External) |
mm |
500(W) × 2530(D) × 1050(H) (1250A) |
600(W) × 2530(D) × 1050(H) (1250A) |
||
800(W) × 2530(D) × 1400(H) (2500A) |
||
900(W) × 2530(D) × 1400(H) (3150A) |
Product Features
Safe and Reliable:
SF6 gas is used as the insulating medium, providing exceptionally high insulation strength and arc-extinguishing performance, ensuring the safe operation of the equipment.
Compact Design:
Compared to traditional air-insulated equipment, GIS cabinets are significantly smaller, requiring only 26% of the installation area of conventional systems, saving valuable space.
Maintenance-Free:
Thanks to the sealed design and high-quality materials, GIS cabinets require almost no maintenance throughout their service life, greatly reducing operating costs.
Strong Environmental Adaptability:
Unaffected by external environmental conditions, GIS cabinets can operate reliably in harsh environments such as high altitudes, humidity, and pollution.
Long Service Life:
The equipment has a lifespan of up to 30 years, reducing replacement frequency and improving economic efficiency.
Product Components
Circuit Breaker: Interrupts the current in a circuit during faults, using vacuum or SF6 gas as the insulating medium.
Isolator: Used to isolate a part of the circuit from the rest of the system for maintenance or testing purposes, employing SF6 gas as the insulating medium.
Busbar: A conductor connecting different parts of the circuit, such as generators or transformers, utilizing SF6 gas for insulation.
Transformer: Alters the voltage level in the circuit. Using SF6 gas as the insulating medium, it can be a power transformer or an instrument transformer.
Earthing Switch: Connects a part of the circuit to the ground to ensure safety, with SF6 gas serving as the insulating medium.
Surge Arrester: Protects the circuit from overvoltage caused by lightning strikes or switching operations, using SF6 gas as the insulating medium.
Contact Information
For more details, please contact us:
Company Name: KENJING GROUP Co., Ltd.
Phone: +86-15888718229
Email: john@china-kenjing.com