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Home > Ring Main Unit > Wholesale SafeRing-40.5 Gas Insulated Ring Main Unit (RMU) -SF6 Sealed Switchgear Suppliers, Manufacturers
Wholesale SafeRing-40.5 Gas Insulated Ring Main Unit (RMU) -SF6 Sealed Switchgear Suppliers, Manufacturers
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Wholesale SafeRing-40.5 Gas Insulated Ring Main Unit (RMU) -SF6 Sealed Switchgear Suppliers, Manufacturers

Wholesale SafeRing-40.5 Gas Insulated Ring Main Unit (RMU) -SF6 Sealed Switchgear Suppliers, Manufacturers

The Gas Insulated Ring Main Unit (RMU) is a compact, high-performance SF6 sealed switchgear solution designed for reliable medium-voltage power distribution. This advanced Ring Main Unit switchgear features SF6 gas insulation, ensuring superior arc-quenching capability, minimal maintenance, and enhanced safety in confined spaces.

Ideal for urban grids, industrial plants, and renewable energy applications, the Gas Insulated RMU offers exceptional dielectric strength and fault protection. Its sealed SF6 switchgear design prevents external contamination, extending service life and reducing operational risks. The Ring Main Unit supports ring-main and radial configurations, providing flexible network integration.

With a modular, space-saving structure, this SF6 insulated switchgear is suitable for both indoor and outdoor installations. The Gas Insulated Ring Main Unit (RMU) complies with international standards (IEC, IEEE) and ensures reliable operation in harsh environments.

Key benefits of the Ring Main Unit switchgear:

✔ SF6 gas insulation for high efficiency and safety

✔ Compact, maintenance-free sealed switchgear design

✔ Robust construction for long-term reliability

Upgrade your power distribution network with the Gas Insulated RMU – the ultimate SF6 sealed switchgear solution!

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Product Description

Type Designation

Type Designation Diagram
1Manufacturer Code
2Model Type
3Rated Voltage: 40.5 Rated voltage 40.5KV
4Cabinet Type: C: Load Switch Cabinet; F: Fuses Switchgear Cabinet; V: Vacuum Circuit Breaker Cabinet; M: Measuring cabinet; SV,SL,Bus Sectionalizing Switchgear; PT: PT Cabinet(Co-enclosure cabinet composed of any combination of C,F,V,S,VSL.)
5Rated Current: 2500 Rated Current 2500A; 3150 Rated Current 3150A
6Expansion Type: I: Left Extension; D: Right Extension; ID: Both Sides; Blank: extendable
7Cable entry/exit method: L: Left; R: Right; LR: Both; Blank: Front

Technical Parameters

Name Unit Parameter
Rated voltagekV1240.5
Rated currentA1250-31501250-2500
Rated frequencyHz50
Rated short-time withstand currentk/Vs25,31.5
Rated peak withstand currentkA63,80
Rated short-circuit durations4
Mechanical life (Circuit breaker)Times200010000
Annual leakage rate of SF6 gas%≤0.5%
Cabinet protection grade-IP4X / IP65
Service lifeYear≥30

Product Display

Product View 1
Product View 2
Product View 3
Product View 4
Product View 5
Product View 6

Outline and structure diagram

Structure Diagram 1
1. Small bus room11. CM-35 arrester
2. Instrument room12. Pressure release channel
3. Inflatable compartment of main bus13. Cable plug
4. Station disconnector14. Cable socket
5. Operating mechanism room15. Test socket plug
6. Circuit breaker16. Test socket
7. Inflatable compartment of circuit breaker17. Branch bus
8. Cable chamber18. Pressure relief device
9. Current transformer19. Main bus
10. Cable20. Bus coupler socket
Note: a (cabinet width): 600mm, 800mm; b (cabinet depth): 12kV depth is 1420; 40.5kV depth is 1620.
Structure Diagram 2

Ordering Notice

  • Provide product ordering drawings, including wiring diagrams, transformer capacity, and component specifications.
  • Specify requirements for electric energy metering and reactive power automatic compensation configuration.
  • Indicate requirements for product surface treatment.
Frequently Asked Questions
Q1: What is the rated voltage range for this switchgear?
The system supports rated voltages of 12kV and 40.5kV.
Q2: What is the expected service life of the equipment?
The product is designed for a long-term service life of ≥30 years under standard operating conditions.
Q3: What are the protection grades for the cabinet and compartments?
The cabinet shell features an IP4X rating, while the inflatable compartment is rated IP65.
Q4: What types of cabinet configurations are available?
We offer Load Switch (C), Fuses Switchgear (F), Vacuum Circuit Breaker (V), Measuring (M), and PT Cabinets.
Q5: What is the mechanical life of the circuit breaker?
The circuit breaker has a mechanical life of up to 10,000 operations for the 40.5kV model.
Q6: What is the annual SF6 gas leakage rate?
The design ensures an extremely low annual leakage rate of ≤0.5%.

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