SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit
SRM-12 Fully insulated enclosed ring main unit

SRM-12 Fully insulated enclosed ring main unit

The SRM-12 Fully Insulated Enclosed Ring Main Unit (RMU) is a type of high-voltage switchgear used primarily in 10kV or 6kV power distribution systems. The equipment uses a modular unit mode, allowing for combinations to meet various usage requirements. It is divided into fixed unit combinations and expandable unit combinations to meet the flexible use needs of compact switchgear in various substations.

Product Description

Product Overview:

The SRM-12 fully insulated enclosed Ring Main Unit (RMU) is a state-of-the-art medium voltage switchgear designed for use in 12kV electrical distribution systems. This RMU provides reliable and efficient protection, control, and distribution of electrical power. It is ideal for applications in urban and industrial power grids, ensuring the safety and stability of the electrical network.

Structural Features:

  1. Fully Insulated Design:
    • Features a fully insulated design that enhances safety and reliability, preventing accidental contact with live parts.
  2. Enclosed Structure:
    • The enclosed structure provides protection against dust, moisture, and other environmental contaminants, ensuring long-term durability and performance.
  3. Compact and Modular:
    • The compact, modular design allows for easy installation and integration into various switchgear configurations.
  4. SF6 Gas Insulation:
    • Utilizes SF6 gas for excellent insulation properties and reliable arc extinguishing performance.
  5. High-Quality Materials:
    • Constructed from robust materials to withstand harsh environmental conditions and mechanical stress.

Installation Method:

  1. Site Preparation:
    • Ensure the installation site is clean, dry, and free from dust and other contaminants.
  2. Mounting:
    • Securely mount the RMU on a stable and rigid surface using the provided mounting brackets and hardware.
  3. Electrical Connections:
    • Connect the incoming and outgoing cables to the designated terminals, ensuring tight and secure connections. Follow the wiring diagram provided with the RMU for correct electrical connections.
  4. Grounding:
    • Ensure proper grounding of the RMU to prevent electrical hazards. Connect the grounding terminal to the panel or switchgear’s grounding busbar.
  5. Testing:
    • After installation, perform insulation resistance and continuity tests to ensure proper installation and functionality. Verify the operation of the RMU by performing open and close operations several times.

Applicable Environmental Conditions:

  1. Temperature Range:
    • Operating temperature: -25°C to +40°C
    • Storage temperature: -30°C to +40°C
  2. Altitude:
    • Suitable for altitudes up to 1000 meters.
  3. Humidity:
    • Daily average relative humidity: ≤95%
    • Monthly average relative humidity: ≤90%
  4. Water Vapor Pressure:
    • Daily average: ≤2.2×10³MPa
    • Monthly average: ≤1.8×10³MPa
  5. Seismic Resistance:
    • Capable of withstanding earthquakes with a grade less than Degree 8.
  6. Air Quality:
    • The ambient air should not be significantly polluted by dust, smoke, corrosive or flammable gases, vapors, or salt.

Specifications

Content

 

Unit

 

C Module F Module V Module CB Module
Load Switch Load Switch With Fuse Vacuum Switch Disconnector/ Earthing Switch Vacuum Circuit
Breaker
Disconnector/ Earthing Switch
Rated Voltage kv 12 24 36 12 24 36 12 24 36 12 24 36 12 24 36 12 24 36
Rated Frequency Hz 50/60 50/60 50/60 50/60 50/60 50/60
Power Frequency Withstand Voltage in 1 min

 

kv

 

42 52 80 42 52 80 42 52 80 42 52 80 42 52 80 42 52 80
48 58 85 48 58 85 48 58 85 48 58 85 48 58 85 48 58 85
Lightning impulse Withstand Voltage(Peak)

 

kv

 

75 110 170 75 110 170 75 110 170 75 110 170 75 110 170 75 110 170
85 120 180 85 120 180 85 120 180 85 120 180 85 120 180 85 120 180
Rated Current A 630 Note(1) 630 - 1250/630 -
Rated Closed Loop Breaking Current A 630 - - - - -
Rated Cable Charging Breaking Current A 10 - - - - -
Rated Short Circuit Making Current AI Q 50 80 50 50 63 63
Rated Peak Withstand Current KA 50 - 50 - 63 -
Rated Short Time Withstand Current kA/3S 20 - 20 - 25 -
Rated Short Circuit Breaking Current kA - 31.5 20 - 25 -
Rated Transfer Current A - 1700 - - - -
Max.Rated current of fuse A - 125 - - - -
Loop Resistance μ Ω ≤300 ≤600 - - - -
Mechanical Life times 5000 3000 5000 2000 5000 5000

Product Advantages

  • 1. Fully sealed design,all 10kV switches and busbar electrified bodies are sealed in the gas box welded by 3mm stainless steel plate, and the silicon rubber cable plug is applied to achieve the full insulation seal of the cable head, so that it is not affected by external environment such as dust humidity and small animals.
  • 2. The switching device has a perfect “five-preventions”,with simple and clear operation procedures.
  • 3. Modular design. Each unit module can be combined and extended arbitrarily, which is easy to schemes combination, with a wide applicable range.
  • 4. Big capacity for feeder line, small occupation, suitable for a variety of needs,wide range of applications. Equipment maintenance-free, highly reliable performance

Application Places

  • Urban Power Grids:
    • Ideal for use in urban power grids, providing reliable and efficient electrical distribution.
  • Industrial Facilities:
    • Suitable for controlling and protecting electrical equipment in industrial plants and factories.
  • Utility Substations:
    • Used in utility substations to manage medium voltage electrical systems safely.
  • Renewable Energy Systems:
    • Applicable in renewable energy installations such as wind and solar power plants, providing reliable switching and protection.

Packing

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Faq

  • 1. What are the core components of the Ring Main Unit?

    Ring cabinet, also known as the Ring Main Unit, is a kind of transmission and distribution electrical equipment, its core components mainly include load switch, fuse, circuit breaker, current transformer, voltage transformer, instrument, protective relay and so on.

  • 2. What are the main features of the SRM-12 RMU?

    The SRM-12 RMU features a fully sealed design, ensuring that all 10kV switches and electrified bodies are sealed in a gas box made of stainless steel, providing full insulation and protection from external elements. It also has a modular design, allowing for easy combination and extension of unit modules, and is maintenance-free with a highly reliable performance 23.

  • 3. What are the environmental conditions for the SRM-12 RMU?

    The RMU should operate in ambient temperatures no higher than +40°C and no less than -40°C, with an average temperature no more than +35°C within 24 hours. It is also suitable for altitudes up to 2000m, with relative humidity and vapor pressure within specified limits, and should be installed in locations free from fire, explosion hazards, severe pollution, chemical corrosion, and intense vibration.

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