EN
Medium-Voltage Ring Main Unit
Medium-Voltage Ring Main Unit is configured to the purchaser's network, load and site requirements. The typical range below is for product-page reference; final guaranteed values are confirmed in the approved technical schedule.
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RATED VOLTAGE |
RATED CAPACITY |
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STANDARDS BASIS |
TYPICAL APPLICATION |
- Overview
- Recommended Products
- Load-break switch, fused switch or circuit breaker.
- extensible or compact arrangement.
- air, solid or gas insulation by project.
- Single-line diagram, rated voltage/current and frequency.
- Short-circuit level, bus arrangement and feeder schedule.
- Protection relay, metering, interlocking and communication requirements.
- Internal-arc/IP requirement, cable interface, auxiliary supply and standard.
- Load-break switch, fused switch or circuit breaker.
- extensible or compact arrangement.
- air, solid or gas insulation by project.
- Utility transmission and distribution substations.
- Industrial and infrastructure power systems.
- Renewable-energy and commercial distribution.
Appurtenance
Inquiry
Please provide the following information so the product selection and quotation can be prepared accurately:
Overview
General Product Overview
The medium-voltage ring main unit provides compact switching and protection for ring or radial distribution networks. Functional units, insulation technology, extensibility, cable interfaces, protection and remote-control requirements are selected for the network arrangement.
Main Technical Specifications
Parameter |
Typical range / configuration basis |
Rated voltage |
12-40.5 kV |
Rated capacity |
Up to 1,250 A typical |
Frequency |
50 Hz or 60 Hz; utility-specific where applicable |
Standards basis |
IEC 62271-200 |
Rated current |
Selected from the approved load schedule and bus arrangement |
Short-circuit duty |
Confirmed from the system fault study |
Protection |
Relay, metering, interlocking and trip logic by single-line diagram |
Communication |
Hardwired or digital interfaces to the project SCADA/BMS |
Protection and Control Configuration
The equipment lineup is built from the single-line diagram, fault study and feeder schedule. Breaker ratings, busbar system, protection logic, metering, interlocks, cable compartments and communication interfaces are confirmed in the approved drawings.
Main Applications
Urban distribution, compact substations, renewable plants and commercial networks.
Engineering Support
Apex supports requirement review, product selection, drawing and interface coordination, manufacturing follow-up, inspection/test-document coordination, export packing and delivery planning. The final scope is defined in the quotation and approved technical agreement.
Recommended Products
High-Voltage GIS Switchgear | KYN28 Metal-Clad MV Switchgear | GCS Withdrawable LV Switchgear
