Ringmaster - Ring Main Unit
Verified by manufacturer 4 days ago
RN2d-T1 with Time Limit Fuse (TLF)
RN2d-T1 with Time Limit Fuse (TLF)
Modular, medium-voltage (3.3–11 kV) ring main unit (RMU) designed for safe, reliable switching and protection in electrical distribution networks.
Application
The Ringmaster RN2d is designed for high-voltage distribution networks in industrial, commercial, and utility settings. It is suitable for:
- Open ring and radial feeder networks.
- Urban and suburban distribution substations.
- Industrial plants and large commercial buildings.
- Integration with SCADA or smart grid systems (T5 variant).
- Reliable protection, switching, and automation in MV networks.
It provides flexible options from basic protection (TLF) to relay-based protection (VIP400) and full feeder automation and remote control (Powerlogic T300 RTU), making it adaptable to varying network complexity and operational requirements.
Description
The Ringmaster RN2d is a modular, high-voltage (3.3–11 kV) ring main unit (RMU) designed for safe, reliable switching and protection in electrical distribution networks. It offers a range of integrated protection and automation options, from fuse-based protection (T1), to relay-based protection (T2), and full feeder automation with remote monitoring and control (T5, integrated Powerlogic T300 RTU).
Features and benefits:
- Modular, compact design for flexible installation.
- SF6 Insulated and interruption technology for reliable switching.
- Multiple protection options to suit network requirements.
- Integrated automation and remote monitoring (T5) for smart grid compatibility.
- Safe, easy operation and maintenance.
- Enhances network reliability and reduces downtime.
- Supports remote operation and SCADA integration for advanced control.
- Scalable solution from simple protection (T1) to full automation (T5).
- Improves user safety with modular, easy-to-access compartments.
- Reduces total cost of ownership through flexible configuration.
General information
Color | Grey |
Finish | Smooth |
Material | Metal |
Shape | Rectangle |
Length | 1017 mm |
Width | 954 mm |
Height | 1507 mm |
Warranty description | One year |
Uniclass | |
CAWS | V90/590 Equipment |
SKU Code | RN2d-T1 |
Specification data - High-voltage ring main units
Classification data | |
Standard | To IEC 62271-1, IEC 62271-200 and IEC 62271-100. |
Third-party certification | To ENA TS 41-36. |
Internal arc classification | To IEC 62271-200, Class AF. |
Mounting arrangement | Transformer-mounted. Free-standing. |
Switchgear arrangement | Non-extensible. |
Rated voltage (Ur) | 12 kV. |
Rated frequency | 50 Hz. |
Number of phases | Three. |
Rated insulation levels | |
Rated short-duration power frequency withstand voltage (Ud) | 28 kV for one minute. |
Rated lightning impulse withstand voltage (Up) | 75 kV phase-to-phase, phase-to-earth. |
Rated short-time withstand current (Ik) | 21 kA for three seconds. |
Enclosure | |
Ingress protection (minimum) | To BS EN 60529, IP54. |
Colour | Grey. |
Cable entry | Top. Bottom. Direct coupling to transformer. |
Dimensions | |
Width (maximum) | 974 mm. |
Height (maximum) | 1740 mm. |
Depth (maximum) | 1017 mm. |
Busbars | |
Material | Bare copper. |
Rated continuous current (Ir) | 200 A. 630 A. |
Ring switches | |
Standard | To IEC 62271-102 and IEC 62271-103. |
Format | SF6 with integral fault making earth switch. |
Enclosure | Earth-screened cast resin-encapsulated, sealed for life, maintenance-free. |
Rated continuous current (Ir) | 200 A. 630 A. |
Rated short circuit making current (Ima) | 52.5 kA. |
Switch class | E2. |
Operating mechanism | Independent manual. Motor operated. |
Auxiliary switch | Two normally open and two normally closed contacts. |
Circuit breaker | |
Standard | To IEC 62271-100. |
Format | SF6 with integral fault making earth switch. |
Method of installation | Fixed. |
Rated continuous current (Ir) | 200 A. 630 A. |
Rated short circuit breaking current (Isc) | 21 kA. |
Rated short circuit making current (Ima) | 52.25 kA. |
Rated operating sequence | O – 3 min – CO – 3 min – CO. |
Circuit breaker class | E2. |
Operating mechanism | Independent manual. Guidance for specification option: Spring opening and closing. Motor operated. |
Protection | Time Limit Fuse (TLF). |
Model | RN2d-T1 (TLF). |
Sustainability data
Material | Metal |
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