C2SR-12 Chinese solid insulation switch Ring Main Unit
The C25R-12 Chinese-style solid-insulated ring main unit utilizes solid-insulation vacuum technology, an eco-friendly solution free from the greenhouse gas SF6. It serves as a perfect upgrade to traditional SF6-filled switchgear products, featuring a fully insulated, fully sealed, and maintenance-free design with absolutely no exposed live parts. The C25R-12 boasts strong scalability and supports single-sided maintenance and servicing; it is widely deployed in urban and rural power grid modernization projects. Typical installation sites include public squares, roadsides, residential communities, green belts, and other areas with concentrated electricity demand.
Description
Technical Parameters
Product Model: C2SR-12 Chinese-Style Solid-Insulated Ring Main Unit
| project | unit | parameter |
| breaker | ||
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 1250 |
| Rated Frequency | Hz | 50 50 |
| Rated Short-Circuit Breaking Current | kA | 20 31.5 |
| Rated Short-time Withstand Current (Thermal Stability) | kA/s | 20/4 31.5/4 |
| Rated peak withstand current (dynamic stability) | kA/s | 63 80 |
| Insulation Level: Power-Frequency Withstand Voltage (Break) | kV 1min | 42/48 |
| Impulse Withstand Voltage (Gap) | kV 1min | 75/85 |
| Closing Speed | m/s | 0.65±0.2 |
| Opening Speed | m/s | 1.2±0.2 |
| Non-simultaneous Closing and Opening | ms | ≤2 |
| Closing Time | ms | ≤60 |
| Opening Time | ms | ≤50 |
| Closing Bounce Time | ms | ≤2 |
| Mechanical Life | bout | 20000 |
| Protection Class (Enclosure/Switch) | IP4X/IP67 | |
| Load Switch | ||
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 |
| Rated Frequency | Hz | 50 |
| Rated Active Load Breaking Current | A | 630 |
| Rated Closed-Loop Breaking Current | A | 630 |
| 5% Rated Active Load Breaking Current | A | 31.5 |
| Transfer Current | A | 3150 |
| Rated Cable Charging Breaking Current | A | 10 |
| Rated Short-Circuit Breaking Current | kA | – |
| Rated short-time withstand current (thermal stability) | kA/s | 20/4 |
| Rated peak withstand current (dynamic stability) | kA/s | 50 |
| Insulation Level: Power-Frequency Withstand Voltage (Break) | kV 1min | 42/48 |
| Impulse Withstand Voltage (Gap) | kV 1min | 75/85 |
| Closing Speed | m/s | 0.65±0.2 |
| Opening Time | m/s | 1.2±0.2 |
| Non-simultaneous Closing and Opening | ms | ≤2 |
| Mechanical Life | bout | 20000 |
| Protection Class (Enclosure/Switch) | IP4X/IP67 |
Technical Features
Independently Developed
· Environmentally friendly product: utilizes vacuum interrupters and employs dry air as the insulating medium.
· The disconnector and vacuum interrupter are completely enclosed within a stainless steel gas tank filled with dry air; featuring a fully insulated and hermetically sealed design, the tank is constructed from high-quality stainless steel plates using advanced robotic welding technology, achieving an enclosure protection rating of IP67.
· The product features a micro-positive pressure design, enabling safe operation even at zero gauge pressure.
· A pressure relief device (rupture disc) is installed at the bottom of the gas tank; in the event of an internal fault, gas is vented through the lower rear section of the switchgear cabinet, thereby reliably ensuring the personal safety of operators.
· The busbar system features top- or side-extension structures, allowing for selection based on specific operational requirements.
· Equipped with power distribution network automation capabilities, enabling intelligent data transmission, supporting “four-remote” functions (telemetry, telecontrol, telesignaling, and teleadjustment), and meeting the requirements of unmanned substations and digitized network management systems.
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