Product Description
YRM-12 Fully Insulated and Fully Enclosed Main Ring Unit Switchgear (Standardized), independently developed by our company, has been listed as a high-tech product of Zhejiang Province by China’s National High-Voltage Electrical Apparatus Testing Center in type tests and the Zhejiang Province High-Tech Technology Project. It is widely used in 10kV/6kV power distribution systems and is preferred by various urban and rural users of power distribution systems.
The switchgear is modular and can be combined for various purposes. It consists of two categories: non-expandable unit combinations and expandable unit combinations, to meet the needs of various power substations in flexible applications of compact switchgears.
YRM-12 Fully Insulated and Fully Enclosed Main Ring Unit Switchgear (Standardized) is a completely sealed system, with all live parts and switches enclosed in a stainless steel shell. The entire switchgear is not influenced by external environmental conditions, ensuring reliable operation and personal safety. It is also maintenance-free. Through an expandable bus, any combination is available, and the switchgear is fully modular. The expandable bus is insulated and shielded safely to guarantee high reliability and safety. YRM-12 inflatable switchgear can also provide TV-based automation solutions with the concept of intelligent switchgear, minimizing the work of on-site installation and commissioning.
YRM-12 Fully Insulated and Fully Enclosed Main Ring Unit Switchgear (Standardized) has both non-expandable and expandable standard configurations. Due to its fully-modular and half-modular combination and expandability, it is especially flexible.
YRM-12 Fully Insulated and Fully Enclosed Main Ring Unit Switchgear (Standardized) conforms to GB standards. Its design life is over 30 years in indoor conditions (20°C).
Product Paramenters
| Item | ModuleC | Module F | Module V | |
| Compound switch | Appliance combination | Vacuum switch | ||
| Rated voltage | kV | 12 | 12 | 12 |
| Rated frequency | Hz | 50/60 | 50/60 | 50/60 |
| Power frequency withstand voltage (phase-to-phase/disconnection) | kV | 42/48 | 42/48 | 42/48 |
| Lightningimpulse withstand voltage | kV | 75/85 | 75/85 | 75/85 |
| Rated current | A | 630 | Note: 1) | 630/1250 |
| Rated closed-loop breaking current | A | 630 | ||
| Rated cable charging breaking current | A | 10 | ||
| Rated short-circuit closing current (peak) | A | 50 | 80 | |
| Rated peak withstand current | kA | 50 | ||
| Ratedinstantaneous withstand current | kA/3s | 20 | ||
| Rated short-circuit breaking current | kA | 31.5 | 20/25 | |
| Rated transfer current | A | 1750 | ||
| Maximum fuse current | A | 125 | ||
| Circuit resistance | -N | ≤200 | ≤400 | |
| Mechanical life | time | 5000 | 3000 | 5000 |
