Products Description
Product Introduction
This 12kv indoor Ring Main unit is our solution to the specific challenges of indoor medium voltage power distribution. Its design is suitable for small spaces and provides solid and reliable performance even under harsh conditions. You can find it in office buildings, precision electronic equipment factories, hospitals, refurbished old buildings, and underground substations-any place with limited space, high humidity, and strict safety standards. With its reliable operation, user-friendly design and low daily operating costs, it is very suitable for buyers around the world looking for a practical indoor MV solution.
Products Features
Moisture-proof & stable insulation
The cabinet is completely sealed and equipped with a moisture-proof insulation system. Internally, we use VPI-treated Nomex insulation paper, which is rated for F-level thermal durability. This means that even if the humidity rises to 95%, the insulation can remain reliable. From -25℃ to 40℃, the device keeps working without moisture-related failures.
Fire safety you can trust
It is completely oil-free, made of flame-retardant materials, and has UL94V-0 certification. It complies with the standards IEC60694 and GB50054-2011. A dedicated fire-fighting connection interface allows it to be directly connected to your building's fire-fighting system, so the inspection runs smoothly without the need for additional protection devices.
Efficiency leap Precision and stability
Compared with national standards, no-load loss is reduced by 20% and load loss is reduced by 15%, which is in line with DOE2 energy efficiency. Take the 1000kVA model for example: it can save about 12,000 yuan in electricity bills every year. Since the working noise is kept below 55 decibels, there is no need to increase the sound insulation function, which helps to reduce the overall cost.
Space-saving and easy to maintain
At only 600 mm deep, the modular, ultra-thin design saves about 30% of the space required for traditional units. It can be installed on the wall or wired before installation. If a module fails, it can be replaced within 30 minutes. A clear status window allows you to instantly view the operation of things, making maintenance simple.
Intelligent monitoring and customized services
A built-in intelligent system observes the temperature and local discharge in real time, and if there are any problems, it sends a remote alarm via RS485. We also adjust the equipment according to the specific needs of your project, provide support from initial planning to after-sales service, and a 2-year peace of mind warranty.
| Project | Parameter | |||
| Load Switchgear (C) | Combined Elecctric Cabinet (F) | Circuit Breaker Cabinet(V) | ||
| Rated Voltage | 12kV | |||
| Rated Frequency | 50HZ | |||
| Rated Current | 630A | 1250A (Depends on Fuse Current) | 630A/1250A | |
| Rated Transfer Current | / | 1750A | / | |
| Cable Charging Break Current | 40A | 25A | ||
| No-load Transformer Breaking Current | 16A | 16A | ||
| 1 mimute Power Frequency Voltage Withstand |
Interphase with and against the ground | 42kV | ||
| Fracture | 48kV | |||
| Lighting Shock Withstand Voltage | Interphase with and against the ground | 75kV | ||
| Fracture | 85kV | |||
| Mechanical Life | The Main Switch | ≥5000 times | ≥10000 times | |
| Grounding Switch | ≥3000 times | |||
| Main Circuit Resistance | ≤120μΩ | ≤400μΩ | ≤200μΩ | |
| SF6 Gas Pressure Rating (20℃) | 0.035MPa | |||
| Annual Leakage Rate of SF6 Gas | 0.01% | |||
| Rated Power Supply Voltage of Secondary Loop | AC220V/DC110/DC48V/DC24V | |||
| 1 minute Power Frequency withstand Voltage of Secondary Loop | 2kV | |||
| Protection Grade | Aeration Tank | IP67 | ||
| Shell and Operating Mechanism | IP4X | |||
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