RMU cabinets are widely used in urban ring network power supply systems due to their small space occupation, long life, maintenance-free, safe and reliable characteristics. The ring main unit in the cabinet can be equipped with SF6 ring main unit, environmental gas (N2) ring main unit, solid insulation ring main unit, and atmospheric air ring main unit. Automatic laser welding and helium leak detection equipment are used to ensure that the gas cabinet protection level reaches IP67. Cooperating with automated terminals, functions such as protection, remote control, telemetry, automation, and centralized line loss management can be realized. Factory strict performance testing and running-in test before delivery to ensure the quality of each product.
Structure Features:
1. Cabinet material: aluminum-zinc-plate 2mm
2. Including side expansion and top expansion
3. 630A/20kV specification internal arcing duration 1S
4. Shell protection grade: Shell IP41, IK07, air box shell (304/3mm stainless steel) protection grade IP67
5. At the rated voltage Ur, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 5μSv/h; at the power frequency withstand voltage Ud, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 150μSv/h
6. The solubility of the salt solution is (5±1)% (mass ratio), the PH value is 6.5-7.2 at (35±2)ºC, and the spray duration is 168h
Mechanical life test: circuit breaker 10000 times (M2 level), three-station isolation/earth switch 3000 times (M1 level)
Outer box can be designed as per users' requirements.
Due to its special arc extinguishing medium and completely sealed structure, the inflatable cabinet has the characteristics of compact structure, small size, and maintenance-free compared with conventional air-insulated switch cabinets. The sealed structure can also make it suitable for high altitude, high pollution, etc. Severe working conditions and can effectively isolate external environmental influences such as chemical substances and small animals.
Our Advantage:
1.The allowable duration of arcing inside the ring main unit is 1S;
2.The arc test inside the ring main unit reaches IAC-AB level;
3.In the corrosion resistance test (salt spray test), the spray duration reached 168h;
4.Earthing switch closing (E2 level): 20kA 5 times.
5.Enclosure protection level: enclosure IP4X, compartment IP2XC, air box enclosure (304/3mm stainless steel plate) protection level IP67;
6.Ring network cabinet enclosure protection level: enclosure IP41, IK07, air box enclosure (304/3mm stainless steel plate) protection level IP67; The protection level of the ring cage is IP44W.
A: We are both manufacturer & trader. We have our own manufacturer named TIANYI TONGYI ELECTRIC CO.,LTD, who have 27 years experience in electric industry. It covers an totally area of 117,000 m2 with 300 employees, also is a qualified supplier of China National Nuclear Corporation(CNNC) and main supplier for State Grid & China Southern Power Grid.
Q: What is your after-sales service?
A: We always provide free online service and technical support within 24 hours. 18 months warranty for customers.
Q: What is your delivery time?
A: Normally 25~35days. It depends on the order quantity and season. We have very strong capacity to produce top quality products, please inquiry us if you have any questions.
Q: What is the quality warranty time?
A: We have quality certificate CCC, CQC, ISO9001, CE ... Meanwhile, we can provide 18 months warranty for our products. Free online service and technical support within 24 hours is always provided to our customers.
Q: Do you accept ODM and OEM?
A: Yes. We have professional R & D teams to update and develop the latest technology. We also can support ODM or OEM, please send us details drawing to discuss.
Q: What is your payment terms?
A: Generally there are two payment terms:
Q: If I want to visit you, how to go?
A: Our factory is located in Luoyuan County, Fuzhou City. Details address is Songshan Area, Taiwan Investment Zone, Luoyuan County, Fuzhou City, Fujian Province,China.
Q: Do you need agents?
A: Yes, we welcome you to be a partner. Welcome to contact us for more information.
Structure Features:
1. Cabinet material: aluminum-zinc-plate 2mm
2. Including side expansion and top expansion
3. 630A/20kV specification internal arcing duration 1S
4. Shell protection grade: Shell IP41, IK07, air box shell (304/3mm stainless steel) protection grade IP67
5. At the rated voltage Ur, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 5μSv/h; at the power frequency withstand voltage Ud, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 150μSv/h
6. The solubility of the salt solution is (5±1)% (mass ratio), the PH value is 6.5-7.2 at (35±2)ºC, and the spray duration is 168h
Mechanical life test: circuit breaker 10000 times (M2 level), three-station isolation/earth switch 3000 times (M1 level)
Outer box can be designed as per users' requirements.
| NO. | Item | Unit | Data | |||
| Load switch | Combination unit | Breaker | ||||
| 1 | Rated Voltage | kV | 12 | |||
| 2 | Rated frequency | Hz | 50/60 | |||
| 3 | Rated current | A | 630 | 125 | 630 | |
| 4 | 1 min Power frequency withstand voltage | Phase to earth and phase to phase | kV | 42 | ||
| Isolating distance | 48 | |||||
| 5 | Lightning impulse withstand voltage | Phase to earth and phase to phase | kV | 75 | ||
| Isolating distance | 85 | |||||
| 6 | Thermal stable current (effective value) | Main circuit 4S | kA | 20 | ||
| Earthing switch 2S | ||||||
| Earth circuit 4S | 17.4 | |||||
| 7 | Dynamic stable current (peak) | Main circuit 4S | kA | 50 | ||
| Earthing switch 2S | ||||||
| Earth circuit 4S | 43.5 | |||||
| 8 | Rated short-circuit making current(peak) | kA | 50 | |||
| 9 | Rated breaking current of active load | A | 630 | |||
| 10 | Rated closed-loop breaking current | A | 630 | |||
| 11 | 5% Rated breaking current of active load | A | 31.5 | |||
| 12 | Rated cable-charging breaking current | A | 10 | |||
| 13 | Rated short-circuit breaking current | kA | 31.5 | 20 | ||
| 14 | Rated transfer current | A | 1750 | |||
| 15 | Mechanical life | times | 5000 | 5000 | 10000 | |
| 16 | SF6 rated pressure(20ºC gauge pressure) | Mpa | 0.3 | |||
| 17 | SF6 leakage rate | year | ≤0.05% | |||
| 18 | IP grade | gas tank IP67 | ||||
| 19 | Arc test | 20kA/1s | ||||
Due to its special arc extinguishing medium and completely sealed structure, the inflatable cabinet has the characteristics of compact structure, small size, and maintenance-free compared with conventional air-insulated switch cabinets. The sealed structure can also make it suitable for high altitude, high pollution, etc. Severe working conditions and can effectively isolate external environmental influences such as chemical substances and small animals.
Our Advantage:
1.The allowable duration of arcing inside the ring main unit is 1S;
2.The arc test inside the ring main unit reaches IAC-AB level;
3.In the corrosion resistance test (salt spray test), the spray duration reached 168h;
4.Earthing switch closing (E2 level): 20kA 5 times.
5.Enclosure protection level: enclosure IP4X, compartment IP2XC, air box enclosure (304/3mm stainless steel plate) protection level IP67;
6.Ring network cabinet enclosure protection level: enclosure IP41, IK07, air box enclosure (304/3mm stainless steel plate) protection level IP67; The protection level of the ring cage is IP44W.
FAQ
Q: Are you the manufacturer or trader?A: We are both manufacturer & trader. We have our own manufacturer named TIANYI TONGYI ELECTRIC CO.,LTD, who have 27 years experience in electric industry. It covers an totally area of 117,000 m2 with 300 employees, also is a qualified supplier of China National Nuclear Corporation(CNNC) and main supplier for State Grid & China Southern Power Grid.
Q: What is your after-sales service?
A: We always provide free online service and technical support within 24 hours. 18 months warranty for customers.
Q: What is your delivery time?
A: Normally 25~35days. It depends on the order quantity and season. We have very strong capacity to produce top quality products, please inquiry us if you have any questions.
Q: What is the quality warranty time?
A: We have quality certificate CCC, CQC, ISO9001, CE ... Meanwhile, we can provide 18 months warranty for our products. Free online service and technical support within 24 hours is always provided to our customers.
Q: Do you accept ODM and OEM?
A: Yes. We have professional R & D teams to update and develop the latest technology. We also can support ODM or OEM, please send us details drawing to discuss.
Q: What is your payment terms?
A: Generally there are two payment terms:
- 30% advance payment via T/T as a deposit, balance 70% against the shipping documents
- Irrevocable L/C at sight
Q: If I want to visit you, how to go?
A: Our factory is located in Luoyuan County, Fuzhou City. Details address is Songshan Area, Taiwan Investment Zone, Luoyuan County, Fuzhou City, Fujian Province,China.
- The nearest airport is Fuzhou Airport, if you come by air, please arrive in Fuzhou Airport, it takes 1 hour from the airport to our factory
- The nearest train station is Luoyuan Station, if you come by train, please arrive in Luoyuan Station, it takes only 5 minutes to our factory.
Q: Do you need agents?
A: Yes, we welcome you to be a partner. Welcome to contact us for more information.