XGN 12kv Indoor Power Distribution Sf6 Ring Main Unit Switchgear Rmu
Air insulated ring network cabinet is a term corresponding to compact gas insulated ring network cabinet. In the early days, air insulated ring network cabinets used VEI vacuum or compressed air load switches, gas producing load switches, and other ring network cabinets. Later, with the widespread use of SM6, it became the main stream of air insulated ring network cabinets. Like other air ring network cabinets, the load switch has been replaced with an SF6 air bag type, which means that the load and grounding three-position switch is installed inside an epoxy resin cast insulation shell. SF6 serves as arc extinguishing and insulation medium.
Description
XGN 12kv indoor power distribution sf6 ring main unit switchgear rmu
Products Description
Air insulated ring network cabinet - expandable SF6 ring network cabinet, can be freely combined, has a small size, is safe and reliable, and does not require maintenance.
SF6 gas is used as insulation and arc extinguishing medium, and the constant magnetic field arc rotation method ensures strong arc extinguishing ability, good breaking performance, low overvoltage, long electrical life, and maintenance free arc extinguishing chamber.
The load switch - fuse combination electrical appliance has a three position function, perfect sealing, reliable operating mechanism and locking.
The grounding switch has a short-circuit closing function.
The cabinet body is formed by stamping and bending with aluminum coated zinc sheet, which is sturdy and reliable.
96 hour salt spray test conducted by the institution.
The insulated busbar of the main busbar shall be separated by metal partitions between cabinets and shall not generate eddy currents. Both ends of the busbar shall be sealed with insulation sealing.
Measures should be taken to prevent electric field concentration and partial discharge at the junction of the main busbar.
The voltage equalizing cover of the fuse ensures the insulation performance of the switchgear, without electric field concentration and partial discharge.
The ring network cabinet includes the following intervals: switch interval, bus interval, cable interval, mechanism interval, and control protection interval
1) Load switch
Load switches have a certain on-load breaking capacity, which means they can be energized to open and close under light loads, but they cannot be operated frequently. Generally, load switches are equipped with fuses and have stronger arc extinguishing ability than isolation switches.
2) Isolation switch
When the circuit breaker disconnects the circuit, the disconnection of the isolation switch allows for a clear separation of the live and dead parts, serving as an auxiliary switch.
Due to the lack of intuitive external indicators for the contact position of circuit breakers, and in some cases, it cannot be guaranteed that its indication is consistent with the position of the contact, it is necessary to use isolation switches to clearly separate the energized and non energized parts.
In addition, the disconnector has a certain ability of natural arc extinguishing, which is often used for the input and disconnection of equipment with small current such as Voltage transformer and lightning arrester, and the connection between a circuit breaker and several equipment, making the switching of circuit breaker through the disconnector more flexible and convenient.
3) Circuit breaker
A switching device that can close, carry, and disconnect the current under normal circuit conditions, and can close, carry, and disconnect the current under abnormal circuit conditions within a specified time.
4) Grounding switch
Mainly used for equipment maintenance, in order to prevent sudden power calls during the maintenance process, both ends of the maintenance equipment must be grounded.
The grounding switch of the high-voltage distribution cabinet is generally grounded on the output load side. When repairing the load side of the high-voltage distribution cabinet (such as tightening bolts, disassembling cables, etc.), we need to disconnect the switch and close the grounding switch of the distribution cabinet at the same time. This can prevent sudden power calls from causing electric shock accidents, and also discharge the remaining charge, which is beneficial for maintenance safety
Environmental Conditions
(1) Suitable Altitude: ≤2000mSuitable
(2) Temperature: -40℃ ~ +55℃Relative
(#) Humidity: Daily mean ≤95%, monthly mean ≤90%
(4) Gradation of Earthquake Damage: ≤ Level 8
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FAQ
Q5 : Is OEM/ODM available?
A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.
Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.
Q7 : Can the price be negotiated?
A: Yes, the price is negotiable. It can be changed according to your quantity or package
Q8 : How about inspection?
A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.
Q9 : What is payment terms?
A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.
Q10 : What is the service offered by company?
A: We have the professional engineer team which can design and develop the mold to arrive different customer requirement.
We also have the sales team to offer good service from pre-sale to after-sale.
This product is usually customized.
We are a manufacturer and have a professional technical department that can design and provide solutions according to customer needs.
Please contact our sales personnel to obtain design drawings
Here are our customer examples for your reference
Malaysian clients
| 7.1 | Technical guarantee schedule : ring main units | ||||
| Item | Description | Unit | Requirement | Guaranteed value | |
| 1.0 | Type /model | - | State | RMU | |
| 2.0 | Insulating medium | - | Vacuum /SF6 | SF6 | |
| 2.1 | Interrupting medium | Vacuum /SF6 | SF6 | ||
| 2.2 | Transformer protection (Fuse/circuit breaker) | circuit breaker | circuit breaker | ||
| 3.0 | Application standard | - | IEC and BS | IEC | |
| 4.1 | Nominal Voltage rating | kV | 11 | 11 | |
| 4.2 | Maximum Voltage rating | kV | 12 | 12 | |
| 4.3 | Rated Frequency | Hz | 50 | 50 | |
| 4.4 | Power Frequency withsand voltage | kV | 28 | 28 | |
| 4.5 | Impulse withstand voltage | KVp | 95 | 95 | |
| 5.0 | Rated current busbars | A | 630 | 630 | |
| 5.1 | Rated Current cable (switch) | A | 630 | 630 | |
| 5.2 | Rated current (T-OFF) | A | 125 | 125 | |
| 5.3 | Rated current for circuit breaker | A | 125 | 125 | |
| 6.0 | Breaking Capacity | ||||
| 6.1 | Closed loop (Cable switch) | A | 630 | 630 | |
| 6.4 | Short circuit breaking current | kA | 20 | 20 | |
| 6.5 | Rated making capacity | kA | 50 | 50 | |
| 6.6 | Rated Short time current 3 sec | kA | 20 | 20 | |
| 7.0 | Dimensions | CTC | CCTC | ||
| Height | mm | 1950 | 1950 | ||
| Width | mm | 1170 | 1545 | ||
| Depth | mm | 750 | 750 | ||
| 8 | Are RMU's manufactured under license, if so state name of the company | HENAN FENGYUAN POWER TECHNOLOGY CO.,LTD. | |||
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