Fully Sealed HV GIS Gas SF6 Insulated Switchgear

Fully sealed HV GIS Gas SF6 Insulated Switchgear

Our inflatable SF6 metal seal full insulation series ring network switch cabinet has passed the type test of the national occlusal electrical testing center. Widely used in 10KV/6K power distribution system, it is the preferred switch product for various users in urban and rural areas.

switch cabinet is modular unit mode, which can be combined according to different purposes. By the combination of fixed units and expandable units, which substation meets the need of compact switchgear flexible use.

Inflatable ring SF6 cabinet is divided into non-expandable standard configuration and expandable standard configuration. Due to the combination of full module and half module and its own scalability, it has extremely special flexibility. SF6 inflatable ring cabinet implemented GB standard. Under the condition of the interior (20 ℃) run the design life of more than 30 years.

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

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 to prevent electric field concentration and partial discharge shall be taken at the junction of main bus.

The fuse grading cover ensures the insulation performance of the switch cabinet, 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 isolation switch has a certain natural arc extinguishing ability, which is commonly used for the input and disconnection of low current equipment such as voltage transformers and lightning arresters, as well as the connection between a circuit breaker and several devices, making the switching of the circuit breaker through the isolation switch 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

Common switchgear faults include the following categories:

(1) Misoperation and refusal to operate faults. Such faults may be caused by mechanical faults in the transmission system and operating mechanism, or by electrical control and auxiliary circuit problems; The mechanical faults of the operating mechanism and transmission system are mainly manifested as mechanism jamming, component deformation, displacement or damage, loose and stuck opening and closing iron core, loose shaft pin, tripping failure, etc. Electrical control and auxiliary circuit faults are manifested as poor contact in the secondary wiring, loose terminals, incorrect wiring, burning of the opening and closing coils due to stuck mechanisms or poor transfer switches, ineffective switching of auxiliary switches, as well as faults in operating power supplies, closing contactors, microswitches, etc.

(2) Breaking and closing faults. This type of fault is caused by the circuit breaker body, and for low oil circuit breakers, it mainly manifests as fuel injection short circuit, arc extinguishing chamber burning loss, insufficient breaking capacity, and explosion when closed. For vacuum circuit breakers, it manifests as air leakage in the arc extinguishing chamber and bellows, reduced vacuum, and reignition of the capacitor bank. Cracking of ceramic pipes, etc.

(3) Current carrying fault. This type of fault is mainly caused by poor contact of the isolation plug in the switchgear, which leads to contact melting;

(4) Insulation fault. This mainly includes inter phase or phase to ground short circuit of the busbar, discharge between the busbar and the bushing, discharge of dynamic and static contacts, and hidden danger discharge in the cable compartment. The typical types of faults are external insulation to ground flashover, internal insulation to ground flashover, inter phase insulation flashover, lightning overvoltage flashover, porcelain bushing, capacitor bushing flashover, pollution flashover, breakdown, explosion, lifting rod flashover, CT explosion, breakdown, flashover, Broken porcelain bottles, etc.

(5) External forces and other faults. This includes impacts from external objects, natural disasters, and short circuits caused by animals.

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

Zimbabwean 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.

 

IF NEED MORE DETAILES,PLEASE FEEL FREE YO CONTACT US

 

Hot Tags: fully sealed hv gis gas sf6 insulated switchgear, China, manufacturers, suppliers, customized, metal switchgear, Solid Insulated Switchgear, High Voltage Ring Main Unit, hv ring main unit, high voltage GIS switchgear, Ring Main Unit