Best Quality High Voltage 24kV Ring Main Unit (RMU) Switchgear

Normal conditions
1) The Standard altitude does not exceed 1000m;can up to 4500m for special ordering2) The ambient temperature is between -25°C to +45°C, the daily mean temperature is no greater than 35°C.3) The daily mean relative humidity is no greater than 95%.The monthly mean relative humidity is no greater than 90%.


4)Earthquake intensity≤8 degree;6)Applicable occasions should be free from inflammables,explosives, corrosives,and severe vibration.
Specification Summary
GPR-24 series Ring Main Unit is an extensible, SF6 insulated switchgear, with rated voltage of 12&24 kV. All its HV live parts are contained in an air-tight gas tank, which is made from stainless steel of 3mm. The whole switching assembly is SF6 insulated, and free from any external influence, ensuring it great reliability of service and maintenance free. By plug-in type busbar extension, GPR-24 series Ring Main Unit can be of free combination and full modularization. The busbar extension has passed type test for power and thermal stability, and is fully insulated and shielded, exhibiting high reliability and safety. GPR-24 series Ring Main unit is suitable for all MV network up to 24 kV, all compact power stations, power distribution substations in all important industries, such as petrol-chemical industry, metallurgical and mining industries, and all transformer substations and wind power system.
Products feature
1.Advanced process technique for gas tank
The digital-controlled laser cutting and punching system and three-dimension and five-axis laser welding system imported from Germany with ensure the gas tightness and uniformity of all gas tanks.
The fully automatic and integral helium leak detection system, made by SEILER Vakuumtechnik GmbH, through detecting of Helium leakage by mass spectrograph, brings gas leakage rate per year down to less than 0.02%, ensuring the life span of gas tank of over 30 years.
Advanced process technique for parts .
All epoxy resin insulated parts, including insulated poles, are manufactured by fully-automatic and digitally controlled epoxy resin vacuum mixing/pressure gelatinizing system from Hedrich (Germany) .
The busbar connector, cable connector, end-plug and other silicone rubber insulated parts are manufactured by fully-automatic and digitally controlled silicone rubber mixing/pressure gelatinizing system from VOGEL(Switzerland).

2.Excellent solutions for products
With small and compact structure, the basic functional units K, T, V, B and C have uniform dimension: 350*800*1380 mm (width*depth*height) .
Complete solutions:
Single version: load break switch unit, switch-fuse unit, vacuum circuit breaker unit, busbar subsection unit, cable unit, metering unit, etc.
Block version can be made up of two, three, four, five or six functional units.
Single units and block version can be connected by busbar connectors flexibly.

3.trong adaptability to the environment
The primary conductive system is fully sealed in the SF6 gas tank and will not be influenced by the outside environment, independent of the impact of dew, dust, salt fog, etc. Therefore, GPR-24 series can be applied at various severe service conditions.
Product ParametersDescriptionUnitLBS UnitSwitch-fuse UnitVCBUnitBusbar subsection unitRated voltageKV24242424Power frequency withstand voltage (1min)Phase to phase/earthKV50, (65)*50, (65)*50, (65)*50, (65)*Across the isolating distanceKV64, (79)*64, (79)*64, (79)*64, (79)*mpulse withstand voltagePhase to phase/earthKV95, (125)*95, (125)*95, (125)*95, (125)*Across the isolating distanceKV110, (145)*110, (145)*110, (145)*110, (145)*Rated frequencyHz50,6050,6050,6050,60Rated currentA630①630630Rated short circuit breaking currentKA②20Rated short time withstand currentKA/s20/3(20/4)*20/3,(20/4)*
20/3
(20/4)*Rated peak withstand currentKA505050Rated short circuit making currentKA50②5050Rated transfer currentA1400Rated active load breaking currentA630630Rated closed loop breaking currentA6306305% rated active load breaking currentA31.531.5Rated operating sequenceO-0.3s-CO-180s-COMechanical lifetimeOps50005000100005000Electrical lifetimeE3E2E3Thickness of stainless steelmm3.0Rated SF6 pressureKPa30 (at 20℃ , 101.3kPa)Annual leakage rate＜ 0.02%Water treatment test24kV 24 hours (at 30 kPa under the water)Internal arc test20KA 1s
Protection degreeGas tankIP67Fuse holderIP67GPR enclosureIP4XPacking & Delivery
Packing Details : Packing, Film covered, Pallets, Vacuum package with plywood case, Plywood case
Delivery Details : 3-30 days after confirmed orderHigh quality
Passed the ISO9001:2008 quality system authentication.
Professional Sales
Well-trained & experienced staff are to answer all your inquiries.Zero After-sales
Strictly QC control and 100% finished Inspection to ensure correctly.FAQQ1: How to pay sample and express charges?
A: For express charges, you can pay to our company account directly, for those customer who has express account, we will send the samples by freight collected. If customers need samples, we will charge the cost first, once they place orders, we will return a part cost to their account.
Q2: What is your terms of payment?
A: Usually, we accept T/T, for regular order, we prefer 50% in advance, 50% against the pictures of finished material before delivery.
Q3: How do you control the quality?
A: We have QC team comply with TQM, each step is in compliance to the standards, at the same time, and we will take photos and shoot video for you.
Q4: What about lead or shipping time?
A: The lead time depends on quantity you ordered, but generally within 2~5 weeks upon receipt of advance payment.
Q5: How long does it take for me to get the quotation?
A: For customized products, we will quote after you provide the requested product details within 48 hours because we need the time to calculate cost, but we will quote the soonest possible. For our standard product posted here we can quote in 24 hours.
Q6: Why should I choose your company?
A: We take customers’ requirements as our mission, and take each details very carefully. We have about 15 years’ experience for electric power business. We try to support our customers always, including delivery time, price, pre-sale, after-sales, though we are not the best, but we are always to improve ourselves and meet your needs. Choose us, will don't make you disappointed.
Q7. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q8: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q9: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
Q10: How to contact with us?
Contact us now by email gp(at)sinogp.com or whatapps +86 188 577 49 777