RUM Indoor High Voltage SF6 Gas Insulated Switchgear is a new type of SF6 gas-insulated medium-voltage switchgear independently developed by Timetric Electric. The product adopts a modular design and can be arranged arbitrarily according to different design schemes to achieve a perfect combination of common box units and extended units, meeting the needs of various secondary transmission and distribution substations for flexible use of compact switchgear. It is a completely sealed system, all of whose primary components are enclosed in a stainless steel shell and are not affected by the environment; it has the characteristics of reliable operation, safety, compact structural design, small footprint, maintenance-free, and long life. RUM Indoor High Voltage SF6 Gas Insulated Switchgear products have passed the type test of the National High Voltage Electrical Equipment Test Center and are widely used in small secondary distribution stations, box-type switchgear stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways, subways, tunnels and places with harsh natural conditions.
RUM Indoor High Voltage SF6 Gas Insulated Switchgear is an air-insulated or gas-insulated medium-voltage electrical combination device that can be combined into multiple circuits at will, with the functions of switching, connecting, and protecting the power system, and with load switches as the core components. Its main circuit core components are composed of SF6 load switches or additional circuit breakers and other primary auxiliary electrical appliances. SF6 ring network cabinets can be divided into expandable and non-expandable types according to the combination method, such as: Safering and Safeplus (ABB). According to the different manufacturing processes, they can be divided into common box type (also known as inflatable cabinet or SF6 fully insulated cabinet) and modular type, such as: RM6 and SM6 (Schneider).
In recent years, SF6 ring network cabinets have developed very rapidly, and both manufacturing processes and product reliability have the potential to be on par with international electrical giants. At present, there are only a handful of domestic manufacturers that produce SF6 distribution level at the 40.5kV level. The others are all C-GIS of the first-level system, based on the first-level power system with large current and large capacity.
SF6 gas insulated ring main unit is a switchgear that uses low-pressure SF6 gas as insulation and arc extinguishing medium. It is an important switchgear for ring main unit power supply and terminal power supply. The SF6 gas insulated ring main unit developed by Timetric Electric is a new product developed in accordance with the "12kV Ring Main Unit (Box) Standardized Design and Customization Plan (2019 Edition)". Through standardized design, combined with our company's accumulation and precipitation in power distribution terminals, it has achieved a deep integration of primary and secondary, integrating high reliability, easy maintainability, modularization and safety.
Serial number | project | unit | Load switch unit | Combined electrical unit | Circuit breaker unit | ||
1 | Rated voltage | kV | twenty four | twenty four | twenty four | ||
2 | Rated frequency | Hz | 50 | 50 | 50 | ||
3 | Rated current | A | 630 | 125(depends on fuse current) | 630 | ||
4 | Rated | 1min | Phase, to ground | kV | 65 | 65 | 65 |
insulation | Power frequency withstand voltage | Fracture | kV | 79 | 79 | 79 | |
level | Control and auxiliary circuits | kV | 2 | 2 | 2 | ||
Lightning Rush | Phase, to ground | kV | 125 | 125 | 125 | ||
Shock withstand voltage | Fracture | kV | 145 | 145 | 145 | ||
5 | Rated short-time withstand current | kA/s | 20, 25/4 | —— | 20, 25/4 | ||
6 | Rated peak withstand current | k | 50, 63 | —— | 50, 63 | ||
7 | Rated short-circuit breaking current | k | —— | Limited by high voltage fuses | 20, 25 | ||
8 | Rated short-circuit making current | k | 50, 63 | Limited by high voltage fuses | 50, 63 | ||
9 | Rated transfer current | A | —— | 1400 | —— | ||
10 | Rated active load breaking current | A | 630 | —— | —— | ||
11 | Rated closed-loop breaking current | A | 630 | —— | —— | ||
12 | Rated operating sequence | / | —— | —— | O-0.3s-CO-180s-CO | ||
13 | Mechanical life | Load switch/circuit breaker | Second-rate | 5000 | 5000 | 10000 | |
Disconnector/earthing switch | Second-rate | 3000 | 3000 | 3000 | |||
14 | Loop resistance | μΩ | ≤150 | —— | ≤150 | ||
15 | Rated filling pressure (gauge pressure at 20℃) | MPa | 0.04 | ||||
16 | Annual relative gas leakage rate | Year | ≤0.01% | ||||
17 | Insulating gas | SF6 | |||||
18 | Protection level | Compartment (IP code) | / | IP2XC | |||
Gas box (IP code) | / | IP67 | |||||
Cabinet (IP code) | / | IP41 | |||||
Cabinet (IK code) | / | IK10 |
Timetric ElectricRUM Indoor High Voltage SF6 Gas Insulated Switchgear usage environment:
1.Ambient temperature: -40ºC~+45ºC;
2.Relative humidity: daily mean not over 95%, monthly mean not over 90%;
3.Altitude: not exceed 4000m;
4.The installation site should be free of fire, explosive danger, serious pollution, chemical corrosion or severe vibration.
Timetric ElectricRUM Indoor High Voltage SF6 Gas Insulated Switchgear include the following aspects:
1. Basic structure of sulfur hexafluoride gas insulated ring main unit
Sulfur hexafluoride gas insulated ring main unit (hereinafter referred to as SF6 ring main unit) consists of circuit breakers, disconnectors, grounding switches, CT (current transformer), PT (voltage transformer) and control devices, etc. It is mainly used in power transmission and transformation systems to provide high reliability and high availability distribution solutions. SF6 ring main unit uses environmentally friendly SF6 gas as the insulating medium, and has the advantages of small size, light weight and easy maintenance.
2. Advantages of sulfur hexafluoride gas insulated ring main unit
1. Safe and reliable: SF6 gas has good insulation performance and arc extinguishing ability, which can effectively prevent the occurrence of electrical faults.
2. Small size and light weight: SF6 gas has good insulation performance and arc extinguishing ability. Compared with traditional oil-immersed power equipment, SF6 ring main unit is small in size and light in weight, which can greatly save the floor space and construction cost of the distribution station.
3. Convenient maintenance: SF6 ring main unit adopts a detachable modular design, which is convenient and quick to maintain and replace, greatly saving maintenance costs.
Can your company customize products according to my requirements?
Yes, we can customize products according to customer requirements. Generally speaking, customers only need to provide: Circuit layout, voltage, current, etc.
What is your fastest delivery time?
Normally, we accept customer inquiries. After the switch cabinet technical parameters are connected, it takes 1-2 days to issue a price list and communicate with customers about the production and delivery time based on the actual situation.
How is your after-sales service?
We support a 1-year warranty. The normal quotation does not include on-site after-sales service. Free online communication and guidance are available.