Fully Sealed Ring Network Metal Switch Equipment
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Fully Sealed Ring Network Metal Switch Equipment
Frequency: 50Hz/60Hz
Rated short-time withstand current: 20/4 kA/s
Rated peak withstand current: 50kA (Customized)
Rated active load breaking current: 630A (Customized)
Rated closed-loop breaking current: 630A (Customized)
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of fully sealed ring network metal switch equipment in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced fully sealed ring network metal switch equipment from our factory. Also, quotation is available.
Product Overview
The fully insulated and fully enclosed ring main unit (SF6 gas insulated switchgear) adopts a modular design, allowing flexible combination of common box units and expansion units to meet the usage requirements of secondary substations.
All live parts and switches are enclosed in a stainless steel shell. The product features reliable operation, safety, compact structure, small footprint, maintenance-free operation and long service life. It is suitable for small secondary distribution stations, box-type switch stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, expressways, subways, tunnels and other places.
Product Features
Superior Design
Compact and space-efficient overall structure, reducing installation footprint while maintaining performance.
Reliable Performance
Stable and dependable power supply, supporting continuous operation of the power system and reducing outage risks.
User-Friendly
Straightforward installation for rapid deployment; flexible operation allows adjustments based on actual requirements.
Cost-Effective
Balances solid performance with ease of use, offering good value and benefits for users.
Type Designation
Specification
TRM6 Ring Main Technical Parameter Table
|
Item |
Unit |
Load Switch Unit |
Combined Unit |
Circuit-breaker Unit |
|||
|
Rated voltage |
kV |
12/24 |
12/24 |
12/24 |
|||
|
Rated frequency |
Hz |
50 |
50 |
50 |
|||
|
Rated frequency |
A |
630 |
50 (depending on fuse current) |
630 |
|||
|
Rated insulation level |
1 min Power frequency resistance pressure
Lightning impulse shock pressure resistance |
Phase-to-phase / Phase-to-earth |
kV |
42/65 |
42/65 |
42/65 |
|
|
Across contacts (Open contact gap) |
48/79 |
48/79 |
48/79 |
||||
|
Control and auxiliary circuits |
2/2 |
2/2 |
2/2 |
||||
|
Phase-to-phase / Phase-to-earth |
75/125 |
75/125 |
75/125 |
||||
|
Across contacts (Open contact gap) |
85/145 |
85/145 |
85/145 |
||||
|
Rated short-time withstand current |
kA/s |
20/4 |
/ |
20/4 |
|||
|
Rated peak withstand current |
kA |
50 |
/ |
50 |
|||
|
Rated short-circuit making current |
kA |
63 |
Limited by HV fuse |
63 |
|||
|
Rated short-circuit breaking current |
kA |
/ |
Limited by HV fuse |
20/20 |
|||
|
Rated transfer current |
A |
/ |
1700/1400 |
/ |
|||
|
Rated active load breaking current |
A |
630 |
/ |
/ |
|||
|
Rated closed-loop breaking current |
A |
630 |
/ |
630 |
|||
|
Mechanical life |
Load switch / CB |
Times |
10000 |
10000 |
20000 |
||
|
Disconnector / earthing switch |
3000 |
3000 |
3000 |
||||
|
Loop resistance |
μΩ |
≤150 |
≤400 |
≤150 |
|||
|
Rated gas pressure (gauge at 20℃) |
MPa |
0.04 |
0.04 |
0.04 |
|||
|
Annual relative gas leakage rate |
% |
≤0.01 |
≤0.01 |
≤0.01 |
|||
|
IP protection degree |
Enclosure |
IP41 |
IP41 |
IP4X |
|||
|
Gas tank |
IP67 |
IP67 |
IP67 |
||||
Normal operating conditions
- Ambient air temperature: Upper limit +40°℃, lower limit -40°℃
- Humidity: Average daily relative humidity not exceeding 95%
- Average monthly relative humidity not exceeding 90%
- Water vapor pressure: Average daily value not exceeding 2.2kPa
- Average monthly value not exceeding1.8kPa
- Altitude not exceeding 2000m
- The surrounding air is not significantly polluted by dust, smoke, corrosive, flammable gases, vapors, or salt-mist.
- The amplitude of electromagnetic interference induced in the secondary system does not exceed1.6kV.
Application
- Small secondary substations and switching stations: For urban distribution ring power supply, cable branching and terminal distribution.
- Industrial and mining enterprise distribution: For MV power distribution and load control in factories, mines and manufacturing parks.
- Urban residential district distribution: For power distribution in residential areas and urban distribution networks.
- Infrastructure: Suitable for places with high requirements for power continuity, such as airports, railways and tunnels.
- High-rise and commercial buildings: For power distribution systems in high-rise buildings and commercial complexes.
FAQ
Q: What are the main components of the TRM6 ring main unit?
A: It consists of a gas tank, operating mechanism, live parts and switching elements; the tank can be configured with load switch, combined (fuse-equipped) or circuit breaker units.
Q: Why is SF6 gas insulation used?
A: SF6 provides good insulation and arc-quenching performance; together with the sealed tank, it yields a smaller size and footprint, suitable for ring power supply and terminal distribution.
Q: What are the advantages of the fully sealed gas tank?
A: All live parts are enclosed in a stainless steel tank, protected from dust, moisture and other environmental impacts, offering reliable operation and essentially maintenance-free service.
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