JXW-12 / JXW-24 / JXW-40.5
Outdoor ring main unit for 12kV, 24kV, and 40.5kV loop networks with SF6 fully sealed or HXGN air-insulated configurations.
Quick Specifications
Rated Voltage
12kV / 24kV / 40.5kV
Cabinet Type
Outdoor ring main unit
Switchgear Options
EWR SF6 sealed / HXGN air insulated
Application
Parks, airports, buildings, streets
Product Overview
Our company can produce outdoor ring main units with a voltage class range of 0-40.5kV. This product is an inflatable outdoor ring main unit developed and produced with advanced professional technology and designed to meet international professional standards.
The outer shell of the outdoor ring main unit is designed according to outdoor structural requirements. The enclosure can be manufactured with stainless steel plate, SMC, or GRC according to the customer's requirements, and the surface can be treated with plastic spraying to provide sufficient mechanical strength.
There are no removable fasteners exposed on the surface of the enclosure, which improves anti-theft performance. The top cover adopts a double-layer structure with an air interlayer and a ventilation opening, so the product has good natural convection, thermal insulation, and heat dissipation performance.
It is equipped with a rainproof door lock, and a limit hook is provided when the door is opened for easier fixing. The box body is equipped with a sealed bottom plate at the cable inlet and outlet, preventing small animals and moisture from entering the enclosure.
The appearance and color of the outdoor ring main unit can be customized according to the user's needs so that the final product remains coordinated with the surrounding environment.
The outdoor ring main unit can adopt the EWR series SF6 fully sealed and fully insulated ring main switchgear, or the HXGN series air-insulated switchgear. When the EWR series is used, it offers modularization, expandability, full insulation, full sealing, safety, reliability, and maintenance-free operation. When the HXGN series is used, it provides the same safety, adaptability, and expandability while offering easier equipment maintenance.
It is widely used in industrial parks, residential areas, streets, airports, all kinds of buildings, bustling commercial centers, and other outdoor distribution locations.
Product Characteristics
High safety
All live parts are enclosed in the SF6 gas tank, achieving full sealing and full insulation.
It is equipped with a mechanical interlock that meets the "five prevention" requirements, eliminating misoperation.
The incoming and outgoing cables adopt a fully insulated, fully sealed, and touchable connection method to maximize personnel safety.
The box body is equipped with a gas pressure monitoring device for real-time monitoring of gas pressure during operation. An explosion-proof and pressure relief device is arranged at the lower rear of the gas tank, and the unit has passed the internal combustion arc test by an authoritative institution.
Flexible solution
Incoming and outgoing line methods are flexible. Left-side, right-side, and bottom incoming and outgoing lines can all be realized.
The combination method is flexible. Any combination can be achieved between units with unrestricted expansion.
A built-in busbar expansion method is adopted to meet usability, economy, and appearance requirements, and the design scheme can be adjusted to suit site conditions.
Compact and reasonable structure
The dimensions of all unit modules are the same, except for the metering module.
The compact dimensions do not reduce construction convenience and help keep the installation footprint under control.
Economy
The unit is maintenance-free, occupies a small area, offers strong cost performance, and has a service life exceeding 30 years.
Widely applicable
The stainless steel plate of the gas tank part is fully automatically sealed and welded by robot TIG welding, and the protection level reaches IP67.
It can be installed in wet, dusty, salty, mining, and air-polluted places without special preventive measures.
Intelligent
It can be provided with supporting electric operation devices and distribution automation terminal equipment to realize intelligent switchgear with remote sensing, remote control, remote signaling, and remote adjustment functions.
This helps meet the smart-grid requirements for outdoor loop network equipment.
Enforce Standards
- GB 1984-2003: High voltage AC circuit breaker
- GB 1985-2005: High voltage AC isolation switch and ground switch
- GB 3804-2004: 3.6kV to 40.5kV high voltage AC load switch
- IEC 60265: High-voltage switches
- GB 16926-2009: AC high voltage load switch fuse combination
- IEC 420: High-voltage alternating current switch-fuse combinations
- GB 3906-2006: 3.6kV to 40.5kV AC metal enclosed switchgear and control equipment
- IEC 62271: High-voltage switchgear and controlgear
- GB/T 11022-2011: Common technical requirements for high voltage switchgear and control equipment
- IEC 60694: Common specifications for high-voltage switchgear and controlgear standards
- GB/T 11023: High pressure switchgear sulfur hexafluoride gas seal test method
- GB 4208-2008: Enclosure protection class
- IEC 60529: Degrees of protection provided by enclosures (IP Code)
- DL/T 404: 3.6kV to 40.5kV AC metal enclosed switchgear and control equipment
- DL/T 728-2000: Technical Guide for ordering gas insulated metal enclosed switchgear
Performance Parameter
| No. | Item | Sub Item | Unit | 630A | 1250A |
|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 12 | 12 | |
| 2 | Rated current | A | 630 | 1250 | |
| 3 | Rated frequency | Hz | 50 | 50 | |
| 4 | Rated insulation level | 1min power frequency withstand voltage - Dry test | kV | 42/48 (fracture) | 42/48 (fracture) |
| 4 | Rated insulation level | 1min power frequency withstand voltage - Wet test | kV | 34 | 34 |
| 4 | Rated insulation level | Secondary loop to ground | kV | 2 | 2 |
| 4 | Rated insulation level | Lightning impulse withstand voltage (peak) | kV | 75/85 (fracture) | 75/85 (fracture) |
| 5 | Rated short circuit closing current (peak) | kA | 50 | 63 | |
| 6 | Rated short-time withstand current | kA | 20 | 25 | |
| 7 | Rated peak withstand current | kA | 50 | 63 | |
| 8 | Rated short circuit breaking current breaking times | time | 30 | 30 | |
| 9 | Rated short circuit duration | s | 4 | 4 | |
| 10 | Rated operating voltage and rated voltage of auxiliary circuit | V | DC220, AC220, AC/DC220 | DC220, AC220, AC/DC220 | |
| 11 | Rated operating sequence | Minute -0.3s-combined minute-180s-combined minute | Minute -0.3s-combined minute-180s-combined minute | ||
| 12 | Overcurrent tripping rated current | A | 5 | 5 | |
| 13 | Mechanical life | time | 10000 | 10000 | |
| 14 | Allowable wear accumulation thickness of static and static contacts | mm | 3 | 3 | |
| 15 | Overcurrent rated current of the trip device | A | 5 | 5 | |
| 16 | Current ratio of current transformer | 200/5, 400/5, 600/5 | 200/5, 400/5, 600/5 | ||
| 17 | Contact opening distance | mm | 9±1 | 9±1 | |
| 18 | Contact overreach | mm | 2±0.5 | 2±0.5 | |
| 19 | Average opening speed | m/s | 1.2±0.3 | 1.2±0.3 | |
| 20 | Average closing speed | m/s | 0.6±0.2 | 0.6±0.2 | |
| 21 | Opening time | ms | 20~40 | 20~40 | |
| 22 | Closing time | ms | 30~60 | 30~60 | |
| 23 | Closing bounce time | ms | ≤2 | ≤2 | |
| 24 | Tripole combination and switching are different | ≤2 | ≤2 | ||
| 25 | Phase loop DC resistance | μΩ | ≤80 (with isolation ≤150) | ≤80 (with isolation ≤150) |
Related Models in Ring Main Units
Back to Ring Main Units or contact us for datasheets and quotations.