Scope of application:
DFWK-12 series outdoor ring-network cabinet is a kind of DFWK-12 series outdoor ring-network cabinet developed and produced by the company using foreign technology according to the characteristics of regional distribution network in China and the actual situation of urban distribution network cable transformation. The DFWK-12 series outdoor ring-network cabinet uses HRM16-12/24 series SF6 fully sealed and fully insulated ring-network switchgear. The switchgear has the advantages of modularization, scalability, full insulation, full sealing, safety and reliability, and maintenance-free, and is applicable to any harsh environment, It is widely used in industrial parks, residential areas, streets, airports, various buildings, bustling business centers and other places. DFWK-12 series outdoor ring-network cabinets have standard voltage levels of 12KV and 24KV, which can expand the distribution automation function, realize the intellectualization of ring-network cabinets, and make the power grid stronger and smarter.
Working conditions
◆ Ambient temperature: high temperature+50 ℃, low temperature - 40 ℃, daily average high temperature not more than 35 ℃;
◆ Relative humidity: daily average value shall not exceed 95%, and monthly average value shall not exceed 90%;
◆ Wind speed: no more than 35m/s;
◆ Pollution level: Class III;
◆ Seismic intensity: 8 degrees;
◆ Ground inclination: no more than 3 degrees;
◆ Installation site: it is installed in a place without fire, explosion or severe vibration, good ventilation and corrosive gas.
Other conditions
◆ When the equipment is installed at an altitude of more than 1000 meters, special notes should be made so that the company can adjust the SF6 pressure during manufacturing.
◆ If adverse conditions are involved, please consult the company.
Product features
High security
The live part is enclosed in SF6 gas box to achieve full sealing and insulation; Mechanical interlocking meeting the five-prevention requirements shall be provided to prevent misoperation; The incoming and outgoing cables are fully insulated, fully sealed and touchable, and the upper limit ensures personal safety; Air pressure monitoring device is installed on the box to realize real-time monitoring of air pressure during operation; Explosion-proof pressure relief device is set at the rear and lower part of the gas box, which has passed the internal combustion arc test of the authority.
Flexible scheme
The incoming and outgoing lines are flexible, which can realize left, right and lower incoming (outgoing) lines; The combination mode is flexible. Any combination can be realized between cells, and unlimited expansion can be achieved; Built-in bus expansion mode is adopted to fully meet the requirements of usability, economy and aesthetics; The design scheme is flexible and can meet the user's on-site requirements.
Compact and reasonable structure
The size of the unit module is consistent (except for the metering module), and the compact size does not affect the convenience of construction.
Economy
Maintenance-free; Small footprint, high cost performance.
Widely used
The stainless steel plate of the gas box is fully automatic TIG seal welded by the robot, and the protection grade reaches IP67. It can be installed in wet, dusty, salt polluted, mine and any air polluted place without special preventive measures.
Intelligence
It can provide electric operation device and distribution automation terminal equipment to realize intelligent switch equipment with "four remotes" function and meet the requirements of smart grid for such equipment.
Product reference standard
GB1984-2003 High Voltage AC Circuit Breaker
GB1985-2005 High-voltage AC disconnectors and earthing switches
GB3804-20043.6KV~40.5KV high-voltage AC load switch (IEC60265)
GB16926-2009 AC high-voltage load switch fuse combination apparatus (IEC 60420)
GB3906-2006306KV~40.5kV AC metal-enclosed switchgear and controlgear (IEC 62271)
GB/T11022-2011 Common technical requirements for high-voltage switchgear and controlgear standards (IEC 60694)
GB/T11023 Test method for sulfur hexafluoride gas tightness of high-voltage switchgear
GB4208-2008 Degrees of Protection Provided by Enclosures (IEC60529)
DL/T4043.6KV~40.5KV AC metal-enclosed switchgear and control equipment
DL/T728-2000 Technical Guidelines for Ordering Gas Insulated Metal-enclosed Switchgear
Q/CSG10012 Technical Guidelines for Urban Distribution Network of China Southern Power Grid
State Grid Corporation of China Material Procurement Standard - 12KV, 24KV Ring Main Unit General Technical Specification Product Reference Standard
Main accessories
The outer shell of the outdoor ring-network cabinet is designed according to the outdoor structure. The material of the box can be stainless steel plate, SMC or GRC according to the customer's requirements. The surface is sprayed with plastic and has sufficient mechanical strength;
There are no fasteners on the surface of the box to be removed, and the anti-theft property is good. The top cover is a sandwich double-layer structure with air, and it is equipped with air vents, natural convection ventilation, heat insulation and heat dissipation are good;
Rain-proof door lock. When the door is opened, the limited pull hook makes the door easy to fix. The box is equipped with a sealed bottom plate for cable inlet and outlet to prevent small animals and moisture from entering the box;
The appearance and color of the box can be customized according to the needs of users, with beautiful appearance and coordination with the surrounding environment.
Switch unit
The switch unit adopted by DFWK series outdoor ring-network cabinet is the HRM16 series fully sealed and fully insulated ring-network switchgear produced by our company, which has the advantages of modularization, unrestricted free expansion, compact structure, small size, maintenance-free, etc. Each functional unit and function description
Unit C: load switch unit, mainly used for connection, branching, breaking and control of incoming and outgoing cables of 12KV and 24KV distribution networks;
Unit F: load switch+fuse combined electrical unit, which is used for control and protection of terminal distribution transformers with 12KV and 24KV distribution network capacity of 1250KVA and below. Control and protection of power distribution transformer.
V unit: vacuum circuit breaker unit, which can be used not only for the connection, branching, sectioning, control and protection of incoming and outgoing lines of 12KV and 24KV distribution network cable lines, but also for the larger capacity of the unit equipped with microcomputer-based relay protection device, which can realize the functions of overcurrent protection.
Unit D: cable incoming cabinet without switch, used for connection of incoming and outgoing cables, and the incoming and outgoing cables are directly connected with the bus.
SV unit: bus coupler cabinet, used for the connection between section buses.
M unit: metering cabinet, used for electric energy metering, can be conveniently combined with any other cabinet.
PT unit: voltage transformer cabinet, used to install PT, automatic terminal device and backup power supply.
Ordering instructions
◇ Product model and primary drawing can be provided if users have special requirements;
◇ Standard section of incoming and outgoing lines and branch cables;
◇ Quantity of lightning arrester and short circuit fault indicator;
◇ Material and color of shell.
