Solid insulation ring network cabinet

-  Product Overview

The DLSH series solid insulated ring main unit (core and ring main unit) is produced as a replacement for traditional SF6 gas-insulated ring main unit, featuring small size, comprehensive solutions, modularity, and serialization;               
The product adopts a three-phase split structure. The vacuum arc extinguishing chamber, conductors, and isolating switch of the primary main circuit are all sealed in epoxy resin, featuring strong insulation performance and high protection level;               
Addressing the difficulty of high partial discharge in complex structured epoxy resin insulation components, the DLSH type solid insulation core is carefully optimized in terms of the pole shape and internal structure. The vacuum arc extinguishing chamber is coated with high-quality liquid silicone rubber, the primary conductor surface is sandblasted and coated with a special adhesive to achieve high-strength bonding between different materials and epoxy resin. Meanwhile, APG pressure gel technology and strict and meticulous production processes are used to ensure high density of the sealed pole material, thorough degassing, no impurities or pores inside, and uniform electric field distribution with low partial discharge;               
The DLSH series solid insulated ring main unit also features complete primary solutions, strong adaptability, and high standardization. The upper isolation scheme meets the national grid's 12kV ring main unit standardized design and customization scheme. The lower isolation and combination electrical appliance schemes of the same series can meet the needs of most conventional expansion projects. Moreover, the upper and lower isolation and combination electrical appliance schemes have consistent cabinet size and can be used in any combination; combined with PT isolation units, lifting units, and metering units, it can achieve comprehensive coverage of the 12kV solid insulated ring main unit primary scheme;               
The basic dimensions of the DLSH series solid insulated ring main unit are 420 wide * 875 deep * 1700 high (national grid standardized dimensions), with a minimum cabinet width of 400mm.

-  Applicable Standards

Solid insulated ring main units involve many standards. Only directly referenced standards are listed here; indirectly referenced standards are not listed. Standards without version numbers indicate that the product refers to the latest valid version.               
● GB1984-2014《High Voltage AC Circuit Breakers》               
● GB1985-2014《High Voltage AC Isolating Switches and Earthing Switches》               
● GB3804《3.6~40.5kV High Voltage AC Load Switches》               
● GB3906《Rated Voltage 3.6kV~40.5kV AC Metal-Enclosed Switchgear and Controlgear》               
● GB16926《AC High Voltage Load Switch-Fuse Combination Electric Appliances》               
● GB/T11022-2011《High Voltage Switchgear and Controlgear Standard Common Technical Conditions》               
● DL 404《Indoor AC High Voltage Switchgear Ordering Technical Conditions》               
 

-  Environmental Requirements

The DLSH series solid insulated ring main unit, with its small size, high protection level, and complete primary scheme, has been widely used in cable line segmentation, connection, and tapping load applications in 12kV power systems, meeting the needs of various urban and rural grid distribution upgrades and small secondary substations, switchyards, ring main boxes, box-type substations, residential areas, industrial and mining enterprises, and large shopping malls.               
The basic environmental requirements for product use are as follows:

● Maximum temperature: +50℃;               
● Minimum temperature: -40℃;               
● Altitude: ≤5000m;               
● Daily average relative humidity: ≤95%;               
● Monthly average relative humidity: ≤90%;               
● Installation location: Indoor (or outdoor box-type structural shell meeting the protection level requirements);               
● Seismic resistance: 8 degrees;               
● No fire, explosion hazard, chemical corrosion, severe pollution, or severe vibration.               
If the product is used in areas above 3000m altitude, the ordering party should negotiate the factory conditions with the manufacturer, confirm the altitude correction factor, and request verification from the relevant factory inspection report; when the ambient temperature exceeds +50℃, the user should consider the impact on the rated current carrying capacity of the switchgear and take necessary measures to improve the ambient temperature.

-  Technical Parameters

DLSH-12V/630-25kA Solid Insulated Vacuum Circuit Breaker/DLSH-12V/630-25 Solid Insulated Vacuum Circuit Breaker Cabinet

 DLSH-12/C630-25kA solid insulation vacuum load switch/DLSH-12/C630-25kA solid insulation vacuum load switchgear

DLSH-12/125-31.5kA solid insulation load switch-fuse combination electrical appliance/DLSH-12/T125-31.5kA solid insulation load switch-fuse combination electrical appliance cabinet

-  Dimensions

Installation base diagram 

-  Operating instructions

● Energization:           
1. Hang the upper notch of the cable room door ① into the groove of the door interlock ②, pull down the lower door handle interlock ②, unlock the baffle plate of the grounding operation hole ④, and close the cable room door and mechanism room door;           
2. Press the trip button ⑥ to trip the circuit breaker (the circuit breaker trip indicator ⑩ shows trip), and the lower door interlock 12 locks the lower door;           
3. Insert the handle into the grounding switch operation hole ④ and rotate clockwise to trip the grounding switch (the grounding indicator ⑤ shows trip), and the lower door interlock ② locks the lower door;           
4. Insert the handle into the isolator operation hole 11 and rotate clockwise to close the isolator (the isolation indicator ⑩ shows close);           
5. Insert the operating handle into the energy storage operation hole ⑧ and rotate clockwise until energy storage is complete (the energy storage indicator ⑨ shows that energy storage is complete);  
6. Press the closing button ⑦ to close the circuit breaker (the circuit breaker indicator ⑩ shows closing);

● Power off:           
1. Press the tripping button ⑥ to trip the circuit breaker (the circuit breaker indicator ⑩ shows tripping);  
2. Insert the operating handle into the isolator operating hole 11, rotate counterclockwise, and trip the isolator (the isolation indicator  
⑤ shows tripping);  
3. Confirm that the lower end is not energized, insert the operating handle into the grounding switch operating hole ④, rotate counterclockwise, and close the grounding switch (the grounding indicator ⑤ shows closing);  
4. After the circuit breaker is energized, press the circuit breaker closing button ⑦ to close the circuit breaker (the circuit breaker closing indicator ⑩ shows closing); Release the cable room door interlock 12;  
5. The cable room door ① can be opened; (Before opening the lower door, confirm that the lower end of the cable is not energized); Note: If the switch is missing the corresponding components, the corresponding operation is omitted.

● Energization:           
1. The upper notch of the cable room door ① is hung in the slot of the door interlock ②, allowing the lower door to pull down the door interlock ②, release the cover plate of the grounding operation hole ④, and close the cable room door and the mechanism room door;  
2. Insert the handle into the grounding switch operating hole ④ and rotate clockwise to trip the grounding switch (the grounding indicator ⑤ shows tripping);  
3. Insert the handle into the isolator operating hole ⑧ and rotate clockwise to close the isolator switch (the isolation indicator ⑥ shows closing);  
4. Insert the operating handle into the energy storage operation hole ⑨ and rotate clockwise until energy storage is complete (the energy storage indicator 11 shows that energy storage is complete);  
5. Press the closing button, the circuit breaker closes (the circuit breaker indicator ⑦ shows closing);

● Power off:           
1. Press the tripping button ③ to trip the circuit breaker (the circuit breaker indicator ⑦ shows tripping);  
2. Insert the operating handle into the isolator operating hole, rotate counterclockwise, and trip the isolator (the isolation indicator  
⑥ shows tripping);  
3. Confirm that the lower end is not energized, insert the operating handle into the grounding switch operating hole ④, rotate counterclockwise, and close the grounding switch (the grounding indicator ⑤ shows closing), and release the cable room door interlock ②;  
4. The cable room door ① can be opened; (Before opening the lower door, confirm that the lower end of the cable is not energized); Note: If the switch is missing the corresponding components, the corresponding operation is omitted