1. Structural type
Fixed structure, SF6 gas insulation, small size, compact structure
Modular design, suitable for ring main power supply system
No circuit breaker trolley, generally use load switch or combination electrical appliances
KYN28A-12 (metal armored removable switch cabinet)
Metal armor + removable (trolley type) structure
Central design, circuit breaker can be withdrawn for easy maintenance
Air insulation + metal partition, high protection level (IP4X)
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2. Main uses
HXGN-12
Applicable to ring network power supply system and terminal power distribution
Mainly used for load switching, with low short-circuit protection capability (usually 20kA)
Commonly used in distribution rooms, box transformers, and switchgear
KYN28A-12
Applicable to substations, distribution centers, and large industrial and mining enterprises
With complete protection functions (relay protection, automatic reclosing, etc.)
Strong short-circuit breaking capability (usually 31.5kA~50kA)
3. Main switch components
HXGN-12
Usually uses SF6 load switch or load switch + fuse combination appliance
Suitable for frequent operation, but short-circuit protection relies on fuse
KYN28A-12
Uses vacuum circuit breaker (handcart type), can be operated frequently
With relay protection function (overcurrent, quick break, grounding protection, etc.)
4. Insulation method
HXGN-12
SF6 gas insulation, small size, not affected by the environment
Suitable for places with limited space
KYN28A-12
Air insulation + metal partition, need to maintain a dry environment
Large size, but easy to maintain
5. Scalability and flexibility
HXGN-12
Modular expansion, can add PT cabinets, metering cabinets, etc.
Applicable to small power distribution systems
KYN28A-12
Strong scalability, can configure a variety of protection schemes
Applicable to large power distribution systems
6. Cost and maintenance
HXGN-12
Low cost, suitable for projects with limited budget
Easy to maintain, but SF6 gas needs to be tested regularly
KYN28A-12
Higher cost, but perfect protection function
Easy to maintain (circuit breaker can be withdrawn for maintenance)
Summary
| Comparison items | HXGN-12 (SF6 ring main unit) | KYN28A-12 (metal armored removable type) |
|---|---|---|
| Structure | Fixed, SF6 gas insulation | Cart type, air insulation + metal armor |
| Purpose | Ring network power supply, terminal distribution | Substation, large power distribution system |
| Switch type | Load switch + fuse | Vacuum circuit breaker |
| Short circuit breaking capacity | Low (20kA) | Higher (31.5kA~50kA) |
| Protection level | IP3X (cabinet IP4X) | IP4X |
| Volume | Compact | Larger |
| Cost | Low | Higher |
Selection suggestions:
HXGN-12: Suitable for small power distribution, ring network power supply, and space-constrained occasions
KYN28A-12: Suitable for large power distribution and occasions requiring high protection level
If you need further consultation or customization of HXGN-12 high-voltage ring main unit (SF6) or KYN28A-12 switchgear, please feel free to contact us!
📧 Email: pannie@hdswitchgear.com.
📞 Phone: +8618789455087
