HV Switchgear
KYN28A-12 AC Metal-enclosed Withdrawable Switchgear
12kV indoor withdrawable switchgear for power distribution and motor control, type-tested to IEC 62271-200.
KYN28A-12 is an indoor AC metal-enclosed withdrawable switchgear for 12kV three-phase systems. It uses vacuum circuit breakers on a withdrawable truck, with reliable interlocking and a compartmentalized, IP4X-protected structure. Suitable for substations, industrial plants and commercial buildings.
Key Technical Parameters
| Rated voltage | 12 kV |
|---|---|
| Rated frequency | 50 Hz |
| Rated current (busbar) | 1250 / 1600 / 2000 / 2500 / 3150 A |
| Rated current (feeder) | 630 / 1250 / 1600 / 2000 / 2500 / 3150 A |
| Rated short-time withstand current | 25 / 31.5 kA (4s) |
| Rated peak withstand current | 63 / 80 kA |
| Breaking capacity | 25 / 31.5 kA |
| Protection degree | IP4X (compartment), IP2X (open) |
| Standards | GB/T 3906-2020, IEC 62271-200, GB/T 11022-2020 |
Structure & Features
- Compartmentalized: busbar, circuit-breaker, cable and low-voltage compartments are separated.
- Withdrawable vacuum circuit-breaker truck with test / disconnect / service positions.
- Mechanical interlocks prevent incorrect operation between the truck and the grounding switch.
- Optional integrated protection & control relay panel.
Application Scenarios
- Indoor 12kV substations of industrial plants, data centers and commercial buildings.
- Incoming / outgoing feeder and motor-control applications.
Model Designation & Variants
- KYN = metal-enclosed withdrawable; 28A = design series; 12 = rated voltage 12kV.
Related / Alternative Models
| Related model | Relationship |
|---|---|
| KYN61-40.5 | 35kV counterpart for higher voltage networks |
| XGN15-12 | Compact SF6 RMU alternative where space is limited |
Selection Q&A
- What is the difference between KYN28A-12 and a fixed-type switchgear?
- KYN28A-12 uses a withdrawable circuit-breaker truck, allowing safe withdrawal for maintenance without full de-energization of the whole switchboard; fixed-type units require the breaker to be wired in place.