KYN28A-12 Metal-Clad Withdrawable Switchgear
Armoured withdrawable AC metal-enclosed switchgear for 3.6–12 kV networks — up to 3150 A and 50 kA, IP4X bolted enclosure, accepting VD4/VS1/VH1/VK/ZN28 breakers, with full anti-misoperation interlocking.
- Fully bolt-assembled enclosure of high mechanical strength; plastic-sprayed doors resist impact and corrosion;
- Accepts ABB VD4 vacuum breakers, C3 fixed load switches and domestic VS1 / VH1 / VK / ZN28 breakers in place o
- Air clearance of bare conductors > 125 mm, composite insulation distance > 60 mm regardless of breaker type
- Replaces legacy KYN1-12, JYN2-12 and similar switchgear; long life, low maintenance, compact build
A cleaner, more reliable approach to MV switching
The HP-ELS series replaces SF₆ with environmentally friendly insulating media while keeping the proven safety and performance utilities expect from gas-insulated switchgear.
Product Overview
KYN28-12 armored removable AC metal-enclosed switchgear is a new product independently designed and developed by absorbing advanced domestic and overseas manufacturing technologies; it replaces older metal-enclosed switchgear such as KYN1-12 and JYN2-12. The enclosure is fully bolt-assembled for high mechanical strength and a neat appearance; cabinet doors are plastic-sprayed for impact and corrosion resistance, reaching IP4X protection (iron plate available on request).
Breaker Options & Insulation
The switchgear accepts ABB VD4 vacuum circuit breakers and C3 fixed load switches, as well as domestic VS1, VH1, VK and ZN28 vacuum breakers in place of imported equivalents. Whichever breaker is fitted, the bare-conductor air-insulation distance exceeds 125 mm and the composite-insulation distance exceeds 60 mm; all fitted breakers offer long life, low maintenance and a compact structure.
Technical specifications
Headline ratings at a glance, followed by the full technical data sheet. Exact values are confirmed per project configuration.
| Parameter | Value |
|---|---|
| Rated voltage | 3 / 6 / 7.2 / 12 kV |
| Rated frequency | 50 Hz |
| Rated current (breaker & switchgear) | 630–3150 A |
| Short-time withstand current (4 s) | 16–50 kA |
| Peak withstand / making current | 40–125 kA |
| Short-circuit breaking current | 16–50 kA |
| 1 min PF withstand / impulse | 42 kV / 75 kV |
| Protection degree | IP4X (IP2X with door open) |
| Height | 2300(2200) |
| Width ≤1250 A / ≥1600 A | 800 / 1000 |
| Depth cable / overhead lines | 1500 / 1660 |
Reading the model designation
Generated automatically from each product's model code.
Overall dimensions
Cabinet height, width and depth options. Selection depends on cable type and incoming / outgoing configuration.
| Item | Dimensions (mm) | Scope of application |
|---|---|---|
| Width A | 800 / 1000 | Rated ≤1250A / ≥1600A |
| Height B | 2300 (2200) | Cabinet (mm) |
| Depth C | 1500 | Cable in/out (mm) |
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