Ab Switch
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| Specification | Details |
|---|---|
| Type | Outdoor, triple pole (3-phase), gang-operated Air Break (AB) Switch |
| Application | Used for isolating or switching high-voltage power lines and equipment under off-load conditions |
| System Voltage | 11 kV, 22 kV, or 33 kV (3-phase, 50 Hz, solidly earthed neutral system) |
| Rated Voltage | 12 kV for 11kV system; 24 kV for 22kV system; 36 kV for 33kV system |
| Operation | Manual operation through ground-level handle and GI pipe operating rod |
| Mounting | Horizontal / Vertical mounting on pole or substation structure |
| Insulation Type | Polymer / Porcelain post insulators (2 or 3 per phase) |
| Standard Compliance | IEC 62271-103, IS: 9920 (Part I to IV), IS: 2544 |
| Design Type | Tilting / Rotating gang-operated type with visible air gap |
| Specification | Typical Ratings |
|---|---|
| Rated Normal Current | 100A, 200A, 400A, 630A, 800A, or 1250A |
| Short Time Current (1 sec) | 10 kA – 16 kA (RMS) |
| Peak Withstand Current | 25 kA – 40 kA |
| Power Frequency Withstand Voltage (Dry/Wet) | 28 kV / 35 kV (for 11kV system) |
| Lightning Impulse Withstand Voltage (Peak) | 75 kV – 85 kV (for 11kV system) |
| Load Breaking Capacity | Off-load rated (Transformer magnetizing current: 6.3A; Line charging current: 2.5A) |
| Operating Mechanism | Smooth, simultaneous gang operation through operating rod system |
| Contact Resistance | ≤ 50 µΩ |
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