3 pole manual changeover switch with open type Kit Kat

A 3-pole manual changeover switch with open-type Kit Kat fuses is an electrical switching device designed to manually transfer power supply from one source to another—commonly between main (public utility) and generator power.

Specifications

• <p><strong>Electrical Ratings</strong></p><p>• <strong>Poles:</strong> 3-pole (L1, L2, L3)</p><p>• <strong>Rated Voltage:</strong> 415V AC (3-phase)</p><p>• <strong>Rated Frequency:</strong> 50/60 Hz</p><p>• <strong>Rated Current Options:</strong> 32A, 63A, 100A, 200A, 250A, 400A (varies by model)</p><p>• <strong>Breaking Capacity:</strong> Based on installed Kit Kat fuse rating (typically 16kA to 20kA)</p><p><br></p><p><strong>2. Construction</strong></p><p>• <strong>Design:</strong> Open-type (fuse carriers and terminals exposed for inspection)</p><p>• <strong>Base Material:</strong> Porcelain or high-temperature phenolic resin (heat-resistant)</p><p>• <strong>Fuse Carrier Material:</strong> Ceramic/porcelain with copper or brass contacts</p><p>• <strong>Switch Mechanism:</strong> Heavy-duty mechanical lever for manual operation</p><p>• <strong>Enclosure:</strong> Usually supplied without enclosure (installer adds metal box if needed)</p><p><br></p><p><strong>3. Fuse System (Kit Kat Fuse)</strong></p><p>• <strong>Fuse Type:</strong> Rewirable or cartridge open-type</p><p>• <strong>Fuse Carrier:</strong> Porcelain with reinforced terminals</p><p>• <strong>Fuse Wire Rating:</strong> Based on load (commonly 30A, 60A, 100A, 200A, etc.)</p><p>• <strong>Protection:</strong> Overload and short-circuit protection</p><p><br></p><p><strong>4. Terminals &amp; Conductors</strong></p><p>• <strong>Terminal Material:</strong> Copper or brass for efficient conductivity</p><p>• <strong>Conductor Compatibility:</strong> Aluminium and copper cables</p><p>• <strong>Cable Size Range:</strong> Matches current rating (e.g., 10–35 mm² for 63A; 35–95 mm² for 200A)</p><p><br></p><p><strong>5. Switching Performance</strong></p><p>• <strong>Operation Type:</strong> Manual changeover</p><p>• <strong>Position Settings:</strong></p><p>• <strong>Main (I)</strong></p><p>• <strong>Off (0)</strong></p><p>• <strong>Generator (II)</strong></p><p>• <strong>Simultaneous Switching:</strong> All poles switch together to prevent phase imbalance</p><p>• <strong>Mechanical Endurance:</strong> Typically &gt;10,000 switching operations</p><p><br></p><p><strong>6. Safety &amp; Compliance</strong></p><p>• <strong>Short-Circuit Protection:</strong> Provided through Kit Kat fuses</p><p>• <strong>Insulation:</strong> Heat-resistant porcelain parts</p><p>• <strong>Standards:</strong> Conforms to IEC 60947-3 for switch disconnectors</p><p>• <strong>Temperature Resistance:</strong> Suitable for high-heat electrical environments</p><p><br></p><p><strong>7. Installation Features</strong></p><p>• <strong>Mounting:</strong> Surface mounting on panel or flat board</p><p>• <strong>Cable Entry:</strong> Side or bottom depending on installation</p><p>• <strong>Easy Fuse Access:</strong> Open-type design enables fast fuse inspection and replacement</p><p>• <strong>Clearly marked terminals</strong> for incoming and outgoing supply</p>