SZL975/3 75A Three Position Three Phase Panel Mount Generator Changeover Rotary Cam Transfer Switch Overview This panelmount rotary cam transfer switch provides reliable three position source selection for three phase systems. Designed for generator changeover and manual source transfer, the SZL975/3 is compact, easy to install, and rated for heavy use in industrial and commercial settings. Key benefits Clear threeposition operation 102 for fast manual switching between main, off, and generator sources. Improves conversion and changeover efficiency by reducing downtime during source transitions. Robust electrical ratings suitable for typical three phase control panels and distribution equipment. Simple panel mounting and plastic construction reduce installation complexity and panel space requirements. Main specifications Model number: SZL975/3 Color: 75A three sections Material: Plastic Current rating: 75A (conventional heating current Ith 75A) Rated insulation voltage Ui: 690V Rated working voltage Ue: AC 660V Use category: AC23A Rated working current Ie: 3.2A Rated shortcircuit making capacity Icm: 74A Rated shorttime withstand current Icw: 52A for 1 second Hignconcerned Chemical: None Function and compatibility Manual three phase transfer switch for selecting between two power sources and an off position. Suitable for integration into control panels, switchboards, and generator changeover assemblies. Compatible with systems operating up to the rated voltages and currents listed above. Ensure system protective devices are sized according to local electrical codes. Practical applications Backup power transfer: Manual changeover between utility supply and standby generator for small commercial or light industrial premises. Equipment isolation and maintenance: Provide a safe, visible off position for servicing motors, pumps, and control circuits in production lines. Control panels and distribution boards: Use as a compact transfer solution in machinery control cabinets and distribution panels where clear manual source selection is required. Installation and usage notes Panel mounting design requires appropriate cutout and secure fastening. Follow standard electrical installation practices. Confirm system voltages and fault protection are compatible with the rated values before installation. Not intended to automatic transfer switches where unattended automatic transfer is required. This transfer switch delivers straightforward, durable manual source selection with clear ratings and simple panelmount installation for three phase systems.