Extended Shaft Kinematics: The defining feature of the F10-8III is its lengthened steel square drive shaft. This design allows the component to be recessed further into low-voltage cubicles, providing ample clearance for specialized mechanical linkage bars while maintaining zero torsional play.
8-Channel Matrix Partitioning: Houses 4NO and 4NC silver-alloy contact tracks within a ruggedized modular frame. Each separate stage is isolated by deep tracking-resistant polymer walls, eliminating risks of cross-phase short circuits during intense inductive breaking operations.
Positive State Synchronization: The mechanical connection utilizes a direct-drive rotary mechanism paired with a visible green indexing notch. This configuration guarantees simultaneous contact transition across all 8 poles, eliminating signal delay in protection relays.
Vibration-Resistant Terminals: Outfitted with stiff male spade terminals that endure continuous physical shock from breaker spring-charging mechanisms without terminal fatigue or wiring harness detachment.
The F10-8III contact block is specifically specified for high-density, deeper-frame secondary wiring systems:
Long-distance mechanical signal feedback for withdrawable or fixed-type vacuum circuit breakers (VCBs).
Multi-circuit interlocking logic combinations linking disconnectors, earthing switches, and spring operating mechanisms.
Custom local/remote status indication paths inside non-standard or retrofitted power distribution panels.
| Parameter | Specification |
| Model Designation | F10-8III (Extended Shaft Type) |
| Contact Array | 4 Normally Open + 4 Normally Closed (4NO+4NC) |
| Total Interlocking Poles | 8 Stages |
| Shaft Profile | Extended square steel shaft with green alignment rotor |
| Conventional Thermal Current (Ith) | 10A |
| Termination Method | Heavy-duty male fast-on spade tabs |
Auxiliary Switch Dimensional Drawing
