Protective Switches TRIZ Cases
- Recloser Pulse Testing With Symmetrical Fault Current Timing
Closing recloser contacts for one AC cycle at the voltage peak creates symmetrical fault current and cuts stress on distribution components.
- DC Relay Inner Contact Structure for Short-Circuit Arc Resistance
An inner contact portion and magnet assembly help a DC relay resist electrodynamic repulsion, limit contact bounce, and prevent arcing.
- Relay Contact Assembly Layout for DC Short-Circuit Arcing
Inner contact portions and magnetic short-circuit resistance help a compact DC relay limit repulsion, bounce, and arcing.
- Rotating Probe Screening for Current Transformer Winding Defects
A rotating probe measures voltage through the current transformer to catch winding distribution and wrap-around defects before final assembly.
- Dual-Switch Electrical Control for Fail-Safe Functional Disconnection
A second controllable switch enables fault-triggered power cutoff when the primary switch fails, improving functional member disconnection reliability.
- Single-Phase Self-Powered Recloser With Ultracapacitor Backup
Using current-transformer and inductive charging, this recloser avoids batteries, simplifies live installation, and improves surge resistance.
- Recloser Pulse Testing for Symmetrical One-Cycle Fault Current
Timed magnetic-actuator reclosing limits fault current to one cycle and closes at a voltage peak to cut asymmetrical stress.
- PoE Repeater Powering for Long-Range Remote Data Devices
A repeater converts received line power for a second link, extending remote device powering from about 100 m to over 1500 m.
- Switchgear Control Apparatus for Three-Phase Reactor Inrush Suppression
A switchgear control apparatus independently times contact closing to suppress inrush currents in three-phase reactors.