Circuit-Breaking Switches For Excess Currents TRIZ Cases

MEMS switches and arc suppression cut HVAC fault response time, reduce arc-flash energy, and replace slower breakers and contactors.

Ribs formed inside rotor radial cooling ducts boost gas turbulence and surface area, improving winding heat removal in large dynamoelectric machines.

A U-shaped slot motor boosts magnetic closing force to keep circuit breaker secondary contacts closed and reduce chatter and welding.

A roughened contact area and surrounding groove direct solder flow, limiting side rise and improving joint reliability in low-voltage switch contacts.

A rotating contact spring uses electric repulsion to hold a temporary break position, preventing rebound and secondary switching-on in circuit breakers.

A fixed nozzle directs compressed cooling gas at the arcing contact to suppress arcs while steering hot gas away from main contacts.

A U-shaped current path and magnetic arc guidance help compact DC switches interrupt high and short-circuit currents without arc short circuits.

Opposed magnetic fields push arcs diagonally apart in adjacent interrupter chambers, reducing short-circuit risk and improving airflow for arc extinction.

An isolated activation circuit and stress-limiting stopper help a teeter-totter MEMS switch handle large voltage differences with longer life.

An asymmetrically anchored beam and mechanical stopper help a MEMS switch handle high voltage and current with lower hinge stress and arcing.

Integrated sensors and a microcontroller manage a teeter-totter MEMS switch to limit stress, prevent arcing, and extend high-voltage breaker life.

A plunger and microswitch indicator reveals self-cleared arc flash or cross-phase events, enabling timely inspection without interrupting load continuity.

Rough contact surfaces and groove-like depressions confine solder, reducing side rise and improving low-voltage switch joint reliability.

Sensor feedback reduces magnetic driving force during short circuits so contacts separate instead of rewelding, extending contactor electrical life.

Sensor feedback detects repulsion-driven contact separation and reduces magnetic drive to stop reclosure and welding under short circuits.

A current-driven magnetic member holds arcing contacts closed against separation forces, improving high-current breaking without a larger actuator.

A housing-integrated stopper limits contact bridge travel during short circuits to prevent rebound, re-contacting, and arc sticking.

A solid-state bypass path draws and absorbs arc current during contact opening, reducing switch wear and extending breaker life.

A transient commutation current injector shifts DC fault current to an electronic path, cutting arcing, power loss, and self-heating.

A guided movable bar and cam constrain rotation-center shift under fault current, improving contact separation speed and arc breaking.

Current sensing, trigger detection, and timer override open the contacts fast during high-current events to prevent welding and re-contacting.

Levitation and arcing between switch contacts redirect current to a pyrotechnic initiator for fast, permanent overcurrent disconnection.

A nested button and transmitting-member layout lets bistable relays be manually reset and tested without disrupting electrical switching control.

A decoupled hand lever and spring-loaded busbar let the breaker trip open even when overload arcs fuse contacts or block manual reset.

A single-enclosure cassette layout and shared controller simplify switching among three or four power sources while reducing footprint and equipment.

A conductive bar redirects breaker arcs away from the mechanical switch, while solid-state switches suppress arc current to extend switch life.

Arc chamber overpressure drives a plunger and trip lever for faster pole-by-pole opening without false trips or spring-aging issues.

Distinct bias feedback in a circuit breaker actuator shows manual or electric engagement and supports operation under low-voltage conditions.

Arc-generated overpressure triggers a per-pole plunger and trip lever, cutting false trips and avoiding spring-based calibration drift.

A single-enclosure cassette layout switches three or four power sources with electromagnetic actuation, cutting ATS footprint and wiring complexity.

Electromagnetic force rotates a trip shaft to release the latch plate, keeping contacts closed normally and opening fast under short-circuit current.

A resistor and signal generator simulate capacitor behavior, enabling accurate capacitive touch sensor testing without hard-to-make variable capacitors.

A portable motorized racking tool uses magnetic attachment to secure onto metal surfaces for remote electrical equipment operation.

Parallel surveillance unit measures voltage drops across electrical contacts to detect deteriorating conditions without disconnecting the protective device.