Emergency Protective Circuit Arrangements TRIZ Cases

See how a segmented cryogenic container isolates the refrigerating machine from the magnet fiel

Multiple MEMS sensors track vibration, pressure, sound, and load shifts to detect trapped children and block appliance operation.

Input-voltage monitoring and electric recycle valve actuation help gas compressors avoid surge, trips, and mechanical stress during dips.

Sets the failsafe node to the higher of supply or pad voltage to keep the output transistor off and prevent leakage during supply drops.

Sequence mutual coupling parameters Z21 and Z20 improve fault location on untransposed transmission lines despite phase imbalance.

A reverse polarity protection circuit redirects current away from the body diode to limit heating and protect a high-side switch chip.

Excess current sensing forces a hard short in faulty VRD powerstages, triggering upstream protection before smoking, burning, or flames.

A PCB-mounted fuse cuts overcurrent in a battery module, while a detachable transparent cover enables fast replacement and status checks.

A relay and solid-state handoff keeps AC power continuous during source transfer, avoiding break-before-make interruption and costlier switch designs.

Fault voltage and extrapolated pre-fault current signals enable accurate line impedance and earth fault location in non-rigidly grounded networks.

Charge current measurement diagnoses current breaker failure during cutoff commands while keeping vehicle loads powered and avoiding extra switch circuits.

Traveling-wave reflections at two busbar sensors let IEDs locate conductor faults accurately without high-precision time synchronization.

Stored capacitor energy keeps LED module connection monitoring active during power-off, protecting digital cinema copyrights from tampering.

Integrated OVP modules and PCBAs simplify hybrid fiber-power cable breakout in tight cellular sites while protecting remote radio feeds from surges.

Time-synchronized terminal signals enable 2-6 ms trip windows in travelling wave line protection, reducing harmonic-driven mal-trips.

Sensor-based trip prediction gives plant controllers time to shed load or start backup units before a unit trip disrupts grid frequency.

Sensors and FET control identify miswired dimmer terminals and correct connections to prevent failures, including with inductive loads.

An electric isolating drive combines breaker, fuse, and switch functions to simplify outdoor microgrid isolation and protection.

Independent monitoring of heater duty ratio and run time cuts power during MCU faults to prevent overheating and fire.

Digital logic validates complementary switch signals and holds the last valid state to block bounce, disconnect, and error propagation.

A soft-breaker power splitter shares one 240V outlet between an appliance and EV charger while sensing current to prevent overloads.

A relay or auxiliary loop disconnects the solar panel before battery removal, preventing charge controller damage during wiring changes.

When one FEM shorts to ground, this circuit isolates the failed path so the shared power source keeps other access point FEMs running.

When power oscillation appears, the controller shifts DC voltage near open-circuit level and triggers global MPPT to stabilize grid power quality.

Dynamic gate control responds to short-circuit overvoltage by adjusting charge carrier concentration to keep the power switch safe.

Edge-zone sensing on an automatic swing door detects fingers near the closing edge and reopens the leaf while limiting false triggers.

Time thresholds and reset counting force sleep under weak battery voltage, preventing repeated resets, code load errors, and drain.

Injecting an FMCW stator-voltage signal and cross-correlating current spectra exposes broken-bar signatures in noisy induction motor operation.

FMCW voltage injection and cross-correlation shift broken-bar signatures away from supply noise for continuous induction motor monitoring.

A parallel electronic switch tube absorbs relay voltage jumps and cuts reverse charging fast, preventing arc damage in vehicle emergency power supplies.

A coil senses short-circuit magnetic flux and its induced voltage enables low-cost power converter protection without large current sensors.

Smart switches isolate overcurrent and reconnect vehicle loads without fuse replacement, reducing downtime while maintaining backup power.

Three-phase differential and sequence-current variation analysis speeds converter transformer inter-turn fault detection despite second harmonic blocking.

Selective NVR disabling lets an inaccessible router housing switch work safely with a secondary switch after power interruptions.

Adaptive edge-based DGA alarms use rolling thresholds, rate-of-change, and acceleration flags to cut false positives in transformer fault detection.

Separate output-side capacitors and modular breaking units simplify multi-directional DC branch integration while reducing breaker size and cost.

PWM and sensed output current are cross-checked to detect sense resistor shorts and shut down a USB-PD converter before unsafe faults persist.

Uses existing converter signals and Goertzel-based ESR and capacitance estimation to detect DC link capacitor degradation without extra hardware.

Goertzel-based ESR and capacitance estimation from standard converter signals detects DC link capacitor degradation without extra hardware.

High-frequency switching injects current ripple onto the PV power bus, enabling duplex module monitoring without extra transceivers.

Remote BPU-TPU control switches RRH circuit breakers from the base, cutting tower-top manual work, cable weight, and power loss.

A centralized working power line replaces separate module converters, cutting wiring complexity, cost, and module size while maintaining reliable supply.

A compact enclosure integrates hybrid cable routing, overvoltage modules, and alarm PCBAs to protect remote radio links and simplify tower installation.

Using the shunt midpoint as gate-drive reference suppresses source overshoot while preserving accurate overcurrent detection in inverter switching.

Timed current interrupting devices isolate surge arrestor faults before lateral fuses trip, reducing outages and fuse damage in distribution transformers.

Two redundant control paths select active short-circuit or freewheeling by rotational speed to avoid voltage peaks, current surges, and unwanted deceleration.

Ranks multiple single-end traveling wave fault locations using reflections, timing, and impedance data to pinpoint the most credible fault.

A segmented fuse assembly and bus bar connector simplify fuse replacement in battery modules while preserving reliable electrical connections.

Pivotable multi-fuse assemblies switch coordinated fuses by power flow direction to prevent miscoordination and unnecessary load disconnection.

Nitrogen flow and oil level signals trigger valve actuators to isolate damaged transformer radiator sections before major oil loss.

Pre-set current control based on prior ride-through duration stabilizes grid-fault voltage and reduces converter oscillation.

Time-domain reflectometry tracks reflectogram shifts in superconducting lines to detect and localize accidental transitions before damage occurs.

Heterogeneous flux and Hall current sensors keep battery current monitoring stable and enable abnormal current protection when one sensor fails.

A configurable control chip lets PV shutoff devices match changing module connections by adjusting output voltage instead of replacing hardware.

Waveform refinement separates tap changer signals from winding reactive loss, enabling accurate current and arcing detection at high load.

Pre-accumulated switch current is reflected on slope voltage before turn-on, enabling stable current feedback at low output-input voltage ratios.

A controller tracks fuse current over time, calculates I2t thermal load, and shuts off the motor before overcurrent damages tool components.

External load sensing slows or blocks power tailgate opening to prevent damage when cargo pressure is applied in the closed state.

A low voltage cutoff circuit uses a transistor and resistor to automatically disconnect power from a battery.

Motor acts as generator during descent to recharge batteries, extending lifespan and reducing energy consumption.

A vibration sensing module detects impact signals from user-controlled surface contacts to execute device commands without direct touch.