Emergency Protection Detection TRIZ Cases
- DC Solid-State Circuit Breaker Resetting for Fast Fault Isolation
A PWM-controlled DC solid-state breaker isolates faults in about 100 μs and supports remote reset to avoid arcing, wear, and excess energy transfer.
- Impedance Monitoring for Touch Current Shutdown in Ungrounded Power
Complex conductor-to-earth impedance monitoring calculates touch current and disconnects ungrounded power when body current risk exceeds a threshold.
- Solid-State Circuit Interlocking for Breaker Failure Isolation
When a solid-state switch fails short, an upstream breaker cuts current so downstream mechanical contacts can open safely and reliably.
- USB-C Port Protection Circuit for Dual-Role Voltage Faults
A voltage-sense detection circuit identifies USB-C dual-role port transistor faults and blocks damaging 20V from reaching external devices.
- Timed Power Isolation Circuit for Radiation Transient Protection
A transient detector and timer cut regulated power and discharge stored energy during radiation events to protect downstream electronics.
- Active Fuse Control Circuit for Sleep-Mode Short-Circuit Detection
Constantly powered detect and process circuits let a battery pack active fuse trip within 3 ms, even when the BMS is in sleep mode.
- Solid-State Circuit Breaker Layout for Ultrafast DC Fault Isolation
Capacitor-inductor placement around an SSCB enables ultrafast DC fault detection and isolation by sensing inductor voltage rise.
- Series Current Transformer Sensing for Distribution Grid Fault Detection
Three series-connected current transformers derive sum and phase currents for non-intrusive distribution grid fault detection.
- GaN Current Flowback Prevention for Short-Circuit Protection
A GaN switch with current sensing and latch control blocks reverse current in microseconds, protecting DC bus electronics from short circuits.
- Protective device with multi-channel line current differential protection
Independent communication channels and internal voting improve line current differential protection against data corruption and single event upsets.
- Transformer Switching Angle Selection for Low Inrush Current
Iterative breaker closing at different phase angles cuts transformer inrush current without remanent flux estimation or site-specific simulation.
- Vacuum Interrupter Reclosing Timing for CT Saturation Mitigation
Point-on-wave polarity detection times vacuum interrupter reclosing to harvest more CT energy despite saturation and clear faults faster.
- Transformer Differential Protection for Inrush-Secure Fast Fault Detection
Enhanced restraining and current compensation separate inrush from real transformer faults for quarter-cycle detection and higher sensitivity.
- USB-C Power Port Liquid Detection Before High-Voltage Output
Impedance sensing on USB-C pins blocks high-voltage output when liquid or debris is present, helping prevent pin corrosion and fire risk.
- Distributed MTTM Transfer Relay Control Without Central Failure Points
Protection relays coordinate MTTM breaker transfer locally to remove central controller failure points and restore power automatically.
- Cable Network Power Unit for Fast Surge Protector Reset
Abrupt current-change detection triggers DC polarity reversal to reset cable-network surge protectors in 1-5 ms and cut outage time.
- Cross-Domain Glitch Detection Circuit for Multi-Voltage Chip Security
A ratioed inverter and supply glitch detector translate glitch alerts across voltage domains, enabling resets or secure logic shutdown.
- Electrical Panel Relay Control for Grid and Auxiliary Power Switching
Integrated main and auxiliary relays manage load-or-source switching to prevent panel trips and maintain power during grid changes.
- Network Protector Harmonic Detection for Reverse Power Faults
Harmonic and transient analysis helps a network protector distinguish real faults from normal reverse power flow, reducing needless disconnections.
- Vehicle Antenna Detection Circuit With Two-Stage Hysteresis Sensing
Two-stage comparison and hysteresis sensing improve vehicle antenna in-position detection accuracy while reducing incorrect status judgments.
- SSCB Gate Driver Resistance Switching for Fast Fault Turn-Off
A lookup-table gate driver switches turn-off resistance by current and temperature to balance SSCB fault interruption speed and over-voltage.
- Switchable Gate Bias Clamp Circuit for Faster Reliability Testing
Switchable clamp voltage paths protect gate oxide in normal use while raising gate bias during reliability acceleration tests to cut test time.
- Power Cord Leakage Circuit for Shield Crack Detection
Shield continuity detection trips both live and neutral switches when the cord sheath cracks, preventing exposed cores, short-circuits, and fire.
- GFCI Controller Logic for Self-Test and Fault Trip Discrimination
A microcontroller compares sensor and reference signals to separate GFCI self-tests from real ground faults and avoid false tripping.