Overload Protection Arrangements TRIZ Cases

A dedicated probe box creates a low-resistance high-current path and plug-in detection, helping multimeters measure up to 30 A without heat damage.

A detachable meter pen box lowers loop resistance with copper inserts and elastic terminals, enabling safer 30A multimeter testing.

A parallel current-diverting coil with an air-gapped magnetic core redirects DC leakage from AC lines to prevent transformer saturation and overload.

A shunt-based measuring circuit detects overloads and opens the semiconductor switch before damage, while enabling threshold-based restart control.

Parallel-switched burden resistors protect photonic current or voltage transducers from fault levels while extending dynamic range and low-end accuracy.

Self-resetting fusing elements in a probe card block fault currents before needles burn or melt, reducing probe failure and inspection downtime.

A resistor-inductor attenuator shields a passive optical voltage sensor from lightning impulses while preserving power-frequency measurement.

Parallel current drain coils with gapped magnetic cores divert DC line currents from AC transformers to prevent saturation and thermal overload.

Two-stage over-energy absorption limits lightning-induced false trips in residual current protection while preserving reliable fault detection.

Abnormal voltage and residual current detection lets a bidirectional AC converter spot DUT disconnection fast, release residual energy, and avoid output spikes.

Fuse voltage sensing pinpoints a faulty DC load after fast switch isolation, avoiding current transformers and preserving fault location data.

A parallel resistor-inductor attenuator protects a piezoelectric fibre Bragg grating voltage sensor from lightning impulses while preserving grid measurement fidelity.

Indirect switching avoids oscilloscope saturation and diode reverse recovery errors when measuring GaN HEMT dynamic on-resistance.

A separate power unit and resistor network let the BMS detect relay open, closed, or fault states without battery voltage fluctuation.

Current limiting and clamp circuits bound sensed current and hold output current stable during EMI, protecting downstream stages.

A dual current path uses amplifier protective elements for range switching, preserving sub-100 pA sensitivity while handling larger currents.

Protection elements are reused in a second current path to switch from sub-100 pA sensing to larger currents without adding input-node noise.

A preformed perturbation replica is subtracted from a sigma-delta bit stream to cut latency and improve bit-error immunity in protection systems.

A sub-unity guard drive circuit stabilizes feedback-free shielding, cuts guard lag, and speeds accurate low-current measurements.

A multimeter circuit combines a mechanical relay with a fast solid-state switch to interrupt current flow rapidly.

A probe test system uses individual current limiters to constrain electrical flow through each needle during high-current semiconductor testing.

A self-aligning probe connector establishes a signal path through an electro-static discharge resistor to ground before connecting to the instrument.

Series diodes and a capacitance element protect automotive sensor output terminals from electromagnetic interference and static discharge.