Circuit Interrupters Testing TRIZ Cases
- Insulation Transformer Circuit for External Control Status Diagnosis
An insulation transformer circuit measures primary side current changes to detect external control means operation status.
- Relay Zero-Crossing Calibration via Temperature Polynomial
A relay control system uses a temperature-dependent polynomial model to determine switching delays for precise zero-crossing operation.
- High Speed Controllable Load for AFCI Arc Simulation
A high speed controllable load generates arbitrary voltage waveforms to simulate arcing profiles for electronic testing.
- Parallel Electronic Switch for Fuse Cutout Verification
A parallel electronic switch enables diagnostic testing of primary fuse cutout capability without interrupting power supply to control devices.
- Arc Fault Circuit Interrupter Test Apparatus Using Capacitive Signal Injection
A testing apparatus uses a capacitively coupled AC signal generator to induce high-frequency signals on power lines for arc fault circuit interrupter verification.
- Relay Fault Diagnosis Using Self-Service Diagnostic Section
Self-service diagnostics using read-back circuits detect relay faults without complex external safety relays.
- DC Circuit Breaker Testing via AC Synthetic Method
Adapts an AC circuit breaker testing device to verify DC current breaking performance, eliminating the need for large-capacity rectifiers.
- Mobile DC Breaker Testing Device Using Synchronized Current Pulses
Parallel capacitor cells synchronized to shift current pulses minimize ripple and weight, enabling reproducible on-site testing of high speed DC breakers.
- Electricity Meter Relay State Detection via Control Current
A control circuit measures electromechanical relay coil current to determine the actual open or closed switching state.
- Ultra-Fast Circuit Breaker Control Relay Monitoring
Continuous monitoring of the control circuit detects faults without interrupting railway electrical installations.
- Test Device Ternary Signal Separation Switchgear Control
A test device separates input signals into positive and negative tracks via a dedicated separation unit.
- Programmable Current Sink Circuit for Industrial Relay Contacts
A programmable current sink circuit uses a digital-to-analog converter to set adjustable current magnitude across multiple inputs.
- Relay Audit Interface for Post-Mortem Failure Analysis
An audit interface transfers operational data from relay components to non-volatile memory for direct retrieval.
- Surge Protection Device Status Monitoring via Self-Service Electrical Characteristic Measurement
A monitoring system tracks surge protection device readiness through continuous electrical characteristic measurement.
- HVDC Test Circuit Using Series Converter Modules
A test circuit for high-power semiconductor elements uses series-connected voltage-controlled converter modules to generate flexible high-voltage sources.
- Relay Safety System with Sticking Detection Circuit
A relay safety system uses a sticking detection circuit to monitor contact status and generate a power-off signal when abnormalities occur.
- Safety Switch Impedance Diagnosis for EV Circuit Protection
A controller measures safety switch impedance between input and output ports to determine the switching element condition.
- Trip Coil Open Circuit Detection in Circuit Breakers
Test circuit detects trip coil open circuit conditions using a resistor and bi-directional light emitting diode series combination.
- Trip Coil Current Signature Monitoring for Circuit Breakers
A sensor measures current flowing through a circuit breaker trip coil to generate a reference signature waveform for continuous online monitoring.
- Power Converter Input Protection Test Circuit
Controller measures input voltage during startup to verify protection functionality before energizing the converter.