Thermal protection circuit safeguards electrical systems by monitoring temperature and interrupting power to prevent overheating damage.
A thermal protection circuit is an electronic safety component integrated into power management modules that continuously monitors temperature using sensors (typically thermistors or RTDs). When temperature exceeds predetermined thresholds, it triggers protective actions such as disconnecting power, reducing current, or activating cooling systems. This prevents thermal runaway, component degradation, and fire hazards in electrical equipment.
诱因 → 失效模式 → 工程缓解
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Thermal protection circuits are resettable and electronic-based with programmable thresholds, while thermal fuses are one-time-use mechanical devices with fixed temperature ratings.
They incorporate hysteresis (typically 5-15°C difference between trip and reset temperatures) and time delays to distinguish between temporary spikes and sustained overheating conditions.
Yes, most include test modes that simulate over-temperature conditions without actual heating, allowing functional verification during maintenance.
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