繁體:跳閘觸點
跳闸触点是过载继电器中的特定开关元件,当继电器的热或磁检测机制检测到过流情况时,其状态(常开或常闭)会改变。
跳闸触点是过载继电器中的特定开关元件,当继电器的热或磁检测机制检测到过流情况时,其状态(常开或常闭)会改变。这些触点直接负责切断受保护电路的电源或向控制系统发出故障信号,从而防止电机烧毁、设备损坏或火灾危险。它们经过精密设计,可在反复的热循环和机械应力下可靠运行。 跳闸触点基于继电器的检测原理工作。在热过载继电器中,双金属片因过流而受热弯曲,机械地驱动跳闸触点。在电子继电器中,电流传感器向微处理器发送信号,微处理器激励螺线管或固态开关以改变触点状态。触点物理分离或连接以断开控制电路或主电源电路,确保在检测到故障时立即断开。
诱因 → 失效模式 → 工程缓解
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NO (Normally Open) contacts close when the relay trips, typically used to activate an alarm or indicator. NC (Normally Closed) contacts open when the relay trips, used to break the control circuit and stop the motor immediately. Both provide complementary safety functions.
Inspect contacts during routine maintenance every 6-12 months for signs of arcing, pitting, or wear. Replace if contact resistance exceeds 100 mΩ or if physical damage is observed. Lifespan depends on operational frequency and load; refer to manufacturer specifications for exact intervals.
Yes, most overload relays feature a manual reset button or lever that resets the trip mechanism and returns contacts to their normal state after the fault is cleared and the relay cools down. Some models offer automatic reset options for specific applications.
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CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。
说明目标数量、应用场景、交期和关键技术要求,用于准备 RFQ 或供应商评估。