行业组件数据 · 2026

跳闸触点

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。

技术定义与适配语境
典型 跳闸触点 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

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。

组件规格

定义
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。
工作原理
Trip contacts operate based on the relay's detection principle. In thermal overload relays, a bimetallic strip heats and bends due to overcurrent, mechanically actuating the trip contacts. In electronic relays, a current sensor signals a microprocessor, which energizes a solenoid or solid-state switch to change the contact state. The contacts physically separate or connect to break the control circuit or main power circuit, ensuring immediate disconnection upon fault detection.
材料
触点:银合金(如AgCdO、AgSnO2)具有高导电性和抗电弧性。触点载体:热塑性塑料(如PA66、PBT)具有UL94 V-0等级用于绝缘和阻燃。弹簧:磷青铜或不锈钢提供一致的机械力。端子:黄铜或铜合金镀锡具有耐腐蚀性和可焊性。
Electrical Life
> 100,000 operations at rated load
Mechanical Life
> 10 million operations
Contact Resistance
< 50 mΩ
Dielectric Strength
2500V AC for 1 minute
Contact Configuration
1NO + 1NC or 2NO + 2NC
Rated Insulation Voltage
690V AC
Operating Temperature Range
-25°C to +55°C
Rated Thermal Current (Ith)
Up to 100A
Rated Operational Current (Ie)
0.1A to 100A
Rated Operational Voltage (Ue)
600V AC
标准
IEC 60947-4-1UL 508ISO 13849-1

行业分类与别名

跳闸触点 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Excessive arcing during contact opening/closing->Contact welding, preventing circuit interruption->Use arc suppression circuits (e.g., RC snubbers), select appropriate contact material (AgSnO2), ensure proper contact pressure and alignment
Environmental contamination (dust, oil, humidity)->Increased contact resistance, insulation breakdown->Apply protective enclosures (IP rating), use sealed relay designs, implement regular cleaning schedules
Mechanical wear from frequent operation->Contact misalignment, spring fatigue, failure to trip->Design for rated mechanical life, use durable spring materials, conduct periodic functional testing

工业生态与工程逻辑

0
Contact welding due to high inrush currents
1
Insulation failure from moisture or contamination
2
Mechanical fatigue leading to unreliable operation
3
Incorrect contact rating causing overheating

合规与检测

tolerance
Contact gap: ±0.2mm; Contact force: ±10% of nominal; Operating time: ±20% of specified trip curve
test method
Dielectric testing per IEC 60947-1; Contact resistance measurement via 4-wire method; Mechanical endurance testing per IEC 60947-4-1; Thermal calibration using primary current injection

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制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between NO and NC trip contacts in an overload relay?

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.

How often should trip contacts be inspected or replaced?

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.

Can trip contacts be manually reset after tripping?

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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