Introduction: 主要通过PTC监测电机温度的继电器,通过内置于电动机的热敏电阻探头感测电机绕组温度，保护*为直接、准确； 可选择手动复位、自动复位； 保护标准电动机热过载； 保护变阻器、轴承、电容器等易发热器件； 适合于频繁起动、恶劣环境等特殊状况应用；此产品是中国继电器市场**通过美国ABS船级认证产品. | | It is a Winding Protection relay based on thermistor (PTC) . It offers protections against Over heating of the windings of pumps, motors, transformers, alternators etc. & sense the temperature with the help of PTC thermistor. It can be used with single or triple PTC & also with 6 or 9 PTCs as a special case. It can used for AC/DC motor, generator, transformer, winding protection against over heating of SCRs & Bus Bars. |
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| Features: | · Monitors Overload & Phase Loss, Phase Sequence by sensing Overheating of Windings.
· Operates with Embedded PTC sensors in the motor / transformer windings.
· Suitable for any PTC Thermistor.
· Sensor Short / Open Condition Monitoring.
· 1 CO output rated 230V AC / 5A (Resistive)
· Auto (Optional Manual) Reset.
· DIN Rail mounted Enclosure.
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型号及名称 | WTRD1 | 绕组保护继电器（PTC热敏继电器） | 供电电压 | 48/110/220-240/380-415/440VAC/ | 辅助 | 24VDC±10% | 输出触点 | 1CO | 跳闸设置 | | 热敏传感器健康性 | 40Ω-4kΩ | 热敏传感器跳闸 | 4.1Ω-5.5KΩ | 热敏传感器开启 | 5.6K Ω及以上 | 热敏传感器短路 | 40Ω或更低 | 跳闸时间延迟 | 少于2秒 | 重置模式 | 自动/人工（可选） | 尺寸（mm） | | 外形尺寸（长宽直径） | 76x30.5x117.5 | 指南针尺寸（长宽） | 68mm中央对中央 | 重量 | 300克 |
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| Application Areas: | | Injection Molding machines Machine tools Crane & hoist motors Compressors & fan motors |
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| Technical Specifications: |
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| | Specifications | | 1 | Supply Voltage | Auxiliary 48 / 110 / 220-240 24 V DC ±10% | | 2 | Output Contacts | 1 CO | | 3 | Trip Setting | Thermistor Sensor Healthy 40 ohm - 4 K ohm; Thermistor Sensor Trip 4.1 K ohm - 5.5 K ohm; Thermistor Sensor Open 5.6 K ohm & above; Reset 1.5 K ohm - 1.8 K ohm for 1/3 PTC 2.2 K ohm - 2.8 K ohm for 6/9 PTC | | 4 | Trip time delay | Less than 2 secs. | | 5 | Resetting Mode | Auto / Manual (optional) | | 6 | Dimensions (mm) | Overall (L x W x D) 76 x 30.5 x 117.5; Mounting (L x W) 68 mm centre to centre | | 7 | Weight | 300 gms. |
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