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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RN1012-1CK00 |
| Alternative Part Number | 3RN10121CK00 |
| Manufacturer | Siemens |
| Product Type | Thermistor Motor Protection |
| Function | Standard Evaluation Unit |
| Operation Modes | Manual/Auto/Remote |
| Contacts Configuration | 1 Normally Open (NO) + 1 Normally Closed (NC) |
| Supply Voltage | 230 V AC / 110 V AC |
| Frequency | 50 Hz / 60 Hz |
| Number of Measuring Circuits | 1 |
| Temperature Range | Measurable from 60°C to 180°C |
| Features | Reclosing Interlock, Self-Reset, Defect Storage, External Reset |
| Display | LED Indicator |
| Protection Class | IP20 |
| Connection Type | Screw-Type Terminals |
| Mounting Type | Screw and Snap-On Mounting |
| Dimensions | Width: 22.5 mm, Height: 102 mm, Depth: 91 mm |
| Ambient Operating Temperature | -25°C to +60°C |
The Siemens 3RN1012-1CK00 is a robust thermistor motor protection unit designed to safeguard motors from potential overheating. This standard evaluation device is equipped with a single-pole double-throw (SPDT) contact configuration and is suitable for use with a 230 V ac supply voltage. It features a compact design with dimensions of 91 x 22.5 x 102 mm, making it an ideal choice for integration into a variety of control cabinet setups.
This thermistor relay is engineered to monitor the temperature of motors by evaluating the resistance of connected PTC thermistors. Upon detection of a temperature rise beyond the threshold, the device triggers an immediate response to disconnect the motor, thereby preventing damage due to overheating. The unit offers manual, automatic, and remote reset options, providing flexibility in control and reset methods.
The 3RN1012-1CK00 includes an LED display for clear indication of operational status and is housed in an IP20 rated enclosure, ensuring protection against solid objects larger than 12.5 mm. It is designed for straightforward screw terminal connections, facilitating easy installation and maintenance.
This device is a reliable solution for motor protection in industrial applications, where consistent performance and durability are essential. It is particularly suitable for use in environments where precise temperature monitoring and motor protection are critical for the smooth operation of machinery.
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Frequently Asked Questions
What type of protection does this thermistor provide?
The Siemens thermistor provides motor protection by monitoring the temperature of the motor windings and tripping the circuit if overheating is detected, preventing potential damage.
Can this device be manually reset?
Yes, the thermistor motor protection device features manual reset functionality, as well as options for automatic and remote resetting.
What is the voltage rating for this thermistor?
The thermistor is rated for a control supply voltage of 230 V ac or 110 V ac, depending on the application requirements.
What are the dimensions of this thermistor?
The dimensions of the thermistor are 91 mm in depth, 22.5 mm in width, and 102 mm in height.
What type of connections does the thermistor have?
The thermistor features screw-type terminals for secure and reliable electrical connections.
Is there an LED display on this thermistor?
Yes, the thermistor comes with an LED display for visual indication of the device's status.
What is the ambient operating temperature range for this thermistor?
The thermistor is designed to operate within an ambient temperature range of -25 to +60 degrees Celsius.
What is the IP rating of this thermistor?
The thermistor has an IP20 rating, indicating that it is protected against solid objects larger than 12.5 mm but not against water.
How many poles does this thermistor have?
The thermistor has 2 poles.
Does this thermistor have a reclosing interlock feature?
Yes, it includes a reclosing interlock to prevent automatic restarting of the motor after an overtemperature trip until the reset conditions are met.
Part conditions explained
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