The **KTS-14-R** is a specific model of a **Bimetallic Thermostat (Temperature Switch)**, typically manufactured by companies like **Stego** or similar industrial component brands. These devices are used for regulating temperatures or triggering alarms within electrical enclosures. ### 1. Technical Specifications The "R" in the model suffix usually denotes it is a **Normally Closed (NC)** contact, often used for controlling heaters. | Feature | Specification | | :--- | :--- | | **Contact Type** | Normally Closed (NC) / Break contact | | **Switching Tolerance** | +/- 5K to 7K | | **Sensor Element** | Thermostatic Bimetal | | **Contact Resistance** | < 10 mOhm | | **Service Life** | > 100,000 cycles | | **Max. Switching Capacity** | 15A (AC 120V) / 10A (AC 250V) | | **Mounting** | 35mm DIN rail clip | --- ### 2. Internal Electronic Parts & Mechanics While these are mechanical thermostats, their operation relies on the physics of specific electronic materials: * **Bimetallic Strip:** The core "brain" of the part. It consists of two different metals bonded together. Because the metals expand at different rates when heated, the strip bends, physically opening or closing the electrical circuit. * **Snap-Action Contact:** To prevent "arcing" (sparks) that occur with slow movement, the KTS-14-R uses a snap-action mechanism. This ensures the connection is broken instantly once the threshold is reached. * **Adjustment Dial:** A potentiometer-style plastic knob connected to a spring. Turning the dial changes the tension on the bimetallic strip, thereby changing the temperature at which it will bend. * **Housing Material:** High-grade plastic (typically UL94 V-0) that provides electrical insulation and heat resistance. --- ### 3. Circuit Application In an industrial control panel, the KTS-14-R acts as a series switch. ```mermaid graph LR Power_Source --- KTS-14-R KTS-14-R --- Heater Heater --- Neutral ``` * **Logic:** When the temperature is **below** the set point, the contact is closed, allowing current to flow to the heater. * **Action:** Once the temperature **reaches** the set point, the bimetal snaps open, cutting power to the heater to prevent overheating. --- ### 4. Differences: KTS vs. KTO It is common to see the KTS paired with its counterpart: 1. **KTO 011 (NC):** Red Dial. Used for **Heaters**. It opens the circuit when it gets too hot. 2. **KTS 011 (NO):** Blue Dial. Used for **Fans**. It closes the circuit when it gets too hot to start cooling.