How to Use TR-HTSE: Examples, Pinouts, and Specs

The TR-HTSE is a thermal relay designed for temperature control in electrical circuits. It provides reliable protection against overheating by interrupting the circuit when a preset temperature threshold is exceeded. This component is widely used in industrial, commercial, and residential applications to safeguard electrical equipment and systems from thermal damage.

• Overheating protection for motors, transformers, and other electrical devices.
• Temperature regulation in HVAC systems.
• Safety mechanisms in industrial machinery.
• Thermal monitoring in power distribution systems.

1. Wiring the Component:

   • Connect the power supply to the L1 pin.
   • Connect the load (e.g., motor or heater) to the T1 pin.
   • Use the COM, NC, and NO pins to integrate the relay into your control circuit:
     • For normally closed operation, connect the load to the NC pin.
     • For normally open operation, connect the load to the NO pin.
   • Ensure the GND pin is connected to the circuit ground.

2. Setting the Temperature Threshold:

   • Use the adjustment knob or digital interface (depending on the model) to set the desired temperature threshold within the range of -20°C to 120°C.

3. Testing the Relay:

   • Power on the circuit and gradually increase the temperature of the monitored device.
   • Verify that the relay trips (interrupts the circuit) when the set temperature is exceeded.

4. Resetting the Relay:

   • If the relay is set to manual reset mode, press the reset button after the temperature returns to a safe level.
   • For automatic reset mode, the relay will reset itself once the temperature drops below the threshold.

• Ensure the relay's current and voltage ratings match the requirements of your circuit.
• Avoid exposing the relay to excessive moisture or corrosive environments.
• Use proper insulation and secure mounting to prevent accidental short circuits.
• Regularly inspect the relay for signs of wear or damage, especially in high-temperature applications.

The TR-HTSE can be used with an Arduino UNO to monitor and control temperature. Below is an example of how to connect and program the relay:

• Connect the COM pin of the relay to a digital output pin on the Arduino (e.g., pin 7).
• Connect the NO pin to the load (e.g., a fan or heater).
• Connect the GND pin of the relay to the Arduino's GND.

// Define the relay pin
const int relayPin = 7;

void setup() {
  // Initialize the relay pin as an output
  pinMode(relayPin, OUTPUT);
  // Start with the relay off
  digitalWrite(relayPin, LOW);
}

void loop() {
  // Example: Turn the relay on for 5 seconds, then off for 5 seconds
  digitalWrite(relayPin, HIGH); // Activate the relay
  delay(5000);                 // Wait for 5 seconds
  digitalWrite(relayPin, LOW);  // Deactivate the relay
  delay(5000);                 // Wait for 5 seconds
}

1. Can the TR-HTSE be used with DC circuits?

   • Yes, the TR-HTSE supports both AC and DC circuits within the specified voltage range.

2. What happens if the temperature exceeds the maximum range?

   • The relay will trip to protect the circuit, but prolonged exposure to extreme temperatures may damage the relay.

3. How do I know if the relay is in manual or automatic reset mode?

   • Check the mode selector switch or consult the relay's user interface (if applicable).

4. Can I use the TR-HTSE for low-power applications?

   • Yes, the relay is suitable for low-power circuits as long as the current and voltage ratings are met.

By following this documentation, you can effectively integrate the TR-HTSE thermal relay into your projects and ensure reliable temperature control and circuit protection.