How to Use Kontaktor : Examples, Pinouts, and Specs

A kontaktor is an electromechanical switch designed to control high-power circuits using low-power signals. Manufactured by Schneider, the High Volt kontaktor is a reliable and robust solution for industrial applications. It is commonly used to switch electrical loads such as motors, lighting systems, heating elements, and other high-power devices. Its ability to handle high currents and voltages makes it an essential component in automation and power distribution systems.

• Motor control in industrial machinery
• Switching high-power lighting systems
• HVAC systems
• Power distribution in industrial plants
• Automation systems for controlling heavy electrical loads

The High Volt kontaktor has the following pin configuration:

1. Power Connections:

   • Connect the three-phase AC input to the terminals L1, L2, L3.
   • Connect the load (e.g., motor, lighting) to the output terminals T1, T2, T3.

2. Control Circuit:

   • Connect the control voltage (e.g., 24V DC) to the coil terminals A1 and A2.
   • Ensure the control circuit includes a switch or relay to activate the coil.

3. Auxiliary Contacts (if applicable):

   • Use the NO or NC auxiliary contacts for additional control or feedback in the circuit.

4. Mounting:

   • Secure the kontaktor to a DIN rail or panel using the provided mounting hardware.

• Voltage and Current Ratings: Ensure the load does not exceed the rated voltage (690V AC) or current (32A).
• Coil Voltage: Verify that the control voltage matches the coil's rated voltage (24V DC).
• Overload Protection: Use appropriate fuses or circuit breakers to protect the circuit.
• Noise Suppression: Install a surge suppressor across the coil terminals to reduce electrical noise.
• Wiring: Use appropriately rated wires for both the power and control circuits.

The High Volt kontaktor can be controlled using an Arduino UNO and a relay module. Below is an example circuit and code:

• The Arduino controls a relay module, which in turn activates the kontaktor's coil.
• The relay module isolates the Arduino from the high-power circuit.

// Define the pin connected to the relay module
const int relayPin = 7;

void setup() {
  // Set the relay pin as an output
  pinMode(relayPin, OUTPUT);
  // Ensure the relay is off at startup
  digitalWrite(relayPin, LOW);
}

void loop() {
  // Turn on the relay (activates the kontaktor)
  digitalWrite(relayPin, HIGH);
  delay(5000); // Keep the kontaktor on for 5 seconds

  // Turn off the relay (deactivates the kontaktor)
  digitalWrite(relayPin, LOW);
  delay(5000); // Wait for 5 seconds before repeating
}

• Always disconnect power before wiring or servicing the kontaktor.
• Regularly inspect the contacts for wear and replace them if necessary.
• Use proper insulation and grounding to ensure safety.

1. Can the High Volt kontaktor be used for single-phase loads?

   • Yes, connect the single-phase load to one of the poles (e.g., L1 and T1).

2. What is the purpose of auxiliary contacts?

   • Auxiliary contacts provide feedback or control signals for automation systems.

3. How do I know if the coil is damaged?

   • Measure the resistance across A1 and A2. If it is open or significantly different from the specified value, the coil may be damaged.

By following this documentation, you can effectively use the Schneider High Volt kontaktor in your projects and ensure reliable operation.