Electric Furnace Transformer Protection Solution

Ⅰ. Background Introduction​

Electric furnace transformers are common equipment in industrial production processes, used to convert electrical energy into thermal energy for heating, melting, or sintering materials. However, during operation, electric furnace transformers may encounter various problems such as voltage fluctuations, over-current, and short circuits. These issues can lead to equipment damage, production interruptions, and even safety accidents. Therefore, to ensure the safe operation of electric furnace transformers, it is necessary to implement a series of protective measures and solutions.

​II. Problem Analysis​

1. ​Voltage Fluctuations:​​ During operation, electric furnace transformers may be affected by grid voltage fluctuations, causing the equipment to malfunction.
2. ​Over-Current:​​ During operation, electric furnace transformers may generate excessive current, exceeding the rated load of the equipment, leading to overload or even burnout.
3. ​Short Circuits:​​ Short circuits may occur in the circuit system of an electric furnace transformer, causing the equipment to malfunction or even triggering safety accidents such as fires.

​III. Solution​

To address the aforementioned problems, the following protection solutions for electric furnace transformers are proposed:

1. ​Voltage Fluctuation Protection:​​ To mitigate voltage fluctuation issues, voltage stabilizers are recommended for voltage regulation. Voltage stabilizers can automatically adjust the output voltage based on changes in grid voltage, ensuring the transformer operates stably within the rated voltage range. Simultaneously, over-voltage and under-voltage alarm devices can be installed. Once the voltage deviates beyond the set range, an alarm is triggered promptly to notify operators to take appropriate measures.
2. ​Over-Current Protection:​​ To prevent electric furnace transformers from overloading and burning out, it is recommended to install over-current protection devices in the circuit. Over-current protection devices can automatically cut off the circuit based on the current magnitude to safeguard the equipment. Additionally, over-current alarm devices can be set up. When the current exceeds the preset value, an alarm is activated promptly to alert operators to inspect the equipment and take necessary actions.
3. ​Short Circuit Protection:​​ To prevent safety hazards caused by short circuits in electric furnace transformers, it is recommended to install short circuit protection devices in the circuit. Short circuit protection devices can detect a short circuit promptly and disconnect the circuit, preventing excessive current from causing accidents like fires. Concurrently, short circuit alarm devices can be installed. Once a short circuit occurs, an alarm is triggered immediately to notify operators to inspect the equipment and take measures.

​IV. Implementation Steps​

1. ​Research and Selection:​​ Based on the specific conditions of the electric furnace transformer, conduct market research to select suitable voltage stabilizers, over-current protection devices, and short circuit protection devices.
2. ​Installation and Commissioning:​​ Install and commission the equipment according to the equipment manuals and relevant standards. Ensure the equipment is installed correctly and that all parameters are properly configured.
3. ​Connection and Wiring:​​ Perform equipment connection and wiring according to the electric furnace transformer's circuit system. Ensure all connections to the circuit system are correct and reliable.
4. ​Testing and Verification:​​ After installation is complete, test and verify the equipment's functionality. Simulate actual operating conditions to check whether the protection functions operate correctly.
5. ​Regular Maintenance:​​ To ensure long-term stable operation of the equipment, perform regular maintenance.