តើ​អ្វី​ទៅ​ជា​មូល​ហេតុ​ដែល​ធ្វើ​ឱ្យ​ ឡភ្លើងធន់នឹងប្រអប់ trips under normal heating conditions?

1. The switch is damaged;

2. The electric resistance furnace leaks and the protection switch works;

3. Short circuit caused by the burning of the furnace wire;

4. The switch current is overloaded and tripped.