试验方法与验收规则
Test methods and acceptance rules
每个电加热器在装配完毕后，在常温下用500V兆欧表测量其绝缘电阻不得低于50 M Ω。并经受1500V耐压试验，历时1min而无击穿或闪路现象。然后在空气中于额定工作电压下通电加热2-3min，不得有过热现象，且绝缘电阻不得低于0.5 M Ω，泄漏电流每千瓦不大于0.5mA。并检测其功率，是否符合订货要求（偏差±5%），试验后，检查电加热器各部分是否完整无缺。
After each electric heater is assembled, its insulation resistance must not be less than 50 M_measured by 500V megohm meter at room temperature. After 1500V voltage withstanding test, it lasted 1 minute without breakdown or flashover. Then heated in air at rated working voltage for 2-3 minutes without overheating, and insulation resistance should not be less than 0.5 M_, leakage current per kilowatt should not be less than 0.5 MA. The power of the electric heater is tested to meet the order requirement (deviation (+5%). After the test, the parts of the electric heater are checked whether they are complete or not.
每个电加热器应经制造厂质量检查部门检查合格，并附有合格证，方可发货。
Each electric heater shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a certificate for delivery.