表面涂层绝缘的测试是 , 将两片导电板分别放在磁粉芯的两个端面 , 用 50Hz , 1250V (AC有效电压)测试电压,时间为5秒. TYDZ HT Iron Powder Cores Series are coated by improved epoxy that can resist high temperature up to H grade.The coating also complies with the requirement of environmental ...