【通信应用笔记】新布局的绝缘要求 AN821
APPLICATION NOTE
NEW LAYOUT INSULATION REQUIREMENT
INTRODUCTION
In order to assume better level of security for telecommunication system users, some new rules have been
published. This is the case of the IEC950 standard which dedicates one chapter to this subject. This kind
of requirement is beginning to be active in Germany for example.
REQUIREMENT
Figure 1 shows the principle of the test circuit. The test consists of the insulation measurement of the tele-
communication network and the earth. During this test it is permitted to remove components. In fact in the
field the procedure is done as follow:
……
