How do I watch VCD on a digital TV? 禒 粻 救 救 救 救 救 救 救 救 盲 盲 盲 盲 盲 盲 盲 盲 盲 盲??????? I want to see, but not turn on the VCD. Hurry up! Hurry Thank you! More
Cable shield to be completely peeled, put on heat shrink tubing, both are grounded. Shielded cable, mainly to protect the outside world electric field interference, control the cable itself, the working voltage and current are strong electrical properties, the interference of external interference slow control of many other control cable is turned weak transmission signal. When the outside world has strong electrical interference, the transmission of the weak signal may be seriously distorted, so that the control system out of control, or even damage the connected instrument or instrument, accidentally, the cable itself will be breakdown of the control cable withstand the ability to withstand voltage is not only One of the determinants of the maximum allowable value of the ground potential is determined, and it is an important basis for determining the grounding mode, the grounding point and the laying path of the cable shield and the insulation fit. The control cable to withstand the power frequency over-voltage, DC over-voltage and lightning over-voltage characteristics of the experimental study. The purpose of the test program is to test the operation of the control cable due to system failure caused by ground potential rise, the cable shield in the induction of over-voltage wave intrusion when the insulation performance. The control cable is stripped at both ends of the switch and in the control room and tied to the screen cabinet. The shield is connected to one or both ends of the shield. When the ground potential rises, the cable shield may be on the core, Parts of the core of the counterattack.
The so-called "shield" on the cable structure is essentially a measure to improve the distribution of the electric field. Cable conductor from the multi-strand wire twisted together, it is easy to form an air gap between the insulation layer, the conductor surface is not smooth, will cause the electric field concentration. A layer of semiconductive material is coated on the surface of the conductor, which is in good contact with the shielded conductor and is in good contact with the insulating layer, thereby preventing partial discharge between the conductor and the insulating layer. This layer of shielding, also known as the inner shield. In the insulation surface and sheath contact, there may be gaps, cable bending, oil-paper cable insulation surface is easy to cause cracks, which are caused by partial discharge factors. A layer of semi-conductive material is applied to the surface of the insulating layer, which is in good contact with the shielded insulating layer and isotonic with the metal sheath so as to avoid partial discharge between the insulating layer and the sheath.
Cable shield to completely peel off, put on heat shrink tubing, both are grounded.
