Discussion about the problem of lightning strike in OPGW application

At present, there are still some nebulous understanding problems when the lightning strikes to OPGW. For example the lightning strike causes the electric arc to make OPGW melting and broken, the calculation of lightning charge, the testing criterion and the optimize measure for engineering design. After studying we think that the high temperature caused by lightning arc is the main reason of OPGW melting and broken, then a formula for calculate lightning charge is suggested, give some requirements for modifying the test criterion of lightning test. At last the article gives some suggestions of the optimize measure for engineering design.