GDZG-300 jerin DC high irin ƙarfin lantarki ma'aikaci ne gwada DC high irin ƙarfin lantarki ga tutiya oxide lighting arrester, Magnetic hura arrester, ikon igiyoyi, janareta, gidajen wuta, sauya, da sauran kayan aiki, wanda ya dace da wutar lantarki reshe, ikon sashen na masana'antu, sassan binciken kimiyya, layin dogo, masana'antar sinadarai, masana'antar wutar lantarki.