For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:tiwai:kernel:4.17/standard/home:tiwai:kernel:4.17.repo
zypper refresh
zypper install kernel-default-base
For PPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:tiwai:kernel:4.17/PPC/home:tiwai:kernel:4.17.repo
zypper refresh
zypper install kernel-default-base
For ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:tiwai:kernel:4.17/ARM/home:tiwai:kernel:4.17.repo
zypper refresh
zypper install kernel-default-base