Siemens NXAIR M Operating Instructions Manual page 97

Operating the circuit-breaker panel with HV HRC fuse
Push the HV HRC fuse-link on the fuse holder.
Fig. 157: Fitting the HV HRC fuse-link
Pull the ends slightly to check if the HV HRC fuse-link is inserted firmly.
Insert the rear insulation cover into the housing and push it until the click noise is heard.
Fig. 158: Pushing rear insulation cover into the housing
Insert the front insulation cover into the housing and push it until the click noise is heard.
139-2021.9 / 07 NXAIR M 97