MV RSL-4 switchgear – structure
Cut-off switches with KLS earthing switches were installed in this type of switchgear. The sole activation of a cut-off switch requires inserting a special removable lever into the drive socket. In the case of variant 4, it is located directly on the cut-off switch shaft. This makes the control operations convenient. To safeguard full security and reliability of operation, cut-off switches with earthing blades feature a mechanical interlock (factory-installed), which prevents from cut-off switch activation at a closed earthing switch and, no less importantly, closing the earthing switch at an activated cut-off switch. However, this variant is equipped with a special, factory-installed mechanical interlock located between the cut-off switch drive and switchgear door.
MV RSL-4 switchgear busbar system
The system is made of an insulated copper rod, while partitions between the cells are made of insulation plates. Again, this allows maximum risk reduction and better switchgear functionality. Additionally, there is a possibility of equipping feeder bays with special motor drives that we have designed on our own. The provide the switchgear with additional options. Similarly as with variants RSL-2, 3, 5 and 7, the MV RSL-4 switchgear is marketed as an arc-proof “1” version. MV switchgears of the RSL-4 type meet the following European standards: PN-EN 60298:2000, PN-EN 60694:2001 and PN-EN 60265-1:2001. Additionally, the fourth variant comes with a certificate no. 707 issued by the Institute of Power Engineering in Warsaw.