K8090 relais usable to switch 1000 V DC / 3 A DC

Hallo everyone, I am interested to switch a 1000 V DC power supply with 3.6 kW between different loads with your relays card. Are these relays build to withstand the high voltage? Is it possible to replace the relays with other high voltage relays?
Thank you in advance for your support and effort!
Best regards
Simon