For a three-phase AC-51 application, for a current> 50A, can I use an SGT - SVT, or these relays are limited to 50A by the connections?

For "heating" applications, it is preferable to use 2 or 3 single-phase relays. Our SGT / SVT in 75, 95, and 125A are suitable for applications with non-permanent peak currents (lamps, motors, ...) or for better protection.