Problem in Three-Phase programmable voltage source

So I am simulating a three phase squirrel cage motor in simulink and tested it correctly with an invariable voltage source rated at 460V, 60 Hz

I wanted to adapt the model with a programmable voltage source, so that the motor could start running with low voltage values and then increase it to 460 and stay there.

I do not know if this can be achieve with the Three-Phase programmable voltage source. I want the first 5 seconds of the simulation to increase the voltage by 92 V/s, so as I have 460 V from second 5 and beyond. It also confuses me that the block is configured in pu units.