How to connect switch to load

I have a simulink model in which i have used inverter and from tere i have connected reststive load on side of model is AC source and other side is DC load ,there are 3 loads of 4,6,8kw,my simulation time is 3 second,for each 1 second i want to switch the loads I have tried many switched from simulink block,but could not find appropiate,kindly help

[Adam]

Please remember to make use of the 'Products' field when asking a question. It saves time for people scanning questions they might be able to help with. e.g. I looked into this thread, but I know nothing about Simulink so could have just ignored it if I'd seen that in the 'Product' field (I added it there, by the way).