Fully wired and tested star-delta combinations cover a power range up to 75 kW, for higher ratings a DIY kit is available. For powers up to 7.5 kW, a combination with a front-mounted time relay is available, from 7.5 kW to 75 kW. with a time relay located on the side. These combinations are offered for both AC (24V, 110V, 230V) and DC 24V.