Profile: Cuthbertson Laird Group specializes in offering test instruments. Our products include battery testers, breaker testers, cable tracers, clamps & multimeters, earth testers, ohmmeters, process controls and scopemeters. The SMC DC-750-T three phase shifter is used in testing power protections, power measurements transducers, wattmeters, power factor meters, energy meters and in general, any type of test that implies the electrical power concept.