The DI Series Shunt isolator enables accurate current measurements in rail traction applications. They measure the very small voltages developed across low-resistance shunts in the primary power conductors feeding rail traction motors, spanning ranges of 30 to 200 mVRMS. Employing patented insulating technology, the components allow rail-traction designers to meet the provisional EN 50463 standard for on-board energy monitoring. When used with a shunt Class 0.2 accuracy, they reach the required Class 1R accuracy. Other features include a withstanding voltage of 18.5 kVRMS/50 Hz for one minute, a current consumption of 20 to 25 mA, and a bandwidth of 10 kHz. LEM USA INC., Milwaukee, WI. (800) 236-5366.