Power component isolation transformer three-phase, wall mount. Designed to meet the standard horsepower, voltage ratings and harmonics of the Allen-Bradley variable speed drives. Delta primary, wye secondary, 60 Hz, aluminium wound, neutral terminal. Ambient temperature 150° rise over 40°C. 98% efficiency. 4 to 6% impedance, windings designed to withstand over current of 150% of rated load for 60 seconds or 200% of rated load for 30 seconds, (1) start every (2) hours duty cycle. Thermostats with 1 NC contact in each coil, wired in series and integral on all units. NEMA/UL Type 3R (IP32), heavy duty ventilated enclosure with metal screens protecting all vents and finished in ANSI 61 grey enclosure construction. Transformers termination up to 75 kVA have integral high and low voltage lugs installed, suitable for copper or aluminium cable installation.