Sealed, Mini Power-Zone Unit Substation The Square D brand Mini Power-Zone unit substation from Schneider Electric provides the answer to requirements for a portable, compact power supply for small loads. The transformer is 115C rise and epoxy-resin encapsulated. The panel section uses Square D brand QO style circuit breakers. Use Qwik-Gard circuit breakers for required ground fault protection. The Mini Power-Zone unit substation uses a separate transformer and panel section. This allows the panel section to be removed and wired first if desired. These transformers can be replaced without disturbing the panel section and associated wiring. The new transformer simply slides into the top of the panel section and primary and secondary leads are reconnected to the main circuit breakers. This Mini Power-Zone Sealed Transformer is a 1 phase, with a primary voltage of 480V and a secondary voltage of 120/240V with 2 tap offs@5 % FCBN FCAN/FCBN taps. This transformer is a B box number and has an insulation temperature rating of 185 C. This transformer colplys to UL listed standards With a rated power of 15kVA and a trmperature rise of 115 C it has a short circuit current of 18kA. This transformer is unsed in QO Load Center and are installed on the interior of the load center that has 10 spaces. This device has a NEMA rating of NEMA 3R and the enclosure material is made of hot-rolled steel. This product comes with an 18 month warranrty.