We are able to supply Completely self-protected single-phase overhead transformers. Eaton’s Cooper Power series completely self-protected (CSP) single-phase overhead transformers deliver exceptional performance. With direct connected primary arresters, a MagneX interrupter or a secondary circuit breaker with internal primary voltage fuses, the CSP transformers eliminate the need for separately mounted protective devices while reducing installation costs. Available from 5-75 kVA (or 5-167 kVA with a MagneX interrupter), transformers can be filled with standard electrical grade mineral insulating oil or fire-resistant FR3 fluid.