The Ground Fault Current Transformer, Model (Series) 5NO5, is a Split Core, outdoor, instrument current transformer that provides either 1A or 5A output current. The 5NO5 Ground Fault Current Transformer is designed for ground fault monitoring/metering of outdoor conductors and is a split-core version is meant to be installed around conductors that are at ground potential. Non-split versions are available for above ground potential installations. In either case, the 5NO5 can be completely submerged. The 5NO5 split core version has been tested submerged down to 15 feet. The unit uses corrosion proof magnetic core material and is encapsulated except for the removable top bar on the split-core version. The unit illustrated above is rated at 500A and has a 1A output. The saturation point (“knee”) depends on the external burden provided when ordering. For an outdoor current transformer with millivolt (such as 333.3mV) or milliamp (100mA), please refer to our Model 4NO4.