These Ground Fault Sensors (type GFL) are available in a variety of sizes. Care should be taken when determining the physical size of the senor window. The Ground Fault Sensor will only respond to ground faults that occur between the position of the sensor and the load. Each sensor comes with both normal and test windings. These sensors are only for use with GFP and BGFL relays. 
Ground Fault Sensors for GFP, GFPV, and BGFL Relays
- Including Split Core
The GFL Ground Fault Sensor manufactured by Electromagnetic Industries LLP is used with the GFP, GFPV, and BGFL Ground Fault Relays to provide a way to detect and protect from Ground Fault Conditions in Grounded AC power systems.
Ground Fault Sensors for the GFM
- Including Split Core
The GFM Sensor manufactured by Electromagnetic Industries LLP is used with the GFM.