Our HFCT sensors are inductively coupled around the MV/HV cables to provide a means for On-line PD measurements to be made on in-service cables, transformers and rotating machines
Each sensor inductively measures the high frequency current signals within the PD pulses flowing in the earth or the conductor of the cable without the need for any direct, galvanic connection to the HV.
The sensors can be installed permanently during a planned outage or at the build stage of a project to enable On-line PD monitoring or routine spot testing.
A temporary installation of the HFCT sensors can be carried out without an outage if the cable earth is available outside of the termination box, enabling On-line PD spot testing without the need for permanent sensors or an outage.
HFCT sensor installation at crutch of 3-core cable
Belted cables or with individually screened conductors with earth straps looped back through the HFCT.
HFCT sensors installation on single core cables
Earth strap looped back through HFCT. Mounted using silicone collars.
HFCT Sensor Range
|Installation Type||Permanent / Portable||Permanent / Portable||Permanent||Permanent|
|Internal Aperture||45 mm||94 mm||140 mm||96 mm|
|Ex/ATEX Certified Version||Yes||Yes||Yes||Yes|