3534-MANUL-V01.00.03 HFCT1 Operating Manual
12 August 2021
Page 1 of 10
1.
General Description
This document provides safety information, specifications, and guidelines for using the High-Frequency Current
Transformer (HFCT). HFCTs are designed to detect small high-frequency pulses on ground lines caused by
partial discharge events whilst attenuating any circulating 50 Hz currents. The HFCT1-F range is a split toroid
arrangement and comes in two aperture size variants (50 and 100mm) allowing for easy clamping around
insulated cables. The HFCT1-F100 comes with a rubber insert for the aperture with a range of diameters to
support the HFCT around the measured conductor and improve accuracy for smaller cable sizes.
Measurements from the HFCT can be taken from the insulated BNC connection when connected to a specified
EA Technology product such as the UltraTEV
®
Plus
²
(UTP2) or UltraTEV
®
Monitor Cable PD Node (UTMN1-CPD).
Figure 1 HFCT1-F50
Figure 2 HFCT1-F100
