Megger HFCT High Frequency Current Transformers (PD Sensors)

Overview

Megger HFCT high frequency current transformers are partial discharge (PD) sensors designed to decouple PD signals for monitoring across medium-voltage (MV) to extra-high-voltage (EHV) systems. Typically fitted around the earth connection of cable accessories — such as a cable earth screen — they extract PD signals accurately and reliably, supporting condition monitoring and diagnostics of cable networks.

Key features of the Megger HFCT sensors

• High frequency current transformers for partial discharge (PD) signal decoupling
• Suitable for MV to EHV cable systems and accessories
• Fitted around the cable earth connection / earth screen for clean PD extraction
• Available as permanent and split-core (clip-on) types
• Wide frequency response — up to 150 MHz on the HFFCT 20
• Consistent transfer impedance (~4 Ω at 1 MHz) for reliable measurement

HFCT partial discharge monitoring applications

HFCT sensors are used in online and offline partial discharge monitoring of power cables, joints and terminations. Permanent HFCTs suit fixed continuous-monitoring installations, while split-core versions clip around an existing earth connection for periodic or portable PD surveys without disconnecting the cable.

HFCT sensor models

• HFFCT 20 — 100 kHz to 150 MHz, ~4.2 Ω, Ø 21 mm inner diameter
• HFCT SC40 (split-core) — 100 kHz to 20 MHz, ~4 Ω, 40 × 22 mm
• HFCT SC60 (split-core) — 100 kHz to 20 MHz, ~4 Ω, Ø 60 mm

Why buy Megger HFCT sensors from MME in the UAE

MOHAMMAD MAHDI Electronics Trading LLC (MME) supplies genuine Megger partial discharge sensors and monitoring equipment across Dubai, Abu Dhabi and the wider UAE, with expert technical support and fast local delivery. Contact us to select the right HFCT for your application.