Low-Power Current Transformers (LPCT / eCT)
Electronic current measurement for metering and protection, with high linearity in a compact design.
Developed by HVEX and manufactured in Brazil by Brasformer, these low-power current transformers provide current transduction for modern electrical systems. The design addresses saturation and resonance limitations while supporting reliable measurement over a wide operating range.
Lightweight and compact, they fit electrical panels, switchgear and electronic relays. Different accuracy classes and secondary-output configurations support metering, overcurrent and differential-protection applications, including ANSI 50, 51 and 87 functions.
Why it matters
High linearity for metering and protection.
Compact construction for panels and switchgear cubicles.
Intrinsic secondary protection.
Brazilian development and manufacturing by HVEX and Brasformer.
Technical specifications
Maximum system voltage: 17.5, 24 or 36 kV.
Power-frequency withstand: 34, 50 or 70 kV, respectively.
Basic insulation level (BIL): 95, 125 or 170 kV, respectively.
Creepage distance: 180, 238 or 321 mm, respectively.
Frequency: 60 Hz.
Accuracy classes: 0.2%, 0.3% and 3%.
Rated primary current: 25 A to 5 kA.
Maximum current: 25 kA.
Secondary output: 333 mV, or 1 A / 5 A using an optional amplifier.
Rated power: 0.1 VA; other power requirements use an optional power amplifier.
Standards
IEC 61869-10, IEC 60529, IEC 60255-21, IEC 60068-2, IEC 60060-1 and IEC 61000-4-2 / -3 / -5 / -6 / -8.
Applications
Electrical panels, switchgear, electronic metering relays, overcurrent and differential protection, distribution automation and smart-grid systems.
Product documentation
Download HVEX / Brasformer Low-Power Current Transformer (eCT) datasheet (English, PDF)
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