Janitza CT27-64 3-Phase Current Transformer 64 A / 1 A, Class 1, 0.5 VA, 720 V AC, 27 mm Cable Opening 1503081

Install the Janitza CT27-64 current transformer in industrial power distribution panels to measure three-phase currents up to 64 A with a 1 A secondary output. It is used by electrical engineers and panel builders for energy monitoring and power quality analysis in commercial buildings and manufacturing facilities.

Key specifications

• Primary current: 64 A
• Secondary current: 1 A
• Transformation ratio: 64 A / 1 A
• Accuracy class: 1
• Rated power (burden): 0.5 VA
• Maximum operating voltage: 720 V AC
• Frequency range: 50/60 Hz
• Maximum cable diameter: 27 mm
• Mounting: cable tie, screw mounting, or DIN rail with adapter
• Housing material: polycarbonate, self-extinguishing UL94-V0
• Operating temperature: -25 °C to +50 °C
• Protection class: IP20
• Overcurrent limit factor: FS5
• Standards: IEC 61869-2

Why choose it

The CT27-64 offers reliable and accurate current measurement for three-phase systems. Its compact design and multiple mounting options simplify installation in tight spaces, while the polycarbonate housing ensures durability. With a 1 A secondary, it is compatible with standard metering and protection devices.

Ideal use cases

• Energy management systems in commercial buildings
• Power monitoring in industrial control panels
• Sub-metering for tenant billing
• Integration with Janitza power quality analyzers

Good to know

The transformer meets IEC 61869-2 and has an overcurrent limit factor of FS5, providing stable performance under overload conditions. It operates within a wide temperature range and is suitable for indoor installations.