RFSZ-120-85 TRA05-001AC-3 3000A/1A Three-phase current sensor

RFSZ‑120‑85 / TRA05‑01AC‑3 Three‑Phase Rogowski Current Sensor

The RFSZ‑120‑85 / TRA05‑01AC‑3 is a high‑performance three‑phase Rogowski current sensor designed for accurate AC current measurement in industrial power systems. With a flexible coil structure, fast response time, and excellent linearity, it provides a reliable solution for monitoring high‑current conductors where traditional current transformers are difficult to install.

High Accuracy & Wide Measurement Range

Engineered for demanding applications, the sensor delivers 1% measurement accuracy across a wide operating range (5%–120% of rated current). Its Rogowski coil design ensures excellent linearity, minimal phase shift (<1°), and stable performance across 45–65 Hz power frequencies.

Robust Electrical Performance

• Rated input current: 3000 A
• Rated output: 1 A AC (max 1.2 A AC)
• Response time: < 20 ms
• Maximum burden: 0.5 Ω
• Power supply: 24 V DC (±10%), 10 W

The sensor’s fast response and high overload tolerance make it ideal for dynamic load monitoring, protection systems, and power quality analysis.

Flexible Installation & Industrial Durability

The 120 mm coil diameter and 384 mm coil length allow easy installation around large busbars and cables without disconnecting conductors. The coil is rated IP67, ensuring reliable operation in harsh environments, while the integrator unit meets IP20 protection standards.

Environmental & Safety Compliance

Built for long‑term stability, the sensor withstands extreme temperatures:

• Coil: –30 to 80 °C
• Integrator: –20 to 60 °C

It complies with IEC 60529:2013 and IEC 61326:2013, and supports 1000 V CAT III / 600 V CAT IV measurement categories.

Applications

• Power distribution monitoring
• Industrial automation
• Energy management systems
• High‑current busbar measurement
• Smart grid and metering solutions
• Protection and fault‑diagnostic systems