Extended Frequency Split-Core Current Transformer
The AcuCT Hinged Extended Frequency Hinged Split-Core Current Transformer captures current signatures with frequency components up to 2,000 Hz. Designed for high-fidelity waveform analysis, it is the ideal sensor for Electrical Current Signature Analysis (ECSA) and can also be used for motor current and harmonic current analysis. It enables the precise detection of harmonic sidebands, rotor bar defects, and energy anomalies in motors and generators.
- High accuracy IEC 61869-2 Class 0.5 for AcuCT-H138 Extended Frequency (EF) models
- 0.5% ratio error for AcuCT-H063 models
- Inherently safe 333mV output
- Hinged split-core design for quick installation
- Compact design for electrical panels with limited space
- UL Recognized
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| Product Datasheet | Download PDF |
About AcuCT Hinged EF Series
Current Transformers with a Extended Frequency Response
Extended frequency response allows accurate signature analysis and detect subtle electrical current faults in motor and in any electrical circuits. With enhanced linearity and low phase error displacement, it captures high order harmonics which is necessary for motor health diagnostics.
AcuCT Hinged EF Series Models
AcuCT-H063 | Input Ratings | Output Ratings | Frequency Bandwidth | Ratio Error | Window Size | Certifications |
|---|---|---|---|---|---|---|
 | 5A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 10A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized | |
| 25A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized | |
| 50A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized | |
| 100A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized | |
| 150A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
AcuCT-H063 |
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Input Ratings | Output Ratings | Frequency Bandwidth | Ratio Error | Window Size | Certifications |
|---|---|---|---|---|---|
| 5A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 10A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 25A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 50A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 100A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
| 150A | 333mV | 2 kHz | 0.5% | 0.63" | UL Recognized |
AcuCT-H138 | Input Ratings | Output Ratings | Frequency Bandwidth | Accuracy | Window Size | Certifications |
|---|---|---|---|---|---|---|
 | 200A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized |
| 400A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized | |
| 600A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized |
AcuCT-H138 |
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| |
Input Ratings | Output Ratings | Frequency Bandwidth | Accuracy | Window Size | Certifications |
|---|---|---|---|---|---|
| 200A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized |
| 400A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized |
| 600A | 333mV | 2 kHz | IEC 61869-2 Class 0.5 | 1.40" | UL Recognized |
AcuCT Hinged EF Series FAQ
What is Motor Current Signature Analysis (MCSA)?
Motor Current Signature Analysis (MCSA) is a diagnostic technique that analyzes the current waveform and frequency spectrum while the motor is operating. MCSA can detect issues such as rotor bar defects, load consistencies, load problems, mechanical imbalances, and other abnormal conditions by analyzing specific patterns within the current signal.
Can the AcuCT Hinged EF Series be used for MCSA?
Yes. The AcuCT Hinged EF Series supports MCSA and low-order spectral analysis when integrated with appropriate signal conditioning, data acquisition systems, or power analyzers.
The current transformer provides the measurement signal. Overall diagnostic capability also depends on the complete measurement system, including the analyzer and software.
What are the advantages of a 2 kHz frequency response for harmonic analysis?
A 2kHz frequency response is used to measure low-order harmonics in many industrial and commercial systems.
On a 50 Hz system, 2 kHz corresponds to approximately the 40th harmonic.
On a 60 Hz system, 2 kHz corresponds to approximately the 33rd harmonic.
This range covers a substantial portion of the low-order harmonic spectrum used in branch-circuit analysis, motor diagnostics, and industrial troubleshooting.
What applications are the AcuCT Hinged EF Series best suited for?
The AcuCT Hinged EF Series is designed for applications requiring compact installation and extended frequency response up to 2kHz. Typical applications include branch circuit monitoring, retrofit current measurement, energy monitoring and current trending, low-order harmonic analysis, Motor Current Signature Analysis (MCSA), and Electrical Current Signature Analysis (ECSA).
It is particularly suitable where easy and fast installation is required and panel space is limited.
When is the AcuCT Hinged EF preferred over a Rogowski coil?
The AcuCT Hinged EF Series is the preferred choice when installation space in a panel is limited, and the application requires cost-effective current monitoring, low-order harmonics, or MCSA within specified conductor and current limits.
The Rogowski coil is chosen for large or irregular shaped conductors. When non-saturating performance is a requirement and high-frequency analysis extends beyond 2kHz.