FF TOM-400-5 Miniature Split-Core Current Transformer 400/5A 1.5VA

The FF TOM-400-5 is a miniature split-core current transformer engineered for accurate current monitoring in electrical installations. Featuring a transformation ratio of 400/5A and a power rating of 1.5VA, this device is specifically designed to facilitate non-invasive current measurement. Its compact split-core architecture enables technicians to install the sensor directly onto existing cables without the need to disconnect or interrupt the primary circuit, making it an efficient solution for retrofitting and maintenance tasks.

Advantages

The primary benefit of the FF TOM-400-5 lies in its split-core design, which significantly reduces installation time and labor costs by eliminating the need for circuit shutdowns. Its miniature form factor is ideal for integration into crowded electrical panels or enclosures where space is at a premium. Furthermore, the device provides reliable and precise measurement data, ensuring consistent performance for energy management and monitoring systems while maintaining high safety standards during operation.

Suitable for

• Energy monitoring and sub-metering systems
• Industrial automation and control processes
• Retrofitting existing electrical installations
• Load management and power distribution monitoring

When it may not be suitable

This transformer is not intended for use in high-voltage power transmission lines or environments exceeding its specified current and power ratings. It is also not suitable for applications requiring permanent, high-precision laboratory-grade calibration where a solid-core transformer might offer slightly lower phase shift characteristics.

Key specifications

• Transformation ratio: 400/5A
• Power rating: 1.5VA
• Design: Split-core (openable)
• Application: Miniature current measurement

How to use

To install the FF TOM-400-5, open the split-core housing by releasing the locking mechanism. Place the transformer around the primary conductor that needs to be monitored. Ensure the core surfaces are clean and free of debris before snapping the housing shut securely. Once closed, connect the secondary output terminals to your measuring device, such as a power meter or data logger, ensuring the polarity is correct for accurate readings.

What to consider before purchase

• Verify that the primary current does not exceed 400A
• Ensure the secondary input of your measuring device is compatible with a 5A signal
• Check the physical dimensions of the cable to ensure it fits within the transformer aperture
• Confirm the required accuracy class for your specific monitoring application

Usage recommendations

Always ensure that the secondary circuit is connected to a load or shorted before energizing the primary conductor to prevent dangerous voltage build-up. Follow all local electrical safety regulations during installation.