FF TI-400-5-02S Current Transformer 400/5A, Accuracy Class 0.2s, Aperture 32mm

The FF TI-400-5-02S is a high-precision current transformer engineered for accurate electrical measurement in industrial and commercial power systems. This device is designed to convert high primary currents into a manageable secondary current of 5A, maintaining a precise 400/5A transformation ratio. With its specialized accuracy class 0.2s, it provides reliable data for energy monitoring, billing, and protection applications where high precision is critical.

Advantages

The primary advantage of this current transformer is its high accuracy class, which ensures minimal measurement error even at low current levels. Its robust construction allows for consistent performance in demanding electrical environments. The 32mm aperture provides sufficient space for various cable sizes, simplifying the installation process in existing switchgear or control panels. By delivering precise signals to meters and relays, it supports efficient energy management and enhances the reliability of electrical protection systems.

Suitable for

• Energy monitoring and sub-metering systems
• Industrial power distribution panels
• Protection relay circuits
• Commercial building electrical infrastructure

When it may not be suitable

This transformer is not intended for use in high-voltage transmission lines or environments exceeding its specified insulation levels. It is also not suitable for applications requiring a transformation ratio other than 400/5A or for installations where the primary conductor diameter exceeds the 32mm aperture limit.

Key specifications

• Transformation ratio: 400/5A
• Accuracy class: 0.2s
• Aperture diameter: 32mm
• Application: Electrical measurement and protection

How to use

Installation should be performed by a qualified electrician in accordance with local electrical regulations. The primary conductor must be passed through the 32mm aperture of the transformer. Ensure that the polarity markings are observed correctly when connecting the secondary terminals to the measuring instrument or protection relay. The secondary circuit must be properly terminated to prevent high-voltage buildup, which can occur if the secondary side is left open while the primary is energized.

What to consider before purchase

• Verify that the 400/5A ratio matches your specific load requirements.
• Ensure the primary cable diameter fits within the 32mm aperture.
• Confirm that the 0.2s accuracy class meets the standards required for your metering or protection application.

Usage recommendations

Always ensure the secondary circuit is connected to a load or short-circuited before energizing the primary conductor to prevent damage to the transformer and ensure operator safety.