CTD9S12505AXXX – 1250 A Primary current, 5A output 35×125 mm

Why Choose the Carlo Gavazzi CTD9S12505AXXX Current Transformer?

The Carlo Gavazzi CTD9S12505AXXX is a reliable split-core AC current transformer (CT) designed for accurate measurement of high currents in industrial electrical installations, energy monitoring systems and distribution panels. As part of the Carlo Gavazzi CTD9S current transformer series, it converts a rated primary current of 1250 A into a standard 5 A secondary output for connection to compatible meters, power analysers and monitoring equipment.

The split-core construction allows the transformer to be opened and installed around an existing conductor or busbar without removing the primary conductor. This makes the CTD9S12505AXXX particularly suitable for retrofit energy-monitoring projects, switchboard upgrades and industrial installations where disconnecting large power conductors would be inconvenient.

With a 1250 A primary current rating, 5 A secondary output and accuracy class 1, the CTD9S12505AXXX provides dependable current measurement for demanding applications. Its rectangular opening of approximately 126 × 36 mm accommodates busbars up to approximately 125 × 35 mm, making it well suited to high-current distribution systems and large industrial switchboards.

Key Advantages

• Practical split-core current transformer for industrial AC current measurement.
• 1250 A rated primary current suitable for high-current electrical distribution systems.
• Standard 5 A secondary output for compatible meters and monitoring equipment.
• Class 1 accuracy for dependable electrical and energy measurement.
• 8 VA rated secondary apparent power at class 1.
• Large rectangular opening suitable for busbars up to approximately 125 × 35 mm.
• Split-core construction simplifies installation around existing conductors and busbars.

Key Features

• Carlo Gavazzi CTD9S current transformer series.
• 1250 A rated primary current.
• 5 A rated secondary current.
• 1250/5 A transformation ratio, equivalent to 250:1.
• Accuracy class 1.
• 8 VA rated secondary apparent power at class 1.
• 12 VA rated secondary apparent power at class 3.
• 48–62 Hz operating frequency for AC measurement applications.
• 0.72 kV maximum system voltage.
• 3 kV RMS rated insulation level at 50 Hz for 1 minute.
• FS 5 overcurrent limiting factor.
• Rectangular opening of approximately 126 × 36 mm.
• Suitable for busbars up to approximately 125 × 35 mm.
• Split-core construction for convenient retrofit installation.
• Double screw connection terminals for practical secondary wiring.

Flexible Current Measurement for Industrial Installations

Current transformers such as the Carlo Gavazzi CTD9S12505AXXX proportionally reduce high primary currents to a standard secondary current that can be measured by compatible instrumentation. With a 1250/5 A ratio, a 1250 A primary current corresponds to a 5 A secondary current, allowing meters and monitoring equipment to measure high-current circuits without carrying the full primary load current.

The CTD9S series combines high-current measurement capability with the installation convenience of a split-core design. Because the core can be opened and fitted around an existing conductor or busbar, the CTD9S12505AXXX is particularly suitable for retrofit energy monitoring, electrical distribution upgrades and industrial installations where removing existing conductors would be impractical.

Typical Applications

• Industrial electrical switchboards and distribution panels.
• Retrofit energy monitoring installations.
• Energy meters and power monitoring systems.
• Building energy management systems.
• Industrial machinery and automation panels.
• Electrical load and consumption monitoring.
• Power quality and electrical measurement equipment.
• Commercial and industrial busbar installations.