2CSG280585R1000 ABB CT1M-10 2500 Current Transformer 2500 A/5 A

Why Choose the ABB CT1M-10 2500 Current Transformer?

The ABB CT1M-10 2500, order code 2CSG280585R1000, is a 2500 A/5 A through-primary current transformer designed for indirect measurement of electrical parameters in high-current metering, monitoring and energy management applications. Part of ABB's Metering Accessories range, it transforms a high primary current into a standardised 5 A secondary current for compatible electricity meters, network analysers and measuring instruments.

As part of the ABB CT1M current transformer series, the CT1M-10 2500 is designed according to IEC 61869-2. Its large through-primary aperture supports both cable and busbar installations, making it particularly suitable for industrial distribution boards, main switchboards and other high-current electrical systems.

With a 2500 A rated primary current, 5 A rated secondary current and accuracy class 0.5, the CT1M-10 2500 provides a 2500:5 transformation ratio for accurate indirect electrical measurement. It delivers 45 VA at class 0.5, 45 VA at class 1 and 45 VA at class 3, while accommodating cables up to 86 mm and horizontal or vertical busbars up to 100 × 30 mm, 80 × 50 mm or 70 × 60 mm.

Key Advantages

• Designed for high-current indirect electrical measurement applications.
• 2500 A/5 A current ratio for compatible metering and monitoring equipment.
• Accuracy class 0.5 supports precise current and energy measurement.
• 45 VA rated output at class 0.5 for demanding metering applications.
• Large through-primary aperture accommodates cables up to 86 mm.
• Suitable for horizontal and vertical busbars up to 100 × 30 mm, 80 × 50 mm or 70 × 60 mm.
• Busbar and mounting feet fixings are supplied as standard for convenient installation.

Key Features

• ABB CT1M-10 current transformer series.
• 2500 A rated primary current.
• 5 A rated secondary current.
• 2500:5 current transformation ratio.
• Accuracy class 0.5.
• 45 VA rated output at class 0.5.
• 45 VA rated output at class 1.
• 45 VA rated output at class 3.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• Large 86 mm cable aperture.
• Through-primary construction for cable and horizontal or vertical busbar installations.

Reliable Indirect Measurement for High-Current Electrical Systems

Current transformers allow meters and measuring instruments to monitor electrical circuits carrying currents above their direct measurement range. The transformer produces a proportional secondary current, allowing electrical parameters to be measured without routing the full primary circuit current through the connected measuring instrument.

The ABB CT1M-10 2500 converts a nominal 2500 A primary current into a 5 A secondary current. Its class 0.5 accuracy, 45 VA class 0.5 output and large conductor aperture make it particularly suitable for accurate indirect current measurement in industrial distribution boards, main switchboards, power distribution systems and energy management installations using substantial cables or busbars.

Typical Applications

• High-current electrical energy metering systems.
• Industrial power distribution installations.
• Main distribution switchboards and electrical panels.
• Indirect measurement of circuits with a 2500 A nominal current.
• Energy monitoring and management systems.
• Current measurement with compatible network analysers, meters and instrumentation.
• Large cable and busbar current measurement.
• Industrial panel-building and electrical instrumentation applications.