2CSG280515R1000 ABB CT1M-7 2500 Current Transformer 2500 A/5 A

Why Choose the ABB CT1M-7 2500 Current Transformer?

The ABB CT1M-7 2500, order code 2CSG280515R1000, 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-7 2500 is designed according to IEC 61869-2. Its through-primary construction and large 101 × 56 mm rated cross-section make it particularly suitable for substantial busbar installations in industrial distribution equipment and high-current electrical switchboards.

With a 2500 A rated primary current, 5 A rated secondary current and accuracy class 0.5, the CT1M-7 2500 provides a 2500:5 transformation ratio for accurate indirect electrical measurement. It provides a rated output of 15 VA at class 0.5, 15 VA at class 1 and 15 VA at class 3, together with an FS 10 current limiting factor.

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.
• 15 VA rated output at class 0.5 for demanding metering applications.
• Large 101 × 56 mm rated cross-section accommodates substantial busbar installations.
• FS 10 current limiting factor for metering applications.
• Busbar and mounting feet fixings are supplied as standard, with an optional DIN rail mounting adapter available.

Key Features

• ABB CT1M-7 current transformer series.
• 2500 A rated primary current.
• 5 A rated secondary current.
• 2500:5 current transformation ratio.
• Accuracy class 0.5.
• 15 VA rated output at class 0.5.
• 15 VA rated output at class 1.
• 15 VA rated output at class 3.
• FS 10 current limiting factor.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• Through-primary construction with a 101 × 56 mm rated cross-section.

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-7 2500 converts a nominal 2500 A primary current into a 5 A secondary current. Its class 0.5 accuracy, 15 VA class 0.5 output and large 101 × 56 mm rated cross-section make it suitable for accurate indirect current measurement in high-current industrial distribution, switchboard, power monitoring and energy management applications.

Typical Applications

• High-current electrical energy metering systems.
• Industrial power distribution installations.
• Main electrical switchboards and distribution boards.
• 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 busbar current measurement applications.
• Industrial panel-building and electrical instrumentation systems.