2CSG280275R1000 ABB CT1M-2 200 Current Transformer 200 A/5 A

Why Choose the ABB CT1M-2 200 Current Transformer?

The ABB CT1M-2 200, order code 2CSG280275R1000, is a compact 200 A/5 A current transformer designed for indirect measurement of electrical parameters in metering, monitoring and energy management applications. Part of ABB's Metering Accessories range, it transforms higher primary currents 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-2 200 is manufactured in accordance with IEC 61869-2 and uses a through-primary construction. The monitored cable or busbar passes through the transformer aperture, providing a straightforward current sensing solution for electrical distribution panels, switchboards and energy monitoring systems.

With a 200 A rated primary current, 5 A rated secondary current and accuracy class 0.5, the CT1M-2 200 provides a 200:5 transformation ratio for accurate indirect electrical measurement. It provides 3.75 VA at class 0.5 and 5 VA at classes 1 and 3, operates at 50–60 Hz and features an IP20 protection rating.

Key Advantages

• Compact current transformer designed for indirect electrical measurement.
• 200 A/5 A current ratio for compatible metering and monitoring equipment.
• Accuracy class 0.5 supports precise current and energy measurement.
• 3.75 VA output at class 0.5 and 5 VA output at classes 1 and 3.
• Through-primary construction supports installation around compatible cables and busbars.
• Designed in accordance with IEC 61869-2.
• Busbar and mounting feet fixings are supplied as standard, with an optional DIN rail mounting adapter available.

Key Features

• ABB CT1M current transformer series.
• 200 A rated primary current.
• 5 A rated secondary current.
• 200:5 current transformation ratio.
• Accuracy class 0.5.
• 3.75 VA rated output at class 0.5.
• 5 VA rated output at class 1.
• 5 VA rated output at class 3.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• Through-primary design with capacity for cable conductors up to 21 mm and horizontal busbars up to 20 × 10 mm.

Reliable Indirect Measurement for 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-2 200 converts a nominal 200 A primary current into a 5 A secondary current. Its class 0.5 accuracy, through-primary construction and compact dimensions make it suitable for integrating accurate indirect current measurement into commercial and industrial electrical distribution and energy monitoring systems.

Typical Applications

• Electrical energy metering systems.
• Commercial and industrial distribution panels.
• Electrical switchboards and control cabinets.
• Indirect current measurement applications.
• Energy monitoring and management systems.
• Current measurement with compatible network analysers and meters.
• Cable and busbar current measurement.
• Panel-building and electrical instrumentation applications.