2CSG280405R1000 ABB CT1M-4 600 Current Transformer 600 A/5 A

Why Choose the ABB CT1M-4 600 Current Transformer?

The ABB CT1M-4 600, order code 2CSG280405R1000, is a 600 A/5 A closed-core through-primary 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 a high primary current into a standardised 5 A secondary current for compatible electricity meters, ammeters, multimeters and network measuring instruments.

As part of the ABB CT1M current transformer series, the CT1M-4 600 is designed according to IEC 61869-2. Its through-primary construction allows the monitored cable or busbar to pass through the transformer aperture, providing a robust current sensing solution for electrical distribution panels, switchboards and energy monitoring systems.

With a 600 A rated primary current, 5 A rated secondary current and accuracy class 0.5, the CT1M-4 600 provides a 600:5 transformation ratio for accurate indirect electrical measurement. It offers a rated output of 7.5 VA at class 0.5, 10 VA at class 1 and 12.5 VA at class 3, while accommodating cables up to 31 mm and horizontal busbars up to 40 × 10 mm or 30 × 20 mm.

Key Advantages

• Purpose-designed current transformer for indirect electrical measurement.
• 600 A/5 A current ratio for higher-current metering and monitoring applications.
• Accuracy class 0.5 supports precise current and energy measurement.
• 7.5 VA rated output at class 0.5 for demanding metering applications.
• Accommodates cables up to 31 mm and horizontal busbars up to 40 × 10 mm or 30 × 20 mm.
• FS 5 overcurrent limiting factor for metering applications.
• Compact closed-core construction suits switchboards, distribution panels and energy monitoring systems.

Key Features

• ABB CT1M-4 current transformer series.
• 600 A rated primary current.
• 5 A rated secondary current.
• 600:5 current transformation ratio.
• Accuracy class 0.5.
• 7.5 VA rated output at class 0.5.
• 10 VA rated output at class 1.
• 12.5 VA rated output at class 3.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• FS 5 overcurrent limiting factor.
• Closed-core through-primary construction for cable and busbar installations.

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-4 600 converts a nominal 600 A primary current into a 5 A secondary current. Its class 0.5 accuracy, generous conductor aperture and closed-core through-primary construction make it suitable for accurate indirect current measurement in commercial and industrial electrical distribution, power monitoring and energy management systems.

Typical Applications

• Electrical energy metering systems.
• Commercial and industrial distribution panels.
• Electrical switchboards and control cabinets.
• Indirect measurement of circuits with a 600 A nominal current.
• Energy monitoring and management systems.
• Current measurement with compatible ammeters, multimeters and energy meters.
• Cable and busbar current measurement.
• Panel-building and electrical instrumentation applications.