2CSG280815R1000 ABB CT1M-S-80 1000 Current Transformer 1000 A/5 A

Why Choose the ABB CT1M-S-80 1000 Current Transformer?

The ABB CT1M-S-80 1000, order code 2CSG280815R1000, is a 1000 A/5 A split-core 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 nominal 1000 A primary current into a standardised 5 A secondary current for compatible electricity meters, network analysers and measuring instruments.

The ABB CT1M-S-80 series combines a through-primary measurement arrangement with split-core construction, allowing the transformer to be fitted around an existing busbar. This makes the range particularly useful for retrofit metering and monitoring installations where disconnecting or removing the primary conductor would be inconvenient.

With a 1000 A rated primary current, 5 A rated secondary current and accuracy class 0.5, the CT1M-S-80 1000 provides a 1000:5 transformation ratio for accurate indirect electrical measurement. It delivers 10 VA at class 0.5, 15 VA at class 1 and 20 VA at class 3, while its CT1M-S-80 aperture accommodates vertical busbars up to 85 × 55 mm.

Key Advantages

• Split-core construction simplifies installation around existing busbars.
• 1000 A/5 A current ratio for compatible metering and monitoring equipment.
• Accuracy class 0.5 supports accurate current and energy measurement.
• 10 VA rated output at class 0.5 for metering applications.
• Large through-primary opening accommodates vertical busbars up to 85 × 55 mm.
• FS 10 current limiting factor for metering applications.
• Well suited to retrofit energy monitoring and existing electrical distribution installations.

Key Features

• ABB CT1M-S-80 current transformer series.
• Split-core through-primary construction.
• 1000 A rated primary current.
• 5 A rated secondary current.
• 1000:5 current transformation ratio.
• Accuracy class 0.5.
• 10 VA rated output at class 0.5.
• 15 VA rated output at class 1.
• 20 VA rated output at class 3.
• FS 10 current limiting factor.
• 50–60 Hz rated frequency.
• IP20 protection rating.
• Designed for vertical busbar installations.

Practical Split-Core Measurement for Existing Electrical Installations

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-S-80 1000 combines this measurement principle with a split-core design, making it particularly useful for retrofit metering, maintenance and extensions to existing electrical systems. Its 1000 A/5 A ratio, class 0.5 accuracy and 85 × 55 mm vertical busbar opening provide a practical solution for high-current energy metering and monitoring applications.

Typical Applications

• Electrical energy metering systems.
• Commercial and industrial power distribution installations.
• Main and sub-distribution switchboards.
• Indirect measurement of circuits with a 1000 A nominal current.
• Energy monitoring and management systems.
• Current measurement with compatible network analysers, meters and instrumentation.
• Retrofit current measurement on existing vertical busbars.
• Industrial panel-building, maintenance and electrical instrumentation applications.