Why Choose the ABB CT1M-12 3000 Current Transformer?
The ABB CT1M-12 3000 is a high-capacity 3000/5 A current transformer designed for indirect measurement of electrical current in low-voltage metering and energy-monitoring systems. As part of the ABB CT1M current transformer series, it transforms a high primary current into a standardised 5 A secondary current suitable for compatible ammeters, multifunction meters and energy meters.
Designed in accordance with IEC 61869-2, the CT1M-12 3000 provides a best accuracy class of 0.5 and an FS 10 instrument security factor. Its closed-core through-primary construction is designed for large busbar installations, making it particularly suitable for high-current switchboards, main distribution systems and industrial energy-monitoring applications.
With a rated primary current of 3000 A, rated secondary current of 5 A and rated frequency of 50–60 Hz, the CT1M-12 3000 provides dependable measurement for substantial electrical loads. It offers a rated output of 30 VA at Class 0.5 and 60 VA at Class 1 and Class 3, while its large through-primary opening accommodates a horizontal busbar section up to 125 × 93 mm.
Key Advantages
- High-capacity 3000/5 A current transformation for indirect electrical measurement.
- Best accuracy class 0.5 for precise metering applications.
- 30 VA rated output at Class 0.5 for compatible measuring circuits.
- Designed in accordance with IEC 61869-2.
- FS 10 instrument security factor for metering applications.
- Large through-primary opening suitable for high-current busbar installations.
- Busbar and mounting-foot fixings supplied as standard for convenient installation.
Key Features
- ABB CT1M-12 current transformer series.
- 3000 A rated primary current.
- 5 A rated secondary current.
- 3000/5 A transformation ratio.
- Accuracy class 0.5 with 30 VA rated output.
- 60 VA rated output at Class 1.
- 60 VA rated output at Class 3.
- 50–60 Hz rated frequency.
- FS 10 instrument security factor.
- IP20 protection rating.
- Through-primary construction with a 125 × 93 mm maximum horizontal busbar section.
Reliable Current Measurement for High-Current Distribution
Current transformers allow measuring equipment to monitor high electrical currents without routing the full primary current directly through the measuring instrument. The ABB CT1M-12 3000 converts a 3000 A primary current proportionally to a standard 5 A secondary signal, enabling compatible ammeters, multifunction meters and energy meters to perform indirect measurement safely and effectively.
The CT1M range is designed for electrical distribution and energy-efficiency applications where accurate and dependable current measurement is required. The CT1M-12 format provides a large through-primary opening for substantial busbars, while its defined accuracy classes and VA ratings make it suitable for demanding metering circuits in high-current commercial and industrial installations.
Typical Applications
- High-current electrical energy metering systems.
- Main low-voltage distribution switchboards.
- Industrial power-distribution panels.
- Indirect current measurement with ammeters.
- Multifunction electrical measuring instruments.
- Energy monitoring and management systems.
- Large commercial and industrial busbar installations.
