Why Choose the ABB CT1M-2 300 Current Transformer?
The ABB CT1M-2 300 is a through-primary 300/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280295R1000, it transforms a rated primary current of 300 A into a proportional 5 A secondary current for compatible energy meters, ammeters and multifunction measuring instruments.
Part of ABB's CT1M solid-core current-transformer range, the CT1M-2 300 is designed in accordance with IEC 61869-2 for professional metering applications. This model offers a best accuracy class of 0.5, with a rated burden of 5 VA at class 0.5, 5 VA at class 1 and 7.5 VA at class 3.
The CT1M-2 300 combines its 300 A primary rating with a compact 65 × 45 × 40 mm enclosure. Its solid-core, through-primary construction is suitable for new switchboards, metering panels and electrical distribution systems where accurate indirect current measurement is required.
Key Advantages
- 300/5 A transformation ratio for indirect AC current measurement.
- Best measurement accuracy of class 0.5.
- 5 VA rated burden at class 0.5.
- 5 VA rated burden at class 1.
- 7.5 VA rated burden at class 3.
- Standard 5 A secondary output for compatible electrical measuring instruments.
- Solid-core through-primary construction for dependable metering installations.
- Designed in accordance with IEC 61869-2.
Key Features
- ABB CT1M-2 series current transformer.
- 300 A rated primary current.
- 5 A rated secondary current.
- 300/5 A current transformation ratio.
- Accuracy class 0.5.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Solid-core, through-primary design.
- Compact 65 × 45 × 40 mm dimensions.
- Designed for indirect measurement of electrical network parameters.
Reliable Indirect Current Measurement for Metering Systems
Current transformers allow meters and measuring instruments to monitor circuits carrying currents substantially above their direct-input capability. The ABB CT1M-2 300 converts a rated 300 A primary current into a proportional 5 A secondary signal, providing a standard input for compatible electrical metering and monitoring equipment.
With class 0.5 accuracy available at a 5 VA burden, the CT1M-2 300 is well suited to applications requiring dependable energy and current measurement. Its compact solid-core construction and IEC 61869-2 design make it a practical choice for new commercial and industrial switchboards, load-monitoring systems and energy-management installations.
Typical Applications
- Indirect electrical current measurement up to 300 A.
- Energy meters with 5 A current-transformer inputs.
- Ammeters and multifunction measuring instruments.
- Commercial and industrial switchboards.
- Electrical distribution and metering panels.
- Energy monitoring and load-analysis systems.
