Why Choose the ABB CT1M-S-80 400 Current Transformer?
The ABB CT1M-S-80 400 is a reliable 400/5 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 the primary current into a standardised 5 A secondary current suitable for connection to compatible meters and electrical measuring instruments.
Designed in accordance with IEC 61869-2, the CT1M-S-80 400 provides a best accuracy class of 0.5 for dependable electrical measurement. Its through-primary construction is designed for busbar conductors, making it suitable for switchboards, distribution panels and energy-monitoring installations where indirect current measurement is required.
With a rated primary current of 400 A, rated secondary current of 5 A and rated frequency of 50–60 Hz, the CT1M-S-80 400 provides rated outputs of 2.5 VA at Class 0.5, 3.75 VA at Class 1 and 5 VA at Class 3. The CT1M-S-80 format accommodates a vertical busbar section up to 85 × 55 mm, providing ample conductor clearance for electrical distribution applications.
Key Advantages
- Reliable 400/5 A current transformation for indirect electrical measurement.
- Best accuracy class 0.5 for precise metering applications.
- 2.5 VA rated output at Class 0.5.
- Designed in accordance with IEC 61869-2.
- Through-primary design suitable for busbar installations.
- Large opening accommodates a vertical busbar section up to 85 × 55 mm.
- IP20 protection rating for installation within suitable electrical enclosures.
Key Features
- ABB CT1M-S-80 current transformer series.
- 400 A rated primary current.
- 5 A rated secondary current.
- 400/5 A transformation ratio.
- Accuracy class 0.5 with 2.5 VA rated output.
- 3.75 VA rated output at Class 1.
- 5 VA rated output at Class 3.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary construction for indirect electrical measurement.
Reliable Current Measurement for Electrical Metering
Current transformers allow measuring equipment to monitor electrical current without routing the full primary current directly through the measuring instrument. The ABB CT1M-S-80 400 converts a 400 A primary current proportionally to a standard 5 A secondary signal, enabling compatible ammeters, multifunction meters and energy meters to perform indirect electrical measurement.
The CT1M range is designed for electrical distribution and energy-efficiency applications where accurate and dependable current measurement is required. The CT1M-S-80 through-primary format provides a generous busbar opening, while its defined accuracy classes and VA ratings allow the transformer to be matched appropriately to compatible metering circuits.
Typical Applications
- Electrical energy metering systems.
- Low-voltage distribution switchboards.
- Industrial electrical distribution panels.
- Indirect current measurement with ammeters.
- Multifunction electrical measuring instruments.
- Energy monitoring and management systems.
- Commercial and industrial busbar installations.
