Why Choose the ABB CT1M-6 300 Current Transformer?
The ABB CT1M-6 300 is a through-primary 300/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280425R1000, it transforms a rated primary current of 300 A into a proportional 5 A secondary current for compatible ammeters, multifunction meters, energy meters and monitoring equipment.
Part of ABB's CT1M current-transformer range, the CT1M-6 300 is designed in accordance with IEC 61869-2. It provides a best accuracy class of 0.5, with rated burdens of 2.5 VA at class 0.5, 7.5 VA at class 1 and 7.5 VA at class 3, supporting dependable current and energy measurement in commercial and industrial installations.
The CT1M-6 frame provides a generous through-primary opening, accommodating cables up to 65 mm diameter and busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm. With 126 × 104 × 45 mm dimensions, IP20 protection and a rated frequency of 50–60 Hz, it is well suited to switchboards and metering assemblies requiring flexible conductor accommodation.
Key Advantages
- 300/5 A transformation ratio for indirect AC current measurement.
- Best measurement accuracy of class 0.5.
- 2.5 VA rated burden at class 0.5.
- 7.5 VA rated burden at class 1.
- 7.5 VA rated burden at class 3.
- Standard 5 A secondary output for compatible electrical measuring instruments.
- Large through-primary opening accommodates substantial cables and busbars.
- FS 10 instrument security factor.
- Busbar and mounting-foot fixings are supplied as standard for the CT1M-6 series.
- Optional DIN rail mounting adapter provides additional installation flexibility.
Key Features
- ABB CT1M-6 series current transformer.
- 300 A rated primary current.
- 5 A rated secondary current.
- 300/5 A transformation ratio.
- Accuracy class 0.5.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- FS 10 overcurrent limiting factor.
- Through-primary, closed-core current-transformer construction.
- Maximum cable diameter of 65 mm.
- Suitable for busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm.
Reliable Indirect Current Measurement for Metering Systems
Current transformers enable electrical meters and measuring instruments to monitor circuits carrying currents beyond their direct-input capability. The ABB CT1M-6 300 converts a rated 300 A primary current into a proportional 5 A secondary current, providing a standardised signal for compatible energy meters, ammeters and multifunction measuring equipment.
With class 0.5 accuracy available at a 2.5 VA burden, the CT1M-6 300 supports dependable current and energy measurement. Its large through-primary opening provides flexibility for substantial cables and busbars, making it particularly useful in commercial and industrial distribution panels where conductor dimensions demand a larger CT aperture.
Typical Applications
- Indirect electrical current measurement up to 300 A.
- Energy meters with 5 A current-transformer inputs.
- Ammeters and multifunction electrical measuring instruments.
- Commercial and industrial switchboards.
- Electrical distribution and metering panels.
- Large-cable and busbar metering installations.
- Energy monitoring and load-analysis systems.
