Why Choose the ABB CT1M-6 1200 Current Transformer?
The ABB CT1M-6 1200 is a through-primary 1200/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280485R1000, it transforms a rated primary current of 1200 A into a proportional 5 A secondary current for compatible energy meters, ammeters and multifunction measuring instruments.
Part of ABB's CT1M current-transformer range, the CT1M-6 1200 is designed in accordance with IEC 61869-2. It provides a best accuracy class of 0.5, with rated burdens of 20 VA at class 0.5, 30 VA at class 1 and 30 VA at class 3, making it suitable for demanding high-current metering and monitoring applications.
The CT1M-6 frame provides a large through-primary aperture capable of 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, the CT1M-6 1200 is well suited to commercial and industrial switchboards, distribution panels and metering assemblies.
Key Advantages
- 1200/5 A transformation ratio for indirect high-current measurement.
- Best measurement accuracy of class 0.5.
- 20 VA rated burden at class 0.5.
- 30 VA rated burden at class 1.
- 30 VA rated burden at class 3.
- FS 5 current limiting factor.
- Standard 5 A secondary output for compatible measuring equipment.
- Large through-primary opening for substantial cables and busbars.
- Busbar and mounting-foot fixings are supplied as standard.
- Optional CT1M-4/5/6/7 DIN rail mounting adapter provides additional installation flexibility.
Key Features
- ABB CT1M-6 series current transformer.
- 1200 A rated primary current.
- 5 A rated secondary current.
- 1200/5 A current transformation ratio.
- Accuracy class 0.5.
- FS 5 current limiting factor.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary 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 High-Current Metering
Current transformers allow electrical measuring equipment to monitor circuits carrying currents beyond the direct-input capability of conventional meters. The ABB CT1M-6 1200 converts a rated 1200 A primary current into a proportional 5 A secondary current, providing a standardised signal for compatible energy meters, ammeters and multifunction monitoring equipment.
With class 0.5 accuracy available at a substantial 20 VA burden, the CT1M-6 1200 supports dependable measurement in high-current distribution systems. Its generous through-primary opening accommodates large cables and busbars, while standard busbar and mounting-foot fixings and the availability of an optional DIN rail adapter provide flexible integration into electrical assemblies.
Typical Applications
- Indirect electrical current measurement up to 1200 A.
- Energy meters with 5 A current-transformer inputs.
- Ammeters and multifunction electrical measuring instruments.
- Main commercial and industrial switchboards.
- High-current electrical distribution panels.
- Large-cable and busbar metering installations.
- Energy monitoring and load-analysis systems.
