Why Choose the ABB CT1M-5 1000 Current Transformer?
The ABB CT1M-5 1000 is a through-primary 1000/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280365R1000, it transforms a rated primary current of 1000 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-5 1000 is manufactured in accordance with IEC 61869-2. It provides a best accuracy class of 0.5, with rated burdens of 12.5 VA at class 0.5, 15 VA at class 1 and 20 VA at class 3, providing strong measurement capability for high-current electrical distribution systems.
The CT1M-5 format provides a generous through-primary opening for conductors, accommodating cables up to 41 mm diameter and horizontal busbars up to 50 × 10 mm, 40 × 20 mm or 30 × 30 mm. Its 98 × 74 × 45 mm enclosure, IP20 protection and standard busbar and mounting-foot fixings make it suitable for professional switchboard and metering installations.
Key Advantages
- 1000/5 A transformation ratio for indirect high-current measurement.
- Best measurement accuracy of class 0.5.
- 12.5 VA rated burden at class 0.5.
- 15 VA rated burden at class 1.
- 20 VA rated burden at class 3.
- Standard 5 A secondary output for compatible electrical measuring instruments.
- Accommodates cables up to 41 mm diameter.
- Suitable for horizontal busbars up to 50 × 10 mm, 40 × 20 mm or 30 × 30 mm.
- Busbar and mounting-foot fixings supplied as standard.
- Optional CT1M-4/5/6/7 DIN rail mounting adapter available.
Key Features
- ABB CT1M-5 series current transformer.
- 1000 A rated primary current.
- 5 A rated secondary current.
- 1000/5 A current transformation ratio.
- Accuracy class 0.5.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary current-transformer construction.
- Suitable for cable or horizontal busbar primary conductors.
- Compact 98 × 74 × 45 mm enclosure.
- Designed for indirect measurement of electrical network parameters.
Reliable Indirect Current Measurement for High-Current Metering
High-current electrical circuits require current transformers to provide measuring instruments with a manageable and proportional secondary signal. The ABB CT1M-5 1000 converts a rated 1000 A primary current into a standard 5 A secondary current, enabling compatible meters and monitoring equipment to measure electrical parameters without carrying the full primary current through the instrument.
With class 0.5 accuracy at a substantial 12.5 VA burden, the CT1M-5 1000 is well suited to demanding energy-metering and load-monitoring applications. Its large through-primary opening accommodates substantial cables and busbars, while standard mounting fixings and an optional DIN rail adapter provide flexibility when integrating the transformer into electrical distribution assemblies.
Typical Applications
- Indirect electrical current measurement up to 1000 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.
- Busbar-based metering installations.
- Energy monitoring and load-analysis systems.
