2CSG280365R1000 ABB CT1M-5 1000 1000/5A Current Transformer

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.