2CSG280435R1000 ABB CT1M-6 400 Current Transformer 400/5 A

Why Choose the ABB CT1M-6 400 Current Transformer?

The ABB CT1M-6 400 is a reliable 400/5 A current transformer designed for indirect measurement of electrical parameters in low-voltage distribution systems. Supplied under ABB order code 2CSG280435R1000, it forms part of the ABB CT1M current transformer series and is designed in accordance with IEC 61869-2.

With a rated primary current of 400 A and a rated secondary current of 5 A, the CT1M-6 400 converts primary circuit current into a proportional standard secondary signal for compatible electricity meters, ammeters, power analysers and monitoring equipment. Its class 0.5 accuracy and 7.5 VA rated output at class 0.5 support accurate electrical measurement in commercial and industrial installations.

The CT1M-6 400 uses a through-primary design suitable for cables and busbars. Its large primary opening accommodates cables up to 65 mm and horizontal or vertical busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm. With compact construction, an IP20 degree of protection and a 50–60 Hz rated frequency, it provides a practical solution for higher-current metering installations.

Key Advantages

• Reliable 400/5 A current transformation for indirect electrical measurement.
• Class 0.5 accuracy supports precise metering applications.
• 7.5 VA rated output at accuracy class 0.5.
• Standard 5 A secondary output for compatible measuring equipment.
• Large through-primary opening accommodates cables up to 65 mm.
• Suitable for substantial horizontal and vertical busbars up to 80 × 10 mm, 60 × 30 mm or 50 × 50 mm.
• FS 5 current limiting factor for metering applications.
• Busbar and mounting-foot fixings are supplied as standard.
• Optional DIN-rail installation using the CT1M-4/5/6/7 DIN Rail Adapter.
• Designed in accordance with IEC 61869-2 for current transformers.

Key Features

• ABB CT1M-6 current transformer series.
• 400 A rated primary current.
• 5 A rated secondary current.
• 400/5 A transformation ratio.
• Class 0.5 measurement accuracy.
• 7.5 VA rated output at class 0.5.
• 10 VA rated output at class 1.
• 10 VA rated output at class 3.
• FS 5 current limiting factor.
• 50–60 Hz rated frequency.
• IP20 degree of protection.
• Through-primary construction for cable and busbar installations.

Reliable Indirect Current Measurement

Current transformers allow electrical meters and monitoring instruments to measure circuits carrying currents above their direct-input range. The ABB CT1M-6 400 transforms a primary current of up to 400 A into a proportional 5 A secondary current, allowing compatible equipment to perform indirect measurement of electrical network parameters.

The CT1M range is designed for current measurement in electrical distribution systems. The CT1M-6 400 combines class 0.5 accuracy with a generous through-primary opening for large cables and busbars, while its standardised 5 A secondary output supports integration with compatible metering and monitoring equipment.

Typical Applications

• Electrical energy metering systems.
• Main and sub-distribution switchboards.
• Low-voltage electrical distribution panels.
• Power and network monitoring systems.
• Building energy management installations.
• Industrial electrical measurement systems.
• Panel-mounted ammeters and power analysers.
• Large cable and busbar current measurement applications.