2CSG280675R1000 ABB CT1M-12 4000 Current Transformer 4000/5 A

Why Choose the ABB CT1M-12 4000 Current Transformer?

The ABB CT1M-12 4000 is a through-primary 4000/5 A current transformer designed for indirect electrical measurement in high-current low-voltage distribution systems. Supplied under ABB order code 2CSG280675R1000, it forms part of the ABB CT1M current transformer range and is designed in accordance with IEC 61869-2.

With a rated primary current of 4000 A and a rated secondary current of 5 A, the CT1M-12 4000 converts high primary currents into a proportional standard secondary signal for compatible electricity meters, ammeters, power analysers and monitoring equipment. It provides class 0.5 accuracy with a 45 VA rated output, together with 60 VA rated outputs at classes 1 and 3.

The CT1M-12 4000 is specifically configured for substantial busbar installations, accepting a horizontal busbar section up to 125 × 93 mm. Its 206 × 225 × 50 mm enclosure, IP20 degree of protection and 50–60 Hz rated frequency make it a robust metering solution for main switchboards, industrial distribution assemblies and other high-current electrical systems.

Key Advantages

• High-capacity 4000/5 A current transformation for indirect electrical measurement.
• Class 0.5 accuracy supports precise metering applications.
• 45 VA rated output at accuracy class 0.5.
• 60 VA rated output at both class 1 and class 3.
• Standard 5 A secondary output for compatible measuring equipment.
• Large through-primary opening designed for substantial busbar systems.
• Accommodates a horizontal busbar section up to 125 × 93 mm.
• Busbar and mounting-foot fixings are supplied as standard.
• IP20 degree of protection for installation within suitable electrical enclosures.
• Designed in accordance with IEC 61869-2 for instrument current transformers.

Key Features

• ABB CT1M-12 through-primary current transformer.
• 4000 A rated primary current.
• 5 A rated secondary current.
• 4000/5 A transformation ratio.
• Class 0.5 measurement accuracy.
• 45 VA rated output at class 0.5.
• 60 VA rated output at class 1.
• 60 VA rated output at class 3.
• 50–60 Hz rated frequency.
• IP20 degree of protection.
• 125 × 93 mm maximum horizontal busbar section.
• Through-primary construction for high-current busbar installations.

Accurate Measurement of High-Current Busbar Systems

Current transformers enable electricity meters and monitoring instruments to measure circuits carrying currents far above their direct-input capability. The ABB CT1M-12 4000 transforms a primary current of 4000 A into a proportional 5 A secondary current, allowing compatible instrumentation to perform indirect measurement of electrical network parameters.

The CT1M-12 4000 combines class 0.5 accuracy with a substantial 45 VA class 0.5 output and a large 125 × 93 mm horizontal busbar opening. This makes it particularly suitable for high-capacity switchboards and industrial distribution systems where large busbars and a standard 5 A metering interface are required.

Typical Applications

• High-current electrical energy metering systems.
• Main low-voltage distribution switchboards.
• Large industrial power distribution assemblies.
• High-capacity busbar measurement systems.
• Power and network monitoring installations.
• Building and industrial energy management systems.
• Panel-mounted ammeters and power analysers.
• 4000 A feeder and distribution circuit measurement.