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.
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.
