Why Choose the ABB CT1M-8 1200 Current Transformer?
The ABB CT1M-8 1200 is a closed-core 1200/5 A current transformer designed for indirect measurement of electrical parameters in higher-current low-voltage distribution systems. Supplied under ABB order code 2CSG280555R1000, 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 1200 A and a rated secondary current of 5 A, the CT1M-8 1200 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 30 VA rated output at class 0.5 support accurate electrical measurement in demanding commercial and industrial installations.
The CT1M-8 1200 uses a through-primary design with a generous opening for large conductors. It accommodates cables up to 73 mm and horizontal or vertical busbars up to 80 × 30 mm or 60 × 50 mm. Its 155 × 140 × 45 mm enclosure, IP20 degree of protection and 50–60 Hz rated frequency make it suitable for switchboards, distribution panels and energy monitoring systems.
Key Advantages
- Reliable 1200/5 A current transformation for high-current indirect electrical measurement.
- Class 0.5 accuracy supports precise metering applications.
- 30 VA rated output at accuracy class 0.5.
- Provides 60 VA rated output at class 1 and class 3.
- Standard 5 A secondary output for compatible measuring equipment.
- FS 5 current limiting function for metering applications.
- Large through-primary opening accommodates cables up to 73 mm.
- Suitable for horizontal and vertical busbars up to 80 × 30 mm or 60 × 50 mm.
- Busbar and mounting-foot fixings are supplied as standard.
- Designed in accordance with IEC 61869-2 for current transformers.
Key Features
- ABB CT1M-8 closed-core current transformer.
- 1200 A rated primary current.
- 5 A rated secondary current.
- 1200/5 A transformation ratio.
- Class 0.5 measurement accuracy.
- 30 VA rated output at class 0.5.
- 60 VA rated output at class 1.
- 60 VA rated output at class 3.
- FS 5 current limiting function.
- 50–60 Hz rated frequency.
- IP20 degree of protection.
- Through-primary construction for large cable and busbar installations.
Current transformers enable meters and monitoring instruments to measure circuits carrying currents substantially above their direct-input range. The ABB CT1M-8 1200 transforms a primary current of 1200 A into a proportional 5 A secondary current, allowing compatible equipment to perform indirect measurement of electrical network parameters.
The CT1M-8 1200 combines class 0.5 accuracy with a substantial 30 VA class 0.5 output and a large through-primary opening for cables and busbars. Its ability to provide up to 60 VA at classes 1 and 3 makes it well suited to high-current distribution boards, industrial switchgear and energy monitoring installations requiring a standard 5 A measuring signal.
Typical Applications
- High-current electrical energy metering systems.
- Main low-voltage distribution switchboards.
- Industrial power 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.
