Why Choose the ABB CT1M-8 800 Current Transformer?
The ABB CT1M-8 800 is a reliable 800/5 A current transformer designed for indirect measurement of electrical current in low-voltage metering and energy-monitoring systems. As part of the ABB CT1M current transformer series, it transforms high primary currents into a standardised 5 A secondary current suitable for connection to compatible meters and measuring instruments.
Designed in accordance with IEC 61869-2, the CT1M-8 800 provides a best accuracy class of 0.5 and supports metering applications where dependable current transformation is required. Its through-primary construction accommodates either a cable or busbar, making it suitable for electrical distribution boards, switchboards and energy-monitoring installations.
With a rated primary current of 800 A, rated secondary current of 5 A and rated frequency of 50–60 Hz, the CT1M-8 800 is designed for high-current electrical measurement. It provides rated outputs of 15 VA at Class 0.5, 45 VA at Class 1 and 50 VA at Class 3, while the CT1M-8 frame accepts cables up to 73 mm and busbars up to 80 × 30 mm or 60 × 50 mm.
Key Advantages
- Reliable 800/5 A current transformation for indirect electrical measurement.
- Best accuracy class 0.5 for precise metering applications.
- Designed in accordance with IEC 61869-2.
- Through-primary design suitable for cable or busbar installations.
- Supports cables up to 73 mm through the primary opening.
- Busbar and mounting-foot fixings are supplied as standard for convenient installation.
Key Features
- ABB CT1M-8 current transformer series.
- 800 A rated primary current.
- 5 A rated secondary current.
- 800/5 A transformation ratio.
- Accuracy class 0.5 with 15 VA rated output.
- 45 VA rated output at Class 1.
- 50 VA rated output at Class 3.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary construction for indirect current measurement.
Reliable Current Measurement for Electrical Metering
Current transformers allow measuring equipment to monitor high electrical currents without routing the full primary current directly through the measuring instrument. The ABB CT1M-8 800 converts an 800 A primary current proportionally to a standard 5 A secondary signal, enabling compatible ammeters, multifunction meters and energy meters to perform indirect current measurement.
The CT1M range is designed for electrical distribution and energy-efficiency applications where accurate and dependable current measurement is required. The CT1M-8 through-primary format provides flexibility for both cable and busbar conductors, while its defined accuracy classes and VA ratings allow the transformer to be selected for the requirements of the connected metering circuit.
Typical Applications
- Electrical energy metering systems.
- Industrial switchboards and distribution panels.
- Indirect current measurement with ammeters.
- Multifunction electrical measuring instruments.
- Energy monitoring and management systems.
- Commercial and industrial power-distribution installations.
