Why Choose the ABB CT1M-2 50 Current Transformer?
The ABB CT1M-2 50, order code 2CSG280225R1000, is a compact 50 A/5 A current transformer designed for indirect measurement of electrical parameters in metering and energy monitoring applications. Part of ABB's Metering Accessories range, it transforms the primary circuit current into a standardised 5 A secondary current for compatible meters, network analysers and measuring instruments.
As part of the ABB CT1M current transformer series, the CT1M-2 50 is manufactured in accordance with IEC 61869-2 and uses a through-primary design. The monitored conductor passes through the transformer aperture, providing a straightforward current sensing solution for electrical distribution panels, switchboards and energy monitoring systems.
With a 50 A rated primary current, 5 A rated secondary current and accuracy class 1, the CT1M-2 50 provides a 50:5 transformation ratio for indirect electrical measurement. It offers a rated output of 1.5 VA at class 1, operates at 50–60 Hz and features an IP20 protection rating.
Key Advantages
- Compact current transformer designed for indirect electrical measurement.
- 50 A/5 A current ratio for compatible metering and monitoring equipment.
- Accuracy class 1 with a rated output of 1.5 VA.
- Through-primary construction provides straightforward installation around a compatible conductor.
- Designed in accordance with IEC 61869-2.
- Standard 5 A secondary output supports compatible electrical measuring instruments.
- Compact 65 × 45 × 40 mm dimensions suit electrical panels and switchboards.
Key Features
- ABB CT1M current transformer series.
- 50 A rated primary current.
- 5 A rated secondary current.
- 50:5 current transformation ratio.
- Accuracy class 1.
- 1.5 VA output at class 1.
- 2 VA output at class 3.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary current transformer design.
- IEC 61869-2 compliant CT1M series.
Reliable Indirect Measurement for Electrical Systems
Current transformers enable meters and measuring instruments to monitor electrical circuits carrying currents above their direct measurement range. The transformer produces a proportional secondary current, allowing electrical parameters to be measured without routing the full primary current through the connected measuring device.
The ABB CT1M-2 50 converts a nominal 50 A primary current into a 5 A secondary current. Its through-primary construction, class 1 accuracy and compact dimensions make it suitable for integrating indirect current measurement into commercial and industrial electrical distribution and energy monitoring systems.
Typical Applications
- Electrical energy metering systems.
- Commercial and industrial distribution panels.
- Electrical switchboards and control cabinets.
- Indirect current measurement applications.
- Energy monitoring and management systems.
- Current measurement with compatible network analysers and meters.
- Panel-building and electrical instrumentation applications.
