Why Choose the ABB CT1M-2 100 Current Transformer?
The ABB CT1M-2 100 is a compact and reliable 100/5 A current transformer designed for indirect measurement of electrical network parameters in low-voltage distribution systems. Supplied under ABB order code 2CSG280255R1000, it forms part of the ABB CT1M current transformer series and complies with IEC 61869-2.
With a rated primary current of 100 A and a rated secondary current of 5 A, the CT1M-2 100 converts the primary circuit current into a proportional standard secondary signal for compatible electricity meters, ammeters, power analysers and monitoring equipment. Its class 0.5 accuracy supports precise electrical measurement in commercial and industrial installations.
The CT1M-2 100 uses a through-primary design suitable for cable and horizontal busbar installations. Its compact 45 × 65 × 40 mm enclosure, IP20 degree of protection and 50–60 Hz rated frequency make it a practical metering accessory for switchboards, distribution panels and energy monitoring systems.
Key Advantages
- Reliable 100/5 A current transformation for indirect electrical measurement.
- Class 0.5 accuracy supports precise metering applications.
- 1.5 VA burden at accuracy class 0.5.
- Standard 5 A secondary output for compatible measuring equipment.
- Through-primary construction simplifies installation around the primary conductor.
- Suitable for cable and horizontal busbar applications.
- Compact 45 × 65 × 40 mm dimensions minimise panel space requirements.
- Designed in accordance with IEC 61869-2 for current transformers.
Key Features
- ABB CT1M-2 current transformer series.
- 100 A rated primary current.
- 5 A rated secondary current.
- 100/5 A transformation ratio.
- Class 0.5 measurement accuracy.
- 1.5 VA rated output at class 0.5.
- FS 5 current limiting factor.
- 50–60 Hz rated frequency.
- IP20 degree of protection.
- Through-primary mounting configuration.
- Suitable for conductors up to 21 mm and busbars up to 20 × 10 mm.
Current transformers allow electrical meters and monitoring instruments to measure circuits carrying currents above their direct-input range. The ABB CT1M-2 100 transforms a primary current of up to 100 A into a proportional 5 A secondary current, allowing compatible equipment to perform indirect measurement of electrical network parameters.
The CT1M range is designed for current measurement in main and sub-distribution systems. Its compact through-primary construction enables the primary cable or busbar to pass through the transformer, while the standardised secondary output can be connected to suitable metering and monitoring equipment.
Typical Applications
- Electrical energy metering systems.
- Main and sub-distribution switchboards.
- Low-voltage electrical distribution panels.
- Power and network monitoring systems.
- Building energy management installations.
- Industrial electrical measurement systems.
- Panel-mounted ammeters and power analysers.
- Commercial and industrial energy monitoring.
