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2CSG280385R1000 ABB CT1M-4 400 Current Transformer 400/5 A
ABB CT1M-4 400 2CSG280385R1000 is a class 0.5 through-primary current transformer with a 400 A primary rating, 5 A secondary output and 5 VA class 0.5 rated output for indirect electrical metering applications.
£43.56
Why Choose the ABB CT1M-4 400 Current Transformer?
The ABB CT1M-4 400 is a compact and reliable 400/5 A current transformer designed for indirect measurement of electrical parameters in low-voltage distribution systems. Supplied under ABB order code 2CSG280385R1000, it forms part of the ABB CT1M current transformer series and is designed in accordance with IEC 61869-2.
With a rated primary current of 400 A and a rated secondary current of 5 A, the CT1M-4 400 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 5 VA rated output at class 0.5 support accurate electrical measurement in commercial and industrial installations.
The CT1M-4 400 uses a through-primary design suitable for cables and busbars. The CT1M-4 format accommodates cables up to 31 mm and horizontal or vertical busbars up to 40 × 10 mm or 30 × 20 mm. Its compact 78 × 62 × 40 mm construction, 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 400/5 A current transformation for indirect electrical measurement.
- Class 0.5 accuracy supports precise metering applications.
- 5 VA rated output at accuracy class 0.5.
- Standard 5 A secondary output for compatible measuring equipment.
- Through-primary construction simplifies installation around cables and busbars.
- Accommodates cables up to 31 mm.
- Suitable for horizontal and vertical busbars up to 40 × 10 mm or 30 × 20 mm.
- Busbar and mounting-foot fixings are supplied as standard.
- Optional DIN-rail installation using the CT1M-4/5/6/7 DIN Rail Adapter.
- Designed in accordance with IEC 61869-2 for current transformers.
Key Features
- ABB CT1M-4 current transformer series.
- 400 A rated primary current.
- 5 A rated secondary current.
- 400/5 A transformation ratio.
- Class 0.5 measurement accuracy.
- 5 VA rated output at class 0.5.
- 5 VA rated output at class 1.
- 7.5 VA rated output at class 3.
- 50–60 Hz rated frequency.
- IP20 degree of protection.
- Compact through-primary construction for cable and busbar installations.
Reliable Indirect Current Measurement
Current transformers allow electrical meters and monitoring instruments to measure circuits carrying currents above their direct-input range. The ABB CT1M-4 400 transforms a primary current of up to 400 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 electrical distribution systems. The CT1M-4 400 combines class 0.5 accuracy with a practical through-primary opening for cables and busbars, while its standardised 5 A secondary output supports integration with compatible 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.
- Busbar current measurement applications.
Technical Specifications
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| Rated Burden (VA) | 5 VA | |
|---|---|---|
| Rated Primary Current (A) | 400 A | |
| Secondary Current / Output | 5 A | |
| Aperture (mm) | 31 mm | |
| Accuracy Class | Class 0.5 | |
| Device Type | Solid-core CT | |
| Series | CT1M-4 | |
| ABB order code | 2CSG280385R1000 | |
| Product group | Metering Accessories | |
| Product type | Current transformer | |
| Rated primary current | 400 A | |
| Rated secondary current | 5 A | |
| Transformation ratio | 400/5 A | |
| Best accuracy class | 0.5 | |
| Rated output, class 0.5 | 5 VA | |
| Rated output, class 1 | 5 VA | |
| Rated output, class 3 | 7.5 VA | |
| Rated frequency | 50–60 Hz | |
| Protection rating | IP20 | |
| Mounting type | Through primary | |
| Maximum cable diameter | 31 mm | |
| Horizontal busbar sizes | 40 × 10 mm / 30 × 20 mm | |
| Vertical busbar sizes | 40 × 10 mm / 30 × 20 mm | |
| DIN-rail mounting | Optional with CT1M-4/5/6/7 DIN Rail Adapter | |
| Dimensions (H × W × D) | 78 × 62 × 40 mm | |
| Weight | 0.42 kg | |
| Standard | IEC 61869-2 | |
| EAN | 8012542803850 |
Frequently Asked Questions
What is the ABB CT1M-4 400 used for?
The ABB CT1M-4 400 is a current transformer designed to convert primary circuit current into a proportional 5 A secondary current for indirect electrical metering and network measurement.
What is the current ratio of the ABB CT1M-4 400?
The CT1M-4 400 has a rated transformation ratio of 400/5 A, with a 400 A rated primary current and a 5 A rated secondary current.
What accuracy class does the CT1M-4 400 provide?
The ABB CT1M-4 400 provides a best accuracy class of 0.5, with a rated output of 5 VA at class 0.5.
What conductor sizes can the CT1M-4 400 accommodate?
The CT1M-4 through-primary format accommodates cables up to 31 mm and horizontal or vertical busbars up to 40 × 10 mm or 30 × 20 mm.
Can the ABB CT1M-4 400 be mounted on a DIN rail?
Yes. DIN-rail mounting is available using the optional CT1M-4/5/6/7 DIN Rail Adapter, while busbar and mounting-foot fixings are supplied as standard.
Trusted ABB Current Measurement Technology
ABB CT1M current transformers provide dependable conversion of primary currents into standard 5 A secondary signals, supporting accurate indirect measurement in commercial, industrial and electrical distribution applications.
