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2CSG280355R1000 ABB CT1M-4 800 800/5A Current Transformer
ABB CT1M-4 800 is an IEC 61869-2 through-primary current transformer with an 800/5 A ratio, class 0.5 accuracy and 10 VA class 0.5 burden for indirect electrical measurement.
£43.56
Why Choose the ABB CT1M-4 800 Current Transformer?
The ABB CT1M-4 800 is a through-primary 800/5 A current transformer designed for indirect measurement of electrical network parameters. Supplied under ABB order code 2CSG280355R1000, it transforms a rated primary current of 800 A into a proportional 5 A secondary current for compatible energy meters, ammeters and multifunction measuring instruments.
Part of ABB's CT1M current-transformer range, the CT1M-4 800 is designed in accordance with IEC 61869-2. It provides a best accuracy class of 0.5, with rated burdens of 10 VA at class 0.5, 10 VA at class 1 and 12.5 VA at class 3, supporting dependable current and energy measurement in commercial and industrial installations.
The CT1M-4 format accommodates cables up to 31 mm and horizontal or vertical busbars up to 40 × 10 mm or 30 × 20 mm. With compact 78 × 62 × 40 mm dimensions, IP20 protection and a rated frequency of 50–60 Hz, the CT1M-4 800 is well suited to switchboards, distribution panels and energy-metering assemblies.
Key Advantages
- 800/5 A transformation ratio for indirect AC current measurement.
- Best measurement accuracy of class 0.5.
- 10 VA rated burden at class 0.5.
- 10 VA rated burden at class 1.
- 12.5 VA rated burden at class 3.
- Standard 5 A secondary output for compatible metering equipment.
- Suitable for cables and both horizontal and vertical busbars.
- Busbar and mounting-foot fixings supplied as standard.
- Optional DIN rail mounting adapter available for flexible panel installation.
- Designed in accordance with IEC 61869-2.
Key Features
- ABB CT1M-4 series current transformer.
- 800 A rated primary current.
- 5 A rated secondary current.
- 800/5 A transformation ratio.
- Accuracy class 0.5.
- 50–60 Hz rated frequency.
- IP20 protection rating.
- Through-primary current-transformer construction.
- Maximum cable diameter of 31 mm.
- Supports horizontal and vertical busbars up to 40 × 10 mm or 30 × 20 mm.
- Compact 78 × 62 × 40 mm construction.
Reliable Indirect Current Measurement for High-Current Metering
Current transformers allow electrical measuring instruments to monitor circuits carrying currents well beyond their direct-input capability. The ABB CT1M-4 800 converts a rated 800 A primary current into a proportional 5 A secondary current, providing a standardised signal for compatible energy meters, ammeters and multifunction monitoring equipment.
With class 0.5 accuracy available at a substantial 10 VA burden, the CT1M-4 800 is suited to demanding electrical metering and load-monitoring installations. Its through-primary design supports both cables and busbars, while supplied mounting-foot and busbar fixings plus an optional DIN rail adapter provide flexibility when integrating the transformer into new electrical distribution assemblies.
Typical Applications
- Indirect electrical current measurement up to 800 A.
- Energy meters with 5 A current-transformer inputs.
- Ammeters and multifunction electrical measuring instruments.
- Main and sub-distribution switchboards.
- Commercial and industrial electrical distribution systems.
- Busbar-based metering installations.
- Energy monitoring and load-analysis systems.
Technical Specifications
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| Rated Burden (VA) | 10 VA | |
|---|---|---|
| Rated Primary Current (A) | 800 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 | 2CSG280355R1000 | |
| Product type | Through-primary current transformer | |
| Rated primary current | 800 A | |
| Rated secondary current | 5 A | |
| Transformation ratio | 800/5 A | |
| Best accuracy class | Class 0.5 | |
| Rated burden at class 0.5 | 10 VA | |
| Rated burden at class 1 | 10 VA | |
| Rated burden at class 3 | 12.5 VA | |
| Rated frequency | 50–60 Hz | |
| Maximum cable diameter | 31 mm | |
| Horizontal busbar capacity | 40 × 10 mm or 30 × 20 mm | |
| Vertical busbar capacity | 40 × 10 mm or 30 × 20 mm | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | 78 × 62 × 40 mm | |
| Product weight | 0.48 kg | |
| Standard | IEC 61869-2 | |
| GTIN / EAN | 8012542803553 | |
| Pack quantity | 1 piece | |
| Product group | Metering Accessories |
Frequently Asked Questions
What is the ABB CT1M-4 800 used for?
The ABB CT1M-4 800 is a through-primary current transformer used to convert a rated primary current of 800 A into a proportional 5 A secondary current for compatible electrical metering and measuring equipment.
What is the transformation ratio of the ABB CT1M-4 800?
The CT1M-4 800 has a rated transformation ratio of 800/5 A.
What accuracy and burden does the CT1M-4 800 provide?
The CT1M-4 800 has a best accuracy class of 0.5, with rated burdens of 10 VA at class 0.5, 10 VA at class 1 and 12.5 VA at class 3.
What conductor sizes can the ABB CT1M-4 800 accommodate?
The CT1M-4 format accepts cables up to 31 mm diameter and horizontal or vertical busbars measuring up to 40 × 10 mm or 30 × 20 mm.
What is the ABB order code for the CT1M-4 800?
The ABB order code for the CT1M-4 800 current transformer is 2CSG280355R1000.
Trusted ABB Metering Technology
ABB CT1M current transformers provide standardised 5 A secondary signals for indirect electrical measurement, supporting accurate current monitoring, energy metering and load analysis across commercial and industrial electrical distribution systems.
