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2CSG280745R1000 ABB CT1M-S-30 250 Current Transformer 250/5 A
ABB CT1M-S-30 250 2CSG280745R1000 is a class 1 split-core current transformer with a 250 A primary rating, 5 A secondary output and 3.75 VA class 1 rated output for indirect electrical metering and retrofit monitoring applications.
£247.35
Why Choose the ABB CT1M-S-30 250 Current Transformer?
The ABB CT1M-S-30 250 is a 250/5 A current transformer designed for indirect measurement of electrical parameters in low-voltage distribution systems. Supplied under ABB order code 2CSG280745R1000, it forms part of the ABB CT1M-S-30 series and is designed in accordance with IEC 61869-2.
With a rated primary current of 250 A and a rated secondary current of 5 A, the CT1M-S-30 250 converts primary circuit current into a proportional standard secondary signal for compatible electricity meters, ammeters, power analysers and monitoring equipment. It provides class 1 accuracy with a 3.75 VA rated output and a 6.25 VA rated output at class 3.
The CT1M-S-30 250 features a split-core design that simplifies installation around existing conductors without requiring the primary conductor to be disconnected. Its compact 106 × 93 × 40 mm dimensions, IP20 degree of protection and 50–60 Hz rated frequency make it a practical solution for switchboards, distribution panels, retrofit projects and energy monitoring installations.
Key Advantages
- Reliable 250/5 A current transformation for indirect electrical measurement.
- Split-core construction simplifies installation and retrofit applications.
- Class 1 accuracy for metering and monitoring applications.
- 3.75 VA rated output at accuracy class 1.
- 6.25 VA rated output at accuracy class 3.
- Standard 5 A secondary output for compatible measuring equipment.
- FS 10 instrument security factor.
- Compact 106 × 93 × 40 mm dimensions for panel installations.
- IP20 degree of protection for installation within suitable electrical enclosures.
- Designed in accordance with IEC 61869-2 for instrument current transformers.
Key Features
- ABB CT1M-S-30 split-core current transformer.
- 250 A rated primary current.
- 5 A rated secondary current.
- 250/5 A transformation ratio.
- Class 1 best accuracy class.
- 3.75 VA rated output at class 1.
- 6.25 VA rated output at class 3.
- FS 10 instrument security factor.
- 50–60 Hz rated frequency.
- IP20 degree of protection.
- Primary opening suitable for conductors up to 33 × 23 mm.
Convenient Split-Core Current Measurement
Current transformers allow electricity meters and monitoring instruments to measure circuits carrying currents above their direct-input range. The ABB CT1M-S-30 250 transforms a primary current of 250 A into a proportional 5 A secondary current, providing a standard signal for compatible measuring equipment.
The split-core construction is particularly useful for retrofit projects because the transformer can be installed around an existing conductor without disconnecting the primary circuit conductor. Combined with its class 1 measurement performance and compact dimensions, the CT1M-S-30 250 is well suited to upgrading existing switchboards with energy metering and electrical monitoring equipment.
Typical Applications
- Electrical energy metering systems.
- Retrofit energy monitoring projects.
- Low-voltage distribution switchboards.
- Commercial electrical distribution panels.
- Industrial power monitoring systems.
- Building energy management installations.
- Panel-mounted ammeters and power analysers.
- Indirect measurement of 250 A electrical circuits.
Technical Specifications
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| Rated Burden (VA) | 3.75 VA | |
|---|---|---|
| Device Type | Solid-core CT | |
| Rated Primary Current (A) | 250 A | |
| Secondary Current / Output | 5 A | |
| Accuracy Class | Class 1 | |
| Series | CT1M-S-30 | |
| ABB order code | 2CSG280745R1000 | |
| Product group | Metering Accessories | |
| Product type | Split-core current transformer | |
| Rated primary current | 250 A | |
| Rated secondary current | 5 A | |
| Transformation ratio | 250/5 A | |
| Best accuracy class | 1 | |
| Rated output, class 1 | 3.75 VA | |
| Rated output, class 3 | 6.25 VA | |
| Instrument security factor | FS 10 | |
| Number of primary inputs | 1 | |
| Rated frequency | 50–60 Hz | |
| Protection rating | IP20 | |
| Primary opening | 33 × 23 mm | |
| Dimensions (H × W × D) | 106 × 93 × 40 mm | |
| Weight | 0.86 kg | |
| Standard | IEC 61869-2 | |
| GTIN / EAN | 8012542807452 |
Frequently Asked Questions
What is the ABB CT1M-S-30 250 used for?
The ABB CT1M-S-30 250 is a current transformer used to convert a 250 A primary current into a proportional 5 A secondary current for indirect electrical metering and network measurement.
What is the current ratio of the ABB CT1M-S-30 250?
The CT1M-S-30 250 has a rated transformation ratio of 250/5 A, with a 250 A rated primary current and a 5 A rated secondary current.
What accuracy and output does the CT1M-S-30 250 provide?
The ABB CT1M-S-30 250 has a best accuracy class of class 1, providing 3.75 VA at class 1 and 6.25 VA at class 3.
Is the ABB CT1M-S-30 250 a split-core current transformer?
Yes. The CT1M-S-30 250 uses a split-core construction, allowing it to be opened and fitted around an existing conductor, which is particularly useful for retrofit metering and monitoring installations.
What standard does the ABB CT1M-S-30 250 comply with?
The ABB CT1M-S-30 250 is designed in accordance with IEC 61869-2, the applicable standard for instrument current transformers.
Trusted ABB Current Measurement Technology
ABB CT1M current transformers provide dependable conversion of primary currents into standard 5 A secondary signals, supporting indirect electrical measurement in commercial, industrial and electrical distribution applications.
