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2CSG221100R1101 ABB CT4/100 100/5A Current Transformer
ABB CT4/100 is a class 1 current transformer with a 100/5 A transformation ratio and 3 VA rated burden for indirect AC current measurement with compatible metering instruments.
£87.41
Why Choose the ABB CT4/100 Current Transformer?
The ABB CT4/100 is a 100/5 A current transformer designed to convert high primary currents into a proportional 5 A secondary current suitable for compatible electrical measuring and metering instruments. Supplied under ABB order code 2CSG221100R1101, it belongs to the ABB CT4 range of metering current transformers.
With a rated primary current of 100 A, a 5 A secondary and accuracy class 1, the CT4/100 provides a practical solution for indirect current measurement in commercial and industrial electrical distribution systems. Its rated measuring burden is 3 VA, supporting dependable measurement when correctly matched with the connected instrument and secondary circuit.
The CT4 construction accommodates installation around a primary cable or busbar, with the range designed for conductors up to approximately 30 mm diameter or busbars around 40 × 10 mm. This makes the CT4/100 suitable for switchboards, metering panels and distribution equipment where direct connection of the measuring instrument to the primary current is impractical.
Key Advantages
- 100/5 A transformation ratio for indirect AC current measurement.
- Accuracy class 1 supports dependable metering and monitoring.
- 3 VA rated measuring burden.
- Standard 5 A secondary output for compatible measuring instruments.
- Suitable for installation around cables or busbars.
- Supports primary cables up to approximately 30 mm diameter.
- Suitable for busbars around 40 × 10 mm.
- ABB-designed metering accessory for professional electrical distribution applications.
Key Features
- ABB CT4 series current transformer.
- 100 A rated primary current.
- 5 A rated secondary current.
- 100/5 A transformation ratio.
- Accuracy class 1.
- 3 VA rated output.
- 50–60 Hz operating frequency.
- IP30 protection rating.
- Suitable for cable and busbar installation.
- Screw secondary connections.
Reliable Indirect Current Measurement for Metering Systems
Current transformers allow measuring instruments to monitor electrical circuits carrying currents above their direct-input capability. The ABB CT4/100 converts a primary current of up to 100 A into a proportional 5 A secondary signal, allowing compatible meters and measuring instruments to obtain current information without carrying the full primary circuit current through the instrument.
Correct current-transformer selection is important for measurement accuracy. The CT4/100 combines a 100/5 A ratio, class 1 accuracy and a 3 VA measuring burden with a through-primary format suitable for cables and busbars, making it a practical choice for electrical metering, load monitoring and energy-management installations.
Typical Applications
- Electrical energy metering systems.
- Indirect current measurement up to 100 A.
- Commercial and industrial switchboards.
- Electrical distribution and metering panels.
- Load and consumption monitoring systems.
- Compatible ammeters, multifunction meters and energy meters with 5 A CT inputs.
Technical Specifications
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| Rated Burden (VA) | 3 VA | |
|---|---|---|
| Device Type | Solid-core CT | |
| Rated Primary Current (A) | 100 A | |
| Secondary Current / Output | 5 A | |
| Aperture (mm) | 30 mm | |
| Accuracy Class | Class 1 | |
| Series | CT4 | |
| ABB order code | 2CSG221100R1101 | |
| Product type | Current transformer | |
| Rated primary current | 100 A | |
| Rated secondary current | 5 A | |
| Transformation ratio | 100/5 A | |
| Accuracy class | Class 1 | |
| Rated measuring burden | 3 VA | |
| Operating frequency | 50–60 Hz | |
| Protection rating | IP30 | |
| Operating temperature | −5 to +50 °C | |
| Primary conductor | Cable or busbar | |
| Maximum cable diameter | approx. 30 mm | |
| Busbar capacity | approx. 40 × 10 mm | |
| Secondary connection | Screw connection | |
| Dimensions | approx. 70 × 80 × 105 mm | |
| EAN | 8012542603603 | |
| Product group | Metering Accessories |
Frequently Asked Questions
What is the ABB CT4/100 used for?
The ABB CT4/100 is a current transformer used to convert primary currents up to 100 A into a proportional 5 A secondary current for compatible metering and measuring instruments.
What is the transformation ratio of the ABB CT4/100?
The CT4/100 has a transformation ratio of 100/5 A, meaning its rated primary current is 100 A and its rated secondary current is 5 A.
What accuracy class is the ABB CT4/100?
The ABB CT4/100 has accuracy class 1 with a rated measuring burden of 3 VA.
Can the CT4/100 be installed around a busbar?
Yes. The CT4/100 is suitable for cable or busbar installation and accommodates busbars of approximately 40 × 10 mm as well as cables up to approximately 30 mm diameter.
What is the ABB order code for the CT4/100?
The ABB order code for the CT4/100 100/5 A current transformer is 2CSG221100R1101.
Trusted ABB Metering Technology
ABB current transformers provide a practical means of converting higher primary currents into standard secondary signals for compatible metering equipment, supporting dependable current measurement, energy monitoring and load analysis across electrical distribution systems.
