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1SDA073743R1 ABB Homopolar Toroid E1.2–E6.2 100 A
ABB 1SDA073743R1 is a 100 A homopolar toroid transformer for earth-fault current sensing with compatible Emax 2 E1.2–E6.2 and Tmax XT7/XT7M protection systems.
£1,847.80
Why Choose the ABB 1SDA073743R1 Homopolar Toroid?
The ABB 1SDA073743R1 is a 100 A homopolar toroid transformer designed for earth-fault protection applications with ABB low-voltage circuit breakers and protection systems. Part of the ABB Emax 2 air circuit breaker accessory range, this external toroid provides current sensing for the earthing conductor of the main power supply.
The homopolar toroid is intended for use with compatible ABB protection trip units where Source Ground Return earth-fault protection is required. It can be installed around the conductor connecting the star point of an MV/LV transformer to earth, enabling the protection system to monitor residual earth-fault current independently of the circuit breaker's internal current sensors.
With a rated current of 100 A, the 1SDA073743R1 is compatible with ABB Emax 2 E1.2 through E6.2 circuit breaker frames and is also specified for compatible Tmax XT7 and XT7M applications. It provides a dedicated sensing solution for installations requiring homopolar earth-fault measurement and is an alternative to a toroid used for differential protection.
Key Advantages
- Dedicated homopolar toroid for earth-fault protection.
- 100 A rated current for compatible protection applications.
- Designed for ABB Emax 2 E1.2–E6.2 circuit breaker systems.
- Also compatible with specified ABB Tmax XT7 and XT7M applications.
- Suitable for monitoring the earthing conductor of the main power supply.
- Provides an alternative sensing method to a differential protection toroid.
Key Features
- ABB Emax 2 accessory for electrical protection systems.
- 100 A homopolar toroid transformer.
- External current sensing for Source Ground Return protection.
- Compatible with E1.2, E2.2, E4.2 and E6.2 Emax 2 frame sizes.
- Suitable for compatible XT7 and XT7M circuit breakers.
- Designed for installation around an external earthing conductor.
- ABB order code 1SDA073743R1.
- Supplied as a loose external accessory for compatible protection systems.
Reliable Earth-Fault Current Sensing
A homopolar toroid measures current in an external conductor so that a compatible protection system can detect earth-fault conditions. In Source Ground Return applications, the toroid can be positioned on the conductor connecting the transformer star point to earth, allowing the protection trip unit to monitor current returning through the grounding path.
The ABB 1SDA073743R1 is designed to integrate with compatible ABB protection equipment and provides a dedicated 100 A sensing solution. Its compatibility across the Emax 2 E1.2–E6.2 range makes it suitable for a broad selection of low-voltage power distribution and industrial electrical protection installations.
Typical Applications
- ABB Emax 2 air circuit breaker installations.
- Source Ground Return earth-fault protection systems.
- Transformer star-point earth conductor monitoring.
- Industrial low-voltage power distribution systems.
- Main switchboards and electrical distribution panels.
- Compatible ABB Tmax XT7 and XT7M protection applications.
Technical Specifications
| Product group | Emax 2 Air Circuit Breaker |
|---|---|
| Model / order code | 1SDA073743R1 |
| Product type | Homopolar toroid transformer |
| Rated current | 100 A |
| Application | Earth-fault / Source Ground Return protection |
| Emax 2 compatibility | E1.2–E6.2 |
| Additional compatibility | Tmax XT7 / XT7M |
| Installation | External toroid on earthing conductor |
| ABB Product ID | 1SDA073743R1 |
| EAN | 8015644776763 |
Frequently Asked Questions
What is the ABB 1SDA073743R1 used for?
The ABB 1SDA073743R1 is a homopolar toroid transformer used for earth-fault current sensing, including Source Ground Return protection applications in compatible ABB circuit breaker and protection systems.
What is the rated current of the ABB 1SDA073743R1?
The 1SDA073743R1 is the 100 A version of ABB's homopolar toroid range.
Which ABB Emax 2 circuit breakers are compatible with this toroid?
The homopolar toroid is specified for the ABB Emax 2 E1.2 through E6.2 circuit breaker range.
Where is the homopolar toroid installed?
It is installed externally around the relevant earthing conductor, such as the conductor connecting the star point of an MV/LV transformer to earth in a Source Ground Return protection arrangement.
Is the ABB 1SDA073743R1 a differential protection toroid?
No. The 1SDA073743R1 is a homopolar toroid and can be used as an alternative to a toroid for differential protection in suitable ABB protection configurations.
Trusted ABB Circuit Protection Technology
ABB Emax 2 protection accessories are designed to integrate with ABB circuit breakers and electronic protection systems, helping engineers implement dependable monitoring and earth-fault protection within industrial and commercial power distribution installations.
