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1SDA076250R1 ABB Homopolar Toroid 800 A E1.2-E6.2 XT7 XT7M
ABB 1SDA076250R1 is an 800 A homopolar toroidal current sensor for monitoring the main power supply earthing conductor in compatible Emax 2 E1.2–E6.2 and Tmax XT7/XT7M earth-fault protection systems.
£1,847.80
Why Choose the ABB 1SDA076250R1 800 A Homopolar Toroid?
The ABB 1SDA076250R1 is an 800 A homopolar toroidal current sensor designed for earth-fault monitoring in compatible ABB low-voltage protection systems. Part of the ABB Emax 2 accessory range, this external toroid is designed for use with E1.2 through E6.2 air circuit breakers and compatible Tmax XT7 and XT7M systems.
The homopolar toroid is installed around the earthing conductor of the main power supply and provides a current measurement for compatible electronic protection equipment. This enables the protection system to monitor earth-fault current through the transformer star-centre or grounding conductor input and respond according to the configured protection functions.
With an 800 A rating, the 1SDA076250R1 is the highest-rated version in ABB's 100 A, 250 A, 400 A and 800 A homopolar toroid range for these applications. It is supplied as a loose accessory and provides a dedicated sensing solution for demanding industrial and infrastructure power distribution systems.
Key Advantages
- Dedicated 800 A homopolar toroidal current sensor.
- Designed for earth-fault monitoring of the main power supply earthing conductor.
- Compatible with ABB Emax 2 E1.2 through E6.2 circuit breakers.
- Suitable for compatible Tmax XT7 and XT7M protection systems.
- Provides an external current input for compatible ABB electronic protection equipment.
- Genuine ABB accessory engineered for dependable protection-system integration.
Key Features
- ABB homopolar toroid for earth-fault current sensing.
- 800 A sensor rating.
- Designed for the earthing conductor of the main power supply.
- Transformer star-centre sensor input application.
- Compatible with Emax 2 E1.2, E2.2, E4.2 and E6.2.
- Compatible with Tmax XT7 and XT7M.
- Supplied as a loose external accessory.
- ABB order code 1SDA076250R1.
Reliable Earth-Fault Current Monitoring
A homopolar toroid enables a compatible protection unit to monitor current in the earthing conductor of the main power supply. By supplying this current measurement to the protection electronics, the sensor supports detection and management of earth-fault conditions in low-voltage electrical distribution systems.
The ABB 1SDA076250R1 is engineered as an external sensor for compatible ABB protection architectures and is an alternative to the differential-protection toroid where the application requires monitoring of the main supply earthing conductor. Its compatibility across multiple Emax 2 frame sizes and Tmax XT7 platforms provides flexibility for a wide range of switchgear applications.
Typical Applications
- Earth-fault monitoring in low-voltage power distribution systems.
- ABB Emax 2 E1.2–E6.2 circuit breaker installations.
- ABB Tmax XT7 and XT7M circuit breaker systems.
- Transformer star-centre earth-current monitoring.
- Industrial power distribution switchboards.
- Commercial, utility and infrastructure electrical systems.
Technical Specifications
| Series | Emax 2 / Tmax XT |
|---|---|
| Order code | 1SDA076250R1 |
| Product type | Homopolar toroidal current sensor |
| Sensor rating | 800 A |
| Measurement function | Earth-fault current sensing |
| Monitored conductor | Main power supply earthing conductor |
| Sensor input application | Transformer star centre |
| Compatible Emax 2 frames | E1.2, E2.2, E4.2, E6.2 |
| Compatible Tmax XT frames | XT7, XT7M |
| Supply format | Loose part |
| EAN | 8015644809300 |
| Commodity code | 85389099 |
| Country of origin | Italy |
| Weight | approx. 1.3 kg |
| Product group | Emax 2 Air Circuit Breaker |
Frequently Asked Questions
What is the ABB 1SDA076250R1 used for?
It is an 800 A homopolar toroidal current sensor used to monitor the main power supply earthing conductor for earth-fault protection in compatible ABB systems.
What is the rating of the ABB 1SDA076250R1?
The homopolar toroid has a sensor rating of 800 A.
Which ABB Emax 2 circuit breakers are compatible with this toroid?
The 1SDA076250R1 is designed for compatible Emax 2 E1.2, E2.2, E4.2 and E6.2 systems.
Is the 1SDA076250R1 compatible with Tmax XT circuit breakers?
Yes. The homopolar toroid is suitable for compatible ABB Tmax XT7 and XT7M systems as well as Emax 2 equipment.
Where is the ABB 1SDA076250R1 installed?
The toroid is used on the earthing conductor of the main power supply, providing the current measurement required by compatible protection equipment for earth-fault monitoring.
Trusted ABB Protection Technology
ABB Emax 2 and Tmax XT protection accessories are engineered for dependable low-voltage power distribution, with homopolar toroids such as the 1SDA076250R1 providing dedicated earth-fault current sensing for compatible protection systems.
