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1SDA076249R1 ABB 400A Homopolar Toroid E1.2-E6.2 XT7 XT7M
ABB 1SDA076249R1 is a 400 A homopolar toroid current transformer designed for earth-fault current sensing with compatible ABB SACE Emax 2 E1.2–E6.2 and Tmax XT7 / XT7 M protection systems.
£1,816.88
Why Choose the ABB 1SDA076249R1 400A Homopolar Toroid?
The ABB 1SDA076249R1 is a 400 A homopolar toroid current transformer designed for earth-fault protection applications within compatible ABB low-voltage circuit breaker and protection systems. This genuine ABB accessory is designed for use with ABB SACE Emax 2 E1.2–E6.2 and Tmax XT7 / XT7 M platforms, providing current sensing on the earthing conductor of the main power supply.
The homopolar toroid provides the external current measurement required for compatible ground-fault protection functions. Installed around the relevant earthing conductor, it detects residual current associated with earth faults and provides the corresponding measurement signal to compatible ABB electronic protection equipment.
With a rated current of 400 A, the 1SDA076249R1 provides a manufacturer-designed sensing solution for applications requiring external earth-fault monitoring. It forms part of a family of ABB homopolar toroids available in multiple current ratings and can be integrated with compatible ABB protection systems including XT7, XT7 M and Emax 2 applications.
Key Advantages
- Genuine ABB homopolar toroid current transformer.
- 400 A rated current for compatible earth-fault protection applications.
- Designed for sensing current in the earthing conductor of the main power supply.
- Compatible with ABB SACE Emax 2 E1.2–E6.2 and Tmax XT7 / XT7 M applications.
- Supports external ground-fault protection when used with compatible ABB electronic protection equipment.
- Purpose-designed ABB accessory for dependable integration into low-voltage protection systems.
Key Features
- ABB homopolar toroid.
- 400 A current rating.
- Designed for earth-fault current sensing.
- Suitable for the earthing conductor of the main power supply.
- Compatible with E1.2 through E6.2 applications.
- Compatible with Tmax XT7 and XT7 M circuit breaker platforms.
- Can be used with compatible ABB external ground-fault protection functions.
- Alternative current ratings within the ABB range include 100 A, 250 A and 800 A.
Reliable Earth-Fault Current Sensing
Homopolar toroids are used in electrical protection systems to detect current associated with earth faults. By monitoring the relevant earthing conductor, the toroid provides a measurement signal that compatible protection electronics can use to identify abnormal ground-current conditions and initiate the configured protection response.
The ABB 1SDA076249R1 is specifically rated at 400 A and designed for integration with compatible ABB protection platforms. This makes it a purpose-built solution for installations using Emax 2 E1.2–E6.2 or Tmax XT7 / XT7 M equipment where external earth-fault sensing is required.
Typical Applications
- Earth-fault protection in low-voltage electrical distribution systems.
- ABB SACE Emax 2 E1.2–E6.2 protection systems.
- ABB SACE Tmax XT7 and XT7 M circuit breaker installations.
- Main power supply earthing conductor monitoring.
- Industrial switchboards and power distribution assemblies.
- External ground-fault protection and current sensing systems.
Technical Specifications
| Series | SACE Emax 2 / Tmax XT |
|---|---|
| ABB product group | T-Max XT 250 Range |
| ABB order code | 1SDA076249R1 |
| US / CA part number | ZEAHT400 |
| Product type | Homopolar toroid current transformer |
| Rated current | 400 A |
| Application | Earth-fault / ground-fault current sensing |
| Installation | Earthing conductor of the main power supply |
| Compatible breaker families | E1.2–E6.2, XT7 and XT7 M |
| Connection | Ge+ / Ge− connection to compatible ABB protection equipment |
| EAN | 8015644808297 |
| Dimensions (maximum overall) | approx. 165 × 125 × 35 mm |
Frequently Asked Questions
What is the ABB 1SDA076249R1 used for?
The ABB 1SDA076249R1 is a 400 A homopolar toroid used for earth-fault current sensing in compatible ABB low-voltage protection systems.
What is the current rating of the ABB 1SDA076249R1?
The homopolar toroid has a rated current of 400 A.
Which ABB circuit breakers are compatible with the 1SDA076249R1?
The toroid is designed for compatible ABB SACE Emax 2 E1.2–E6.2 and Tmax XT7 / XT7 M applications.
Where is the ABB 1SDA076249R1 installed?
The homopolar toroid is intended for installation around the earthing conductor of the main power supply as part of a compatible external ground-fault protection system.
What is the US / CA part number for the ABB 1SDA076249R1?
The corresponding ABB US / CA part number for the 400 A homopolar toroid is ZEAHT400.
Trusted ABB Protection for Power Distribution
ABB homopolar toroids provide purpose-designed current sensing for compatible ABB circuit breaker and electronic protection systems, supporting dependable earth-fault detection in industrial and commercial low-voltage distribution applications.
