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1SDA076538R1 ABB MA 160 Magnetic Trip Unit 960-2240A XT2 3P
ABB 1SDA076538R1 is a 160 A MA magnetic-only trip unit for compatible three-pole SACE Tmax XT2 circuit breakers, providing adjustable instantaneous short-circuit protection from 960 to 2240 A.
£151.94
Why Choose the ABB MA 160 IM=960...2240 XT2 3P 1SDA076538R1 Trip Unit?
The ABB 1SDA076538R1 is an MA magnetic-only trip unit designed for compatible ABB SACE Tmax XT2 three-pole moulded case circuit breakers. As part of the ABB SACE Tmax XT / T-Max XT 250 range, it provides instantaneous short-circuit protection for applications where overload protection is provided separately.
Rated at 160 A, the MA release provides an adjustable instantaneous magnetic trip threshold (Im) from 960 to 2240 A. This adjustable range allows the short-circuit protection setting to be coordinated with the characteristics of the protected circuit while accommodating normal transient currents associated with applications such as motor starting.
The 1SDA076538R1 is intended for three-pole XT2 configurations and is particularly suited to motor circuit protection arrangements. Because an MA release provides magnetic short-circuit protection rather than thermal overload protection, an appropriate separate overload protective device is required where overload protection is necessary.
Key Advantages
- Genuine ABB SACE Tmax XT2 MA trip unit.
- 160 A rated current for compatible XT2 applications.
- Adjustable instantaneous magnetic protection from 960 to 2240 A.
- Designed for three-pole XT2 circuit breaker configurations.
- Magnetic-only protection is well suited to motor circuits with separate overload protection.
- Adjustable Im setting supports coordination with motor starting and circuit characteristics.
- Purpose-designed for integration with compatible ABB SACE Tmax XT equipment.
Key Features
- ABB SACE Tmax XT2 compatibility.
- MA magnetic-only trip unit.
- 160 A rated current.
- 960–2240 A adjustable instantaneous trip range.
- Instantaneous magnetic short-circuit protection.
- Three-pole configuration.
- Suitable for motor circuit protection schemes with separate overload protection.
- No integral thermal overload protection.
- Genuine ABB circuit breaker protection accessory.
Magnetic Short-Circuit Protection for Motor Circuits
Motor circuits can experience substantial inrush current during starting, making correctly coordinated short-circuit and overload protection important. The ABB 1SDA076538R1 MA release provides adjustable instantaneous magnetic protection from 960 to 2240 A, allowing the trip threshold to be selected to provide short-circuit protection while accommodating the normal starting characteristics of the application.
Unlike a thermomagnetic trip unit, the MA release does not provide thermal overload protection. In a motor protection system it is therefore typically combined with a suitable overload relay or other dedicated overload protective device, allowing the magnetic trip unit to provide rapid short-circuit protection while the separate device protects the motor against sustained overload conditions.
Typical Applications
- Motor circuit protection systems.
- Motor control centres.
- Industrial machinery and production equipment.
- Three-phase motor feeders.
- Electrical control panels.
- Low-voltage industrial switchboards.
- Circuits using separate overload protection with instantaneous short-circuit protection.
Technical Specifications
| Series | SACE Tmax XT / T-Max XT 250 Range |
|---|---|
| Frame compatibility | XT2 |
| Product designation | MA 160 IM=960...2240 XT2 3P |
| ABB order code | 1SDA076538R1 |
| Product type | Magnetic trip unit |
| Release type | MA |
| Rated current | 160 A |
| Protection type | Instantaneous magnetic short-circuit protection |
| Instantaneous trip setting (Im) | 960–2240 A |
| Instantaneous adjustment range | 6–14 × In |
| Number of poles | 3 |
| Overload protection | Separate overload protection required where applicable |
Frequently Asked Questions
What is the ABB 1SDA076538R1 used for?
The ABB 1SDA076538R1 is an MA magnetic trip unit for compatible three-pole ABB SACE Tmax XT2 circuit breakers, providing adjustable instantaneous short-circuit protection.
What is the rated current of the ABB 1SDA076538R1?
The MA trip unit has a rated current of 160 A.
What is the instantaneous trip range of the ABB 1SDA076538R1?
The instantaneous magnetic trip setting (Im) is adjustable from 960 to 2240 A, equivalent to approximately 6 to 14 times the 160 A rated current.
Does the ABB MA 160 trip unit provide overload protection?
No. The MA release provides instantaneous magnetic short-circuit protection rather than thermal overload protection. A suitable separate overload protective device is therefore required where overload protection is necessary.
Which ABB circuit breaker frame is the 1SDA076538R1 designed for?
The 1SDA076538R1 is designed for compatible ABB SACE Tmax XT2 three-pole circuit breaker configurations.
Reliable ABB Protection for Motor Circuits
ABB SACE Tmax XT magnetic protection solutions provide adjustable instantaneous short-circuit protection for demanding industrial applications, supporting coordinated motor circuit designs where overload protection is provided by a dedicated protective device.
