ABB A2A250TW Circuit Breaker
- 250A
- 3 Pole
- Panel Mount
Quantity
ABB A2A250TW 3 Pole Circuit Breaker
New
Quantity
Description
ABB A2A250TW 3 Pole Circuit Breaker
The ABB A2A250TW is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 250 Amps and a voltage rating of 240VAC, 250VDC. It has an interrupting rating of 10kAIC at 240V. The A2A250TW has a chassis, rear mounting type.
Specifications
| Brand | ABB |
|---|---|
| Series | A2A |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | A2 |
|---|---|
| For Use With | ['Panelboards with 125-250A Capacity'] |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Approval | UL |
|---|
Product FAQs
7 answersWhat type of trip unit is installed in the ABB A2A250TW circuit breaker?
The A2A250TW features a fixed thermal-magnetic trip unit (TMF). The thermal protection is fixed at 250A for overload conditions, and the magnetic protection is fixed at 2500A (10 times the rated current) for short-circuit protection.
Can the ABB A2A250TW be mounted in different orientations?
Yes, ABB FORMULA A2 frame circuit breakers can be mounted horizontally, vertically, or lying down without any derating of their nominal performance characteristics.
What frame size does the A2A250TW belong to?
This circuit breaker belongs to the ABB FORMULA A2 frame size, which accommodates current ratings from 125A up to 250A in a highly compact footprint.
Does the A2A250TW require derating for high-altitude installations?
The breaker maintains its nominal performance without derating up to an altitude of 6,562 feet. Installations above this altitude may require adjustments for voltage and current capacity due to changes in air density and dielectric strength.
What type of terminal connections does the A2A250TW use?
This fixed version circuit breaker comes standard with front terminals for straightforward cable or busbar connections inside panel boards.
What safety standards does the ABB A2A250TW meet?
The A2A250TW is UL 489 listed for use in North American power distribution applications and also complies with IEC 60947-2 standards.
Are internal accessories available for the A2A250TW breaker?
Yes, the FORMULA A2 frame supports various field-installable accessories, including shunt opening releases, undervoltage releases, and auxiliary contacts.
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