ABB AX115-30-11-84 115A 3P Contactor 110V AC Coil

The ABB AX115-30-11-84 is a robust 3-pole contactor designed for demanding industrial applications, boasting a 115A continuous current rating and a 110V AC coil. Its core advantage lies in its reliability and compact design, making it an ideal choice for motor control, power distribution, and automation systems where consistent performance is paramount. Key technical parameters include a rated operational voltage of 690 V, making it suitable for a wide range of power circuits, and an impressive mechanical endurance of up to 20 million operations. This contactor's robust construction ensures longevity and operational stability in harsh environments.

ABB AX115-30-11-84: Product Specifications

| Parameter                     | Value                     |

| :---------------------------- | :------------------------ |

| Product Name                  | Contactor                 |

| ABB Type                      | AX115-30-11-84            |

| Poles                         | 3                         |

| Rated Operational Current (Ie) | 115 A                     |

| Coil Voltage                  | 110 V AC                  |

| Rated Operational Voltage (Ue) | 690 V                     |

| Auxiliary Contacts            | 1 NO + 1 NC               |

| Mounting                      | DIN Rail, Screw Terminals |

| Mechanical Endurance          | 20 million operations     |

| Electrical Endurance          | 1.5 million operations    |

| Protection Class              | IP20                      |

| Dimensions (H x W x D)        | 161.5 x 104 x 96 mm       |

| Ambient Operating Temp.       | -25 to +55 °C             |

Core Features & Market Positioning

The ABB AX115-30-11-84 stands out in the industrial contactor market due to its superior build quality and advanced coil technology, ensuring dependable switching operations even under heavy loads. Its direct-on-line (DOL) starting capability for motors up to 45 kW at 400V highlights its power handling capacity. ABB's established reputation for quality and innovation further solidifies the AX115-30-11-84's position as a trusted component in critical automation and power control systems. The inclusion of 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts provides essential flexibility for control circuit integration and signaling.

Key Application Scenarios

This contactor is exceptionally well-suited for a variety of demanding industrial settings. It is frequently employed in motor control circuits for pumps, fans, compressors, and conveyors in manufacturing plants and process industries. Its robust design also makes it ideal for power distribution and load shedding applications within electrical switchboards and control panels. The ABB AX115-30-11-84 is a go-to solution for applications requiring reliable switching of high currents, ensuring operational continuity and system protection.

Practical System Integration Guidance

Integrating the ABB AX115-30-11-84 into existing systems is straightforward, facilitated by its standard DIN rail mounting and screw terminal connections. For motor control, the main power terminals (L1, L2, L3 and T1, T2, T3) are connected directly to the motor and the power supply. The coil is energized by applying 110V AC to terminals A1 and A2. The auxiliary contacts can be wired into control circuits for interlocks, status indication, or feedback loops, with the NO contact closing when the main contacts are energized and the NC contact opening. Careful consideration of wire gauge and terminal torque is essential for safe and reliable connections.

Operation and Risk Mitigation

Proper operation of the ABB AX115-30-11-84 involves ensuring the coil voltage precisely matches the specified 110V AC to prevent premature wear or failure. Overloading beyond its 115A rating must be avoided to maintain the contactor's integrity and prevent potential equipment damage or electrical hazards. Risk mitigation includes regular inspection of terminals for signs of overheating or corrosion and ensuring adequate ventilation around the contactor to dissipate heat. In case of malfunction, such as failure to energize or de-energize, immediate system shutdown and expert diagnosis are recommended.

Scalability & Long-Term Value

The ABB AX115-30-11-84 offers significant long-term value through its inherent durability and compatibility with ABB's broader range of automation and control products. While not directly "scalable" in terms of increasing its individual rating, its modular design and the availability of associated ABB components allow for the expansion of control systems. It integrates seamlessly into existing ABB control architectures, providing a reliable foundation for evolving industrial automation needs and supporting eventual migration to digital solutions when paired with appropriate smart devices.

Frequently Asked Questions (FAQs)

1. What is the maximum motor power this contactor can control?

This ABB AX115-30-11-84 contactor is rated for 115A, making it suitable for direct-on-line starting of motors up to 45 kW at 400V AC.

Ensure the motor's full load current does not exceed the contactor's rating for optimal performance and longevity. Consider starter overload protection coordinated with the contactor.

2. Can the auxiliary contacts be used for both signaling and control?

Yes, the included 1 NO and 1 NC auxiliary contacts are versatile for various control logic and signaling purposes within automation systems.

They can reliably indicate the contactor's state or be used in interlock circuits to prevent conflicting operations. Always verify the contact rating for the specific application load.

3. What are the environmental conditions for operating this contactor?

The ABB AX115-30-11-84 is designed to operate reliably in ambient temperatures ranging from -25°C to +55°C, with an IP20 protection rating.

Avoid environments with excessive dust, humidity, or corrosive elements that could compromise its internal components. Ensure proper ventilation to prevent overheating.

4. How is the coil voltage of 110V AC supplied?

The 110V AC coil requires a stable power source matching this specific voltage for proper energization and reliable operation of the contactor.

This is typically supplied from a control transformer or a dedicated low-voltage AC auxiliary power supply circuit. Always verify the source voltage before connection.

5. What type of wiring is required for the main power terminals?

Screw terminals are used for connecting the main power circuits, offering a secure and reliable electrical connection for the 115A current rating.

Use appropriate cable lugs and ensure that the wires are properly stripped and securely fastened to the terminals to prevent loose connections and potential arcing. Tighten terminals to the specified torque.

6. What is the expected lifespan of this contactor?

This contactor boasts impressive durability with a mechanical endurance of up to 20 million operations and an electrical endurance of 1.5 million operations.

Regular inspections and proper operating conditions will help achieve its maximum rated lifespan in demanding industrial environments. Maintenance is key to longevity.

7. Is this contactor suitable for DC applications?

No, the ABB AX115-30-11-84 is specifically designed for AC applications with its AC coil and ratings.

Using it in a DC circuit would lead to improper operation, coil burnout, and potential safety hazards. Ensure it's only used with the specified AC voltage and frequency.

8. What safety precautions should be taken during installation?

Always ensure the main power supply is de-energized before performing any installation or wiring. Use appropriate personal protective equipment (PPE).

Follow local electrical codes and best practices for industrial control panel wiring. Double-check all connections for tightness and correct polarity.

9. How does the auxiliary contact configuration benefit system design?

The inclusion of both a normally open (NO) and a normally closed (NC) auxiliary contact offers immediate flexibility for interlocking and feedback signals in control logic.

This reduces the need for additional components, saving space and cost in control panel designs by providing essential status monitoring and safety interlocks. It simplifies complex control sequences.

10. Can this contactor be integrated with modern IIoT systems?

While the contactor itself is a direct switching device, it can be integrated into IIoT systems by pairing it with smart relays, gateways, or condition monitoring devices.

These additional components can provide remote monitoring, diagnostics, and data logging capabilities for the contactor's operational status and performance. This enables predictive maintenance strategies.