ABB FAZ-XHIN11 auxiliary contact equipment

ABB FAZ-XHIN11 auxiliary contact equipment

Core positioning and design philosophy of the product

ABB FAZ-XHIN11 is a modular auxiliary contact device designed specifically for the FAZ series miniature circuit breakers (MCBs). Its main function is to convert the "closed" and "open" states of the circuit breaker into electrical signal outputs through mechanical linkage with the MCBs, achieving remote monitoring, signal feedback, and interlocking control of the main circuit's on-off status. Compared with independent auxiliary contacts, this device adopts a snap on integrated design that matches the FAZ series circuit breaker, which does not require additional installation space and can be directly combined with the circuit breaker, greatly improving the convenience and space utilization of system integration.

The product complies with the international standard IEC 60947-5-1 and the national standard GB 14048.5, using highly reliable mechanical structures and conductive materials to ensure precise and stable contact actions. It can adapt to the frequent action requirements of electrical control systems for a long time, providing reliable signal protection for circuit status monitoring and automation control.

Core functional features and technological advantages

1. Accurate state signal conversion and transmission

The FAZ-XHIN11 auxiliary contact device is linked to the operating mechanism of the FAZ series circuit breaker through a mechanical linkage. When the circuit breaker is closed or opened, the auxiliary contacts synchronously achieve the action of connecting or disconnecting, converting the mechanical state into an electrical signal. The device is equipped with one set of normally open auxiliary contacts, which can accurately feedback the operating status of the circuit breaker - when the circuit breaker is closed, the auxiliary contacts close and output the circuit signal; When the circuit breaker is opened (including fault tripping), the auxiliary contact opens and outputs a circuit breaker signal. This synchronous action characteristic ensures the real-time and accuracy of the status signal, providing a reliable data source for remote monitoring systems.

2. Compact integrated design with strong adaptability

The product adopts a modular buckle design with a width of only 17.5mm, which perfectly matches the width specifications of the FAZ series miniature circuit breakers. It can be directly fastened to the side of the circuit breaker without the need for additional DIN rail installation space, perfectly adapting to the layout requirements of compact distribution boxes. At the same time, the device supports combination use with FAZ series circuit breakers of different current levels (6A-3A), without the need to replace auxiliary contacts for different models of circuit breakers, greatly improving the adaptability and versatility of the product.

3. High reliability and long lifespan performance

The auxiliary contacts are made of silver alloy material, which has excellent conductivity and resistance to arc erosion, effectively reducing contact resistance and avoiding signal transmission failures caused by contact oxidation. The internal mechanical linkage mechanism of the equipment adopts high-strength engineering plastics and precision spring components, with a mechanical life of over 10000 times and an electrical life of over 5000 times, which can meet the control scenario requirements of long-term frequent actions and significantly reduce the maintenance and replacement costs in the later stage.

4. Excellent electrical performance and safety guarantee

The product has high rated insulation voltage and impulse voltage resistance performance, and can operate stably in complex electrical environments, effectively resisting the impact of power grid fluctuations and electromagnetic interference on signal transmission. The contact shell is made of insulation material with a flame retardant rating of UL94 V0, which has excellent flame resistance and insulation performance, effectively preventing the risk of fire caused by contact arcs and ensuring the safe operation of the electrical system.

5. Convenient installation and wiring operation

The device adopts a snap on installation method. When installing, simply align it with the side installation slot of the FAZ series circuit breaker and gently press to fix it. No professional tools are required, and the installation efficiency is extremely high. The wiring adopts spring type crimping terminals, supporting copper wires of 1.5mm ² -2.5mm ². When wiring, simply insert the wire into the terminal hole to achieve a firm connection, avoiding the problem of loose wiring caused by vibration, and facilitating later line maintenance and repair.

Key technical parameters

Basic Parameters

Contact type

1 set of normally open (NO)

Rated insulation voltage (Ui)

400V AC

Rated working voltage (Ue)

230V/400V AC

Rated working current (Ie)

6A (AC-15 load category)

performance parameters

Rated connection and disconnection capacity

6A/400V AC（AC-15）

mechanical life

≥ 10000 times

Electrical life

≥ 5000 times (under rated load)

Environment and installation parameters

Working environment temperature

-25℃~70℃

relative humidity

5%~95% (no condensation)

Protection level

IP20 (when installed in the distribution box)

Installation method

Snap on type (integrated with FAZ series circuit breakers)

Adaptation parameters

Compatible with circuit breaker series

ABB FAZ series miniature circuit breaker

Dimensions (width x height x depth)

17.5mm × 89mm × 62mm (height and depth consistent with FAZ circuit breaker combination)

Applicable industries and typical application scenarios

1. Electrical monitoring of commercial buildings and residential buildings

In the power distribution systems of shopping malls, office buildings, and residential communities, the FAZ-XHIN11 auxiliary contact equipment can be used in conjunction with the FAZ series circuit breakers to achieve centralized monitoring of the on/off status of each circuit. For example, in the lighting distribution system of an office building, auxiliary contacts transmit the status signals of each floor's lighting circuit breaker to the building's automatic control system. Operation and maintenance personnel can view the power status of each circuit in real time through the monitoring platform. When a circuit breaker trips due to a fault, the system can immediately issue an alarm signal to quickly locate the fault area and carry out maintenance, improving operation and maintenance efficiency.

2. Interlocking protection system in industrial control

In scenarios such as motor control and assembly line equipment control in industrial production workshops, auxiliary contact devices can achieve interlocking protection of the equipment. For example, in the motor control circuit, the FAZ-XHIN11 auxiliary contact is linked to the FAZ circuit breaker of the motor power supply circuit. When the circuit breaker trips due to overload or short circuit, the auxiliary contact is disconnected, and the fault signal is transmitted to the motor control PLC. The PLC immediately sends instructions to cut off the control circuit, prevent the motor from starting again, and trigger the alarm device to ensure the safety of the equipment and operators.

3. Power monitoring for data centers and communication rooms

The core equipment such as servers and switches in data centers and communication rooms have extremely high requirements for power stability. The FAZ-XHIN11 auxiliary contact device can be combined with the FAZ circuit breaker of the UPS power output circuit to achieve real-time monitoring of the power circuit status. When the circuit breaker experiences a tripping action, the status signal output by the auxiliary contact can be quickly transmitted to the computer room monitoring system. The system immediately starts the backup power switching program and notifies the operation and maintenance personnel to handle the fault, ensuring the continuous power supply of the core equipment and avoiding data loss caused by power interruption.

4. Power supply guarantee for medical and precision instruments

In the power supply circuit of medical equipment in hospitals and the power supply system of precision instruments in laboratories, auxiliary contact devices can achieve real-time feedback of power supply status. For example, in the power supply circuit of medical equipment in the operating room, the FAZ-XHIN11 auxiliary contact transmits the status signal of the circuit breaker to the medical equipment monitoring terminal. When the power supply circuit fails and the circuit breaker trips, the terminal immediately emits an audible and visual alarm to remind medical staff to switch to the backup power supply in a timely manner, ensuring the smooth progress of the surgery.

Core points of installation and operation and maintenance

1. Installation specifications and requirements

-The equipment should be used in conjunction with ABB FAZ series miniature circuit breakers, and it is strictly prohibited to combine it with other brands or series of circuit breakers to avoid abnormal operation caused by mechanical size mismatch. Before installation, it is necessary to confirm the model and current rating of the circuit breaker to ensure compatibility with the auxiliary contact equipment.

-When installing, first fix the FAZ circuit breaker on the DIN rail, then align the buckle of the auxiliary contact device with the installation slot on the side of the circuit breaker, and gently press it horizontally until you hear a "click" sound to confirm that the device is firmly fixed. Avoid excessive force during installation to prevent damage to the mechanical linkage mechanism.

-When wiring, it is necessary to connect according to the terminal identification of the auxiliary contacts (incoming and outgoing ends). Copper wires with a cross-sectional area of 1.5mm ² -2.5mm ² should be selected, and the stripping length should be 8mm-10mm to ensure that the wires are fully inserted into the terminal holes. After wiring is completed, gently pull the wires to confirm a secure connection.

-After installation, the opening and closing mechanism of the circuit breaker needs to be manually operated to check whether the action status of the auxiliary contacts is synchronized with the circuit breaker - the contacts are closed when closing and open when opening, and a multimeter is used to measure the on/off status of the contacts to ensure normal signal transmission.

2. Daily operation and troubleshooting

-During daily inspections, it is important to focus on checking whether the connection between the auxiliary contact equipment and the circuit breaker is secure, and whether there is any looseness or displacement; At the same time, check for overheating, discoloration, and aging of the wiring terminals. If the terminal temperature exceeds 60 ℃, it is necessary to promptly investigate whether the wiring is loose or overloaded.

-Regularly (recommended every quarter) manually operate the circuit breaker to open and close 3-5 times, monitor the on/off status of auxiliary contacts through a multimeter, ensure that the contacts move flexibly, have good contact, and have no poor or stuck contacts. If abnormal contact continuity is found, it is necessary to promptly check whether the mechanical linkage mechanism is worn or blocked.

-When there is a signal transmission fault in the auxiliary contact, the following steps should be taken to troubleshoot: first, check if the wiring terminals are loose, and then tighten the wiring again; Next, check if the mechanical linkage mechanism is stuck. If there are foreign objects blocking it, clean it thoroughly; Finally, measure the contact resistance. If the resistance value exceeds 100m Ω, it indicates that the contact is oxidized or worn, and the auxiliary contact equipment needs to be replaced.

-After long-term operation (over 8 years) of the equipment, even if no obvious faults occur, it is recommended to replace it because the contact material and mechanical components may age, leading to a decrease in the reliability of the action and affecting the accuracy of signal transmission.