FH22L Latching Relay
Views: 550  Author: Fanhar Relay  Time: 2025.01.09

FH22L Latching Relay


In the highly demanding and complex power control scenarios of today, the FH22L latching relay stands out with its remarkable performance and has become a crucial component in numerous applications.  

I. Outstanding Features of the FH22L Latching Relay

1.High Switching Capacity: It works well for power distribution equipment, industrial automation production lines, and other scenarios. Its impressive contact switching capacity of up to 100A allows it to effortlessly manage a variety of medium and high current load requirements, ensuring smooth and stable power transmission.

2.Diverse Coil Types: Both single coil and double coil control options are given. The single coil mode is appropriate for application scenarios where cost and space are both important for its lower price and relatively plain build. On the other hand, the twin coil mode may handle complex control jobs and offers advantages in reaction speed and control precision. For instance, it may improve power control in smart grid meters.

3. Customization: To satisfy the needs of every client, it can alter accessories such as copper shunts and transformers. These accessories can further optimize the relay's performance in a variety of application circumstances. High-precision power meters may be enhanced with custom transformers.

4. High Dielectric Withstand Voltage: The dielectric withstand voltage between the coil and contacts is 4KV. It can prevent breakdowns from voltage fluctuations and surges in the power grid. This guarantees the safe, stable operation of the entire power system.

5.Strong Anti-interference Capability: It is very reliable and has good resistance to power frequency interference.It can ensure stable, reliable operation in areas with many smart home devices. It will prevent malfunctions. It also works in industries with motors and transformers. They cause complex electromagnetic interference.

6.Environmental Protection and Design Advantages:Its strict adherence to the RoHS standard makes it eco-friendly. It is legal to use and sell. Its integrated design cuts maintenance costs. It lowers failure risks from installation errors and allows for automated setup. This improves production efficiency.

 

II. Detailed Product Parameters

1. Contact Configuration: There are two options. 1A is a single normally open contact. 1B is a single normally closed contact. They can meet different circuit connection needs and flexibly control signal on-off in designs.

2. Rated Load: It can stably carry a load of 100A at 250VAC. It's suitable for the control circuits of many common power equipment and industrial machines.

3.Insulation Resistance: The initial value is 1000MΩ (500VDC). The high insulation resistance prevents current leakage. This ensures the circuit's safety and stability, protecting operators and equipment.

4.Dielectric Withstand Voltage:Between open contacts, it is 2000VAC for 1 minute, and between contacts and coil, it is 4000VAC for 1 minute. Its high withstand voltage lets it work in harsh conditions. It prevents insulation breakdown from excessive voltage.

5.Closing/Opening Time: Both are not more than 20ms. The fast response time can meet the requirements of application scenarios with high real-time demands. For example, in emergency protection devices of the power system, it can quickly cut off the faulty circuit to prevent the expansion of accidents.

6.Environmental Adaptability:It has a broad operating temperature range of -40°C to 85°C and can function steadily in an environment with 5% to 85% relative humidity. In a humid industrial building or a chilly outdoor substation, it can function dependably.

7.Installation and Weight: It adopts a plug-in pin type + screw type (XB) connection method, which is convenient for installation and disassembly, facilitating equipment maintenance and upgrading. Its weight of approximately 50g (excluding accessories) is advantageous in portable power detection equipment with weight requirements or control cabinets with limited space.


III. Wide Range of Application Fields

The FH22L latching relay is widely used in smart meters, compound switches, smart homes, and new energy fields. Smart meters precisely control the metering and on-off of electricity. This ensures accurate recording of users' electricity consumption and fair billing. In compound switches, it realizes rapid circuit switching and protection. This improves the efficiency and reliability of power distribution. Smart home systems can stably control the power to various appliances. This gives users a convenient and comfortable experience. In the new energy field, like solar and wind power, it controls the conversion and distribution of electricity. This enables the efficient use of clean energy.

IV. Stringent International Safety Certifications

The FH22L latching relay has successfully obtained the authoritative certification from TÜV Rheinland, complying with standards such as IEC62052 - 31:2005 UC2/UC3 and IEC/EN 62055 - 31:2005 Annex C (UC3).

V. Important Precautions for Use

1.Factory State and Reset: The product is in the closed state by default when leaving the factory. However, due to factors such as vibration during transportation or impact during installation, the state may change. So, it is essential to check and reset it before use. It must be closed or opened, as needed. This will ensure the equipment works properly.

2. Avoid External Force Impact: To maintain its performance, avoid dropping the product or subjecting it to other external forces during use and storage. An external force may damage the relay's internal structure. It could reduce its performance and lifespan.

3.Voltage Drive Requirements: The rated value of the excitation voltage must be met. It is recommended that the pulse width be at least 50 ms and that the actual driving voltage be equal to and 1.5 times the rated voltage. Furthermore, it is vital to avoid enlivening the "open" and "close" coils at the same time, as well as avoid energizing them for a single second, as this may damage the relay or cause its performance to decrease.

4.Load Terminal Welding:In general, the load terminals are not suitable for tin soldering, wave soldering, or reflow soldering. To ensure the long-term reliability of the connection, spot welding is suggested for the connection, and care should be taken to prevent assembly stress from damaging the terminals.

5.Customization and Technical Support: Since this relay is a customized product, please contact Zhejiang Fanhar Electronics Co., Ltd. promptly if you have any technical problems or need further guidance relating to how the gadget works. This will ensure that the product is used and cared for right.


In conclusion, the FH22L latching relay is a reliable choice in the field of power control, providing an unparalleled guarantee for continuous operation of various power equipment and systems due to its outstanding performance, strict quality certifications, and wide usage.

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