Relays & Limit Switches: Quality Assurance and Technological Innovation

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Yueqing Huilong Industrial Control Electrical Appliances Co., Ltd.
Yueqing Huilong Industrial Control Electrical Appliances Co., Ltd.
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Types and Applications of Relays

Types and Applications of Relays

The company’s diverse relay portfolio caters to multiple industries. Solid-state relays, utilizing semiconductor technology for contactless control, offer fast switching speeds, long lifespan, and strong anti-interference capabilities, ideal for high-frequency operations. Intermediate relays amplify signals and expand contact numbers in control circuits, enabling precise control of other electrical devices. Liquid level relays monitor and control liquid levels in tanks by switching circuits based on 液位 (liquid levels), while phase sequence relays protect three-phase systems by detecting phase errors or losses and triggering safety responses. These relays are essential for signal processing, equipment protection, and system regulation.
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Advantages

High-Quality Manufacturing and Strict Quality Control

The company ensures high-quality relay production through strict quality control, regarding quality as the lifeline of the enterprise. It continuously improves the quality management system and introduces international advanced production and testing equipment, ensuring each relay meets rigorous standards. The relays have passed ISO-9001 quality system certification and International Electrotechnical Commission IECO certification, demonstrating reliable quality and international recognition.

Diverse Types and Wide Application Scenarios

The company provides a diverse portfolio of relays, encompassing time relays, solid-state relays, intermediate relays, RXM relays, RM control relays, liquid level relays, and phase sequence relays. This variety enables their application in various electrical control systems, including industrial automation, power control, and liquid level control systems. Whether for signal amplification, circuit protection, or state detection, appropriate relay types are available to fulfill different customer requirements.

Advanced Technology and Long Service Life

Solid-state relays adopt semiconductor devices for contactless control, featuring fast switching speed, long service life, and strong anti-interference ability. Compared with traditional mechanical relays, they have no mechanical wear, reduce maintenance costs, and are suitable for high-frequency operation scenarios. Other relays like intermediate relays also use advanced design concepts to ensure stable performance and prolonged service life, providing reliable long-term use for users.

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Automation systems Relay Controls are low-power electromechanical devices that change or amplify control signals. They have a coil voltage range of 5-24V DC/AC and up to 10A of rated contact current which enables them to act as a bridge between sensors like proximity switch sensors to actuators. Other Relay Controls include Latching relays whose main feature is a memory function, reed relays whose main feature is that they are sealed hermetically, and last but not least solid state control relays which have no moving parts. They also comply with ISO 13849-1 which allows the use of these devices in safety circuits up to Performance Level d.

Frequently Asked Questions

What quality certifications do the company's relays have?

The company's relays have passed ISO-9001 quality system certification and International Electrotechnical Commission IECO certification. These certifications demonstrate that the relays meet rigorous international quality standards, backed by strict quality control processes, continuous improvement of the quality management system, and the use of advanced international production and testing equipment.
The company produces various relays, including time relays, solid-state relays, intermediate relays, RXM relays, RM control relays, liquid level relays, and phase sequence relays. These are applied in diverse electrical control systems such as industrial automation, power control, and liquid level control systems, catering to needs like signal amplification, circuit protection, and state detection across different industries.
Solid-state relays use semiconductor devices for contactless control, offering fast switching speed, long service life, and strong anti-interference capability. Unlike traditional mechanical relays, they have no mechanical wear, reducing maintenance costs and being suitable for high-frequency operation scenarios. Other relays like intermediate relays also feature advanced designs for stable performance and prolonged usability.
Intermediate relays amplify signals, increase contact numbers, and convert signals in control circuits, enabling precise control of other electrical equipment. Phase sequence relays accurately detect the phase sequence of three-phase power supplies and trigger signals or cut off circuits immediately when phase sequence errors or phase loss occur, effectively protecting equipment safety and ensuring the accuracy and stability of electrical systems.
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Customer Reviews

Emily Davis
Diverse Product Range for Versatile Applications

As a system integrator, I appreciate the wide variety of relays the company offers. From intermediate relays for signal amplification to phase sequence relays for three-phase protection, they have solutions for every control need. We recently used their liquid level relays in a water treatment plant, and they performed flawlessly, accurately detecting 液位 (liquid levels) and ensuring seamless system operation. Their ability to cover such diverse applications makes them our go-to supplier.

Sarah Miller
Customized Solutions for Unique Requirements

We had a special project requiring relays resistant to high humidity and corrosive gases. The company’s R&D team worked closely with us to develop a tailored solution, and the result exceeded our expectations. The customized relays have performed reliably in our harsh environment, proving their commitment to the customer-centric approach. Their ability to turn specific needs into functional products is why we trust them for critical applications.

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Professional R&D and Customization Services

Professional R&D and Customization Services

With continuous innovation and professional R&D capabilities, the company can develop relays tailored to specific industry needs. Whether for special environmental requirements (e.g., high temperature, high humidity) or customized functional designs, the team can provide targeted solutions. This customer-centric approach ensures that the relays not only meet standard specifications but also adapt to unique application scenarios, enhancing customer satisfaction and product competitiveness.
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Yueqing Huilong provides advanced industrial control appliances and relays for global markets. Our ISO-9001 certified products ensure quality and reliability. Contact us today!

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Company Address

No. 3789 Liujiang Road, Liushi Town,Yueqing City, Wenzhou City, Zhejiang Province, 325604

+86-18155034103

[email protected]

Time: 9.00 am-4.00 pm

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