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.

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.

Precise Control and Signal Conversion Capability

Intermediate relays play a key role in control circuits by amplifying signals, increasing the number of contacts, and realizing signal conversion, enabling precise control of other electrical equipment. Phase sequence relays can accurately detect the phase sequence of three-phase power supplies and promptly issue signals or cut off circuits when phase sequence errors or phase loss occur, effectively protecting equipment safety. These functions make relays critical components for ensuring the accuracy and stability of electrical systems.

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Overload contactors incorporate bimetal overload relays with the contactor itself safeguarding motors from getting damaged by overvolting them. The thermal mechanisms switch off the contacts through a bimetal which detaches under bountiful current. For the eletronic type the breaker uses a current sensing microprocessor and phase unbalance detection. These are constructed bespoke for 3-phase motors and follow IEC 60947-4-1. Equipped with manual/automatic reset they are commonly used in pumps compressors and conveyors in industrial applications.

Frequently Asked Questions

What types of relays does the company offer and where are they applied?

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.
Yes, the company has professional R&D capabilities and a customer-centric approach, capable of developing relays tailored to specific industry needs. Whether for special environmental requirements (e.g., high temperature, high humidity) or customized functional designs, the R&D team can provide targeted solutions, ensuring products meet both standard specifications and unique application scenarios to enhance competitiveness.
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Customer Reviews

John Smith
Exceptional Quality and Reliable Certifications

I’ve been using the company’s relays for my industrial automation projects, and the ISO-9001 and IECO certifications give me full confidence in their quality. The strict quality control is evident in every relay—they’ve never failed in high-load applications. The solid-state relays, in particular, stand out with their fast switching and zero mechanical wear, reducing our maintenance costs significantly. Highly recommended for anyone prioritizing reliability.

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.

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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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