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WEIQI ELECTRIC

2025.07.03

High-Voltage Direct Current: A Major Breakthrough in Power Transmission

In modern power systems, high-voltage direct current (HVDC) transmission technology is playing an increasingly vital role. It is a method that uses stable DC electricity to transmit large amounts of power over long distances, offering numerous significant advantages.

2025.07.03

Electromagnetic Relays: Key Components in the Field of Electrical Control

In modern electrical control systems, electromagnetic relays play an indispensable role. As an automated control component, they offer numerous advantages, including compact size, lightweight design, long lifespan, and reliable operation. Widely used in industrial automation, automotive electronics, smart home systems, communication devices, and many other fields, these relays provide robust support for the smooth functioning and intelligent control of various equipment.

2025.07.03

Relay Applications in Photovoltaic Power Generation

In recent years, the solar power industry has seen significant shifts in demand, particularly with an increasingly urgent need to address risks posed by natural disasters. When facing challenges like earthquakes and floods—severe natural hazards—solar power systems must demonstrate exceptional stability and reliability to ensure a continuous, uninterrupted supply of electricity.

2025.07.03

How the relay output contacts in industrial remote controls work

A relay is an electronic control device that features a control system (also known as the input circuit) and a controlled system (or output circuit), commonly used in automatic control circuits. Essentially, a relay acts as an automatic switch, enabling the control of larger currents with smaller ones. An electromagnetic relay typically consists of components such as an iron core, coil, armature, and contact reeds. When a specific voltage is applied across the coil terminals, a current flows through the coil, generating an electromagnetic effect. This magnetic force overcomes the tension of the return spring, pulling the armature toward the iron core and causing its moving contact to engage with the normally open (NO) stationary contact. Once the power to the coil is cut off, the electromagnetic attraction vanishes, allowing the armature to snap back under the spring’s restoring force, re-establishing contact with the original stationary NO contact. This cycle of attraction and release enables the relay to either complete or break the electrical circuit as needed.

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