Why Are GuoWei ZhiChuang’s Protective Relays So Popular Among Global Users?
GuoWei ZhiChuang’s protective relays have gained widespread popularity among global users due to their advantages in technological innovation, reliability, market adaptability, and policy support. Here is a detailed analysis:
2025/07/03
Which Countries Globally Lack the Capability to Develop protection relays?
Based on search results, the global research and development (R&D) capabilities in the relay industry are unevenly distributed. Many countries still rely on imports or lack independent R&D capabilities for high-end relays (such as high-voltage, high-reliability, aerospace/military-grade relays). Below is an overview of countries or regions with limited or no capability to develop protective relays:
2025/06/25
History of Global protection Relay
protection relays originated from simple fuses in the late 19th century. In 1901, the induction-type overcurrent relay was introduced, followed by ASEA (now ABB) launching the first time-delay overcurrent relay, TCB, in 1905, enabling graded protection. The current differential protection principle was proposed in 1908, and directional protection emerged in the 1910s.
2025/06/23
How much does it cost to build a 33KV-11KV substation?
The cost of constructing a 33kV/11kV substation varies depending on the region, scale, equipment configuration, and local market conditions. Below is a detailed cost breakdown in USD for international markets:
2025/06/20
