Geya always adheres to the enterprise tenet of "leading the industry with professional, scientific and technological quality". With strong R & D ability, complete manufacturing level and reliable product quality, Geya provides high-quality services for the automation field.
Switch and relay manufacturers are further enhancing their product reliability designs to meet more stringent industrial and military applications.Products designed for these applications often need to meet the most stringent environmental requirements, such as water, heat, solvent, dust, and other contaminants.In many cases, they also need to resist high-strength impact and vibration, and require a long mechanical life.In the past six months, several switch and relay manufacturers, including knitter switch, EAO, electroswitch, ITT cannon and NKK, have launched new products that can withstand harsh environments.
What are the electrical life requirements of power directional relay?The relay contact should be able to make and break the circuit with DC inductive load (time constant of 5ms) with voltage not greater than 250V and current not greater than 1a, with breaking power of 10W.
1. Event process
on May 20, a certain unit 2eh oil pump was running, EH oil pressure was low, and 1eh oil pump was started by interlock.11: At 28:58, the steam turbine tripped, the first output was low EH oil pressure, the boiler MFT, the generator transformer unit tripped, and the trip process curve is shown in Figure 1.