Understanding LF Seismic vs. Standard Versions: Key Differences Explained
This presentation highlights the major differences between LF seismic and standard versions, focusing on two main aspects: the addition of the "masselotte" on standard coils for vibration stability and the type of anti-pumping relay used. The masselotte counterweight ensures that the coil remains stable during vibrations. Additionally, the seismic version utilizes an electromechanical relay (KN) while the standard version uses an electronic anti-pumping relay (KNE). Both versions have been validated through seismic tests, ensuring their suitability for Nuclear Power Plant applications.
Understanding LF Seismic vs. Standard Versions: Key Differences Explained
E N D
Presentation Transcript
Presentation : The major difference between LF seismic version and standard version concerns the opening and closing releases. There is an additional part called "masselotte" mounted on the standard coils. The function of this part is to bring a counterweight at the coil. If there are vibrations, metal rod of the coil does not move and keep its initial step. A seismic tests have allowed validating our LF2-LF3 in MCset cubicle (test report n°990878)
Second difference is Anti-pumping Relay • On standard version of LF range there is an electronic anti-pumping relay KNE (see diagram). • On seismic version there is a OLD VERSION of anti-pumping relay - electromechanical relay KN (see diagram). • KN is confirmed for NPP application for EMC, also it allows to use closing coil circuit continuity supervision.
