... GDT combination 2,module design 3,plug in&out type 4, MOV: In=20KA, Imax=40KA surge protector1, CE certified ... -2000 & IEC61643 standards2, MOV( In=20KA, Imax=40KA)3, main used in power supply system, storey or indoor distribution cabinet…. Applied ... for single-phase, three-phase surge protection under various power supply system ...