Zero-Phase Current Transformers ZCT Outline The ZCT Series of compact molded-type zero-phase current transformers is ideal for improving the sensitivity, compactness and light weight of electric shock prevention earth leakage breakers. Features * High sensitivity. * Compact and light weight. * Laminated iron core type. Applications * Electric shock prevention earth leakage breakers. * Short circuit relays. Shape and Dimensions MR-1,2,3,4 MR-1-P3,P5 H (5) A Spare solder D2 D1 [5.0] D3 D1 B Pin <5> D3 H Product name D2 L D1 (0.3) D2 (0.3) 7.5 9.2 12.0 17.0 7.7 7.7 19.0 21.5 27.0 31.3 19.0 19.0 MR-1 MR-2 MR-3 MR-4 MR-1-P3 MR-1-P5 Pin : 0.8 solder-plated wire Each part's dimensions (mm) D3 (0.4) H L (3.0) 22.0 24.3 30.0 33.7 21.0 21.5 8.00.3 8.00.3 10.00.3 10.50.3 8.5 max. 8.5 max. 40.0 80.0 67.0 67.0 -- -- A (0.3) B (0.3) -- -- -- -- 3.0 5.0 -- -- -- -- 10.0 10.5 Specifications Product name Rated current Output voltage Overload characteristics (-20C to 80C) (%) max. (A) (mV) min. MR-1 30 MR-2 30 MR-3 60 8 10 MR-4 125 MR-1-P3 30 MR-1-P5 30 Note:)We can accommodate other specifications as well, so please ask if required. 14 NEC TOKIN Sensors Vol.03 Temperature characteristics (rated load) (%) max. Unbalance characteristics 10 13 Measurement conditions (%) max. R=0.3 k Io=22.5 mA R : Output load, Io = Io : Detection current Before Using Zero-Phase Current Transformers ZCT * Strong shocks such as from being dropped may change the characteristics. Take care to avoid any subjecting the transformers to physical shocks. NEC TOKIN Sensors Vol.03 15