Solid-State Switching Devices for Switching Motors Solid-State Contactors 3RF24 solid-state reversing contactors, three-phase Fused version with semiconductor protection (similar to type of coordination "2") 1) The semiconductor protection for the 3RF24 controls can be used with different protective devices. Siemens recommends the use of special SITOR semiconductor fuses. The table below lists the maximum permissible fuses for each 3RF24 control. If a fuse is used with a higher rated current than specified, semi- conductor protection is no longer guaranteed.
However, smaller fuses with a lower rated current up to a lower rated current of the load can only be used after the behavior of the existing load al- ternation has been tested. Suitable fuse holders, fuse bases and controls can be found in Catalog LV 1, Chapter 19. 1) Type of coordination "2" according to EN 60947-4-1: In the event of a short-circuit, the controls in the load feeder must not endanger persons or the installation. They must be suitable for further operation. For fused configurations, the protective device must be replaced. 2) For use only with operational voltage U e up to 400 V.
■ Characteristic curves Load diagram of motor I a I e I b t a t b NSB0_01815a t p t s Operating data of motor t OP I a I e I b t a t b t p Direct starting current Rated operational current Operational current Starting time Operating time Interval time ON period Operating cycle t s t OP OP [%] = Ч 100 % t s t OP 63 Siemens · 2009 Order No. All-range fuses gR Semiconductor fuses aR Cable and line protection fuses LV HRC design Cylindrical design LV HRC design Cylindrical design LV HRC design SITOR 3NE1 Cylindr.
design NEOZED 3SE12) SITOR 3NE8 10 mm x 38 mm SITOR 3NC1 14 mm x 51 mm SITOR 3NC1 22 mm x 58 mm SITOR 3NC2 gG 3NA3 10 mm x 38 mm gG 3NW6 14 mm x 51 mm gG 3NW6 DIAZED quick 5SB1 Operational voltage U up to 506 V e 3RF24 03-.BD.. 3RF24 05-.BD.. 3RF24 10-.BD.. 3NE1 813-0 5SE1 335 3NE8 015-1 3NC1 020 3NC1 415 3NC2 220 3NA3 801-6 3NW6 001-1 3NW6 101-1 5SB1 71 3NE1 802-0 5SE1 335 3NE8 020-1 3NC1 032 3NC1 450 3NC2 263 3NA3 805-6 -- -- 5SB3 11 3NE1 802-0 5SE1 335 3NE8 020-1 3NC1 032 3NC1 450 3NC2 263 3NA3 805-6 -- -- 5SB3 11