ST 250/23/24 Block

Control- and safety isolating- resp. isolating transformer ST 250/23/24 Advantages Very good switch-on behaviour thanks to reduced starting currents High performance for the volume thanks to compact design Primary side 5 % tappings for voltage adjustment Very good corrosion protection and low noise thanks to BLOCKIMPEX vacuum impregnation Contact protected screw connection terminals complying with UVV BGV A3 Simple mounting thanks to robust metal footplate with oval slots Applications As a control transformer for the electrical isolation of the input and output sides.The construction of the transformer to supply control systems according to VDE 0113 is designed. As an isolating transformer for the safe electrical isolation of the input and output sides. The transformer may be used to set up protective separation as a protective measure in accordance with VDE 0100. As a safety isolating transformer for the safe electrical isolation of the input and output sides. The transformer is suitable for creating SELV and PELV circuits because of the limit on the output voltage. Standards 2 Z Approvals W vZ Control transformer ENEC 10 (VDE), UL 5085-1/-2, CSA 22.2 No.66 to: VDE 0570 Teil 2-2, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-2, UL 5085-1/-2, CSA 22.2 No.66 Isolating transformer to: VDE 0570 Part 2-4, DIN EN 61558-2-4, EN 61558-2-4, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Control- and safety isolating- resp. isolating transformer ST 250/23/24 Type ST 250/23/24 Type ST 250/23/24 Input Terminal and mounting Rated input voltage 230 Vac Terminals Screw-type terminals, PE 6.3 x 0.8 5 % Base plate Tappings Input Fixing method Rated frequency 50 - 60 Hz Fixing screws M5 Output Measures and weights 24 Vac 3.50 kg Rated output voltage Weight Rated power VDE (DB cos phi=1) 250 VA 555 VA Rated power VDE (KB cos phi=0.5) 61.0 1.08 No-load voltage (app. x factor) Efficiency 90 % Standards Classification Control- and safety isolating transformer Approvals cURus, ENEC 10 (VDE) Approvals Environment 105.0 Ambient temperature max. 40 C by self-cooling Cooling method Safety and protection open type Type VDE=B, UL=class 105 Class of Insulation System Protection index IP 00 84.0 86.5 I Safety class (prepared) Short circuit strength non-short-circuit proof 96.0 103.0 PRI Fusing recommendation by circuit breaker with tripping characteristic type 20 x Irated related to set) 1.00 - 1.60 A Setting range Setting value 1.20 A Order numbers ST 250/23/24 Order Number - + 30 Subjects to change.