Control- and safety isolating transformer

STE 400/23/24

Characteristics

Benefits

 Very good switch-on behaviour thanks to reduced starting currents

 High power density due to a compact construction design

 Primary side ±5 % tappings for voltage adjustment

 Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation

 Quick to cable up thanks to the use of spring-clamp terminals

 Contact protected screw connection terminals complying with UVV BGV A3

 Simple mounting thanks to robust metal footplate with oval slots

 Up to 250 VA with combination footplate for bolted and rail mounting

Product Control- and safety isolating transformer
Order number STE 400/23/24
Power 400 VA
Input 219 V / 230 V / 241 V
Output 24 V • 16.6 Aac
Frequency range 50 Hz to 60 Hz
Short-Circuit Losses 25.84 W
No-Load Losses 13.4 W
Short-Term Power / instantaneous output 1,440 VA
Short circuit voltage uk 4.72 %
EN insulation class B (130°C)
UL Insulation class class 130
Duty Cycle 100 %
Wire material Copper
Efficiency 91.1 %
General
Short circuit proof not short-circuit proof
Switching group Ii0
Cooling type AN
Enviroment
Ambient temperature -20 °C to 40 °C / -4 °F to 104 °F
Max. installation height 2,000 m / 6,562 ft
Protection and safety
Protection type IP 00
Protection class (prepared) I
Overvoltage category III
Degree of contamination 1
Electrical Connections
Terminal Pri Push-in terminal
Terminal Sec Push-in terminal
Terminal PE Flat plug connection
Size and Weight
Width 120 mm / 4.72 in
Height 121 mm / 4.76 in
Depth 104 mm / 4.09 in
Weight 5 kg / 11.02 lbs
Low Voltage Directive EN 61558-2-2
EN 61558-2-6
Approval cURus - Recognized UL 5085-1/-2; CSA 22.2

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