Control- and isolating transformer

STEU 400/48

Characteristics

General data

The transformers of the STEU series ensure safe galvanic isolation of the primary circuit from the secondary circuit. The unique BLOCK IMPEX vacuum impregnation process provides excellent protection against external influences while reducing noise levels. Installation is simple and quick thanks to the innovative push-in terminal technology.

Benefits

 Control and isolating transformer according to EN (IEC) 61558-2-2 and EN (IEC) 61558-2-4

 Dual input voltage 230 and 400 Vac

 Very good inrush behavior due to reduced inrush currents

 High power density through a compact design concept

 Primary side ±15 V taps for voltage adjustment

 Touch-protected connection terminals according to UVV BGV A3

Product Control- and isolating transformer
Order number STEU 400/48
Series STEU
Power 400 VA
Input 230 V / 400 V ± 15 V
Output 2 x 24 V • 8.33 Aac
Phases 1
Frequency range 50 Hz to 60 Hz
Short-Circuit Losses 24.71 W
No-Load Losses 14.47 W
Short-Term Power / instantaneous output 1,440 VA
Short circuit voltage uk 4.03 %
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 Iii0
Cooling type AN
Environment
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
Input terminal Push-in terminal
Output terminal Push-in terminal
Terminal PE Flat plug connection
Size and Weight
Width 120 mm / 4.72 in
Height 124 mm / 4.88 in
Depth 124 mm / 4.88 in
Weight 5.3 kg / 11.684 lbs
Low Voltage Directive EN 61558-2-2
EN 61558-2-4
Approval cURus - Recognized UL 5085-1/-2; CSA 22.2

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