Control- and isolating transformer
STU 250/2x115
Characteristics
General data
The control transformers of the STU series are designed for universal voltage adjustment and 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. The robust metal base plate with elongated holes ensures easy and secure mounting.
Benefits
› Control and isolating transformer according to EN (IEC) 61558-2-2 and EN (IEC) 61558-2-4
› Very good inrush behavior due to reduced inrush currents
› High power density through a compact design concept
› Touch-protected connection terminals according to UVV BGV A3
Product | Control- and isolating transformer |
Order number | STU 250/2x115 |
Series | STU |
Power | 250 VA |
Input | 230 V / 400 V / 460 V / 520 V ± 20 V |
Output | 2 x 115 V • 1.09 Aac |
Phases | 1 |
Frequency range | 50 Hz to 60 Hz |
Short-Circuit Losses | 20 W |
No-Load Losses | 8.9 W |
Short-Term Power / instantaneous output | 555 VA |
Short circuit voltage uk | 7.2 % |
EN Insulation class | B (130°C) |
UL Insulation class | class 105 |
Duty Cycle | 100 % |
Wire material | Copper |
Efficiency | 89.6 % |
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 | 2 |
Electrical Connections
Input terminal | Screw terminal |
Output terminal | Screw terminal |
Terminal PE | Flat plug connection |
Size and Weight
Width | 120 mm / 4.72 in |
Height | 123 mm / 4.84 in |
Depth | 92 mm / 3.62 in |
Weight | 4.1 kg / 9.039 lbs |
Low Voltage Directive |
EN 61558-2-2 EN 61558-2-4 |
Approval cURus - Recognized | UL 5085-1/-2; CSA 22.2 |
VDE Approval |
VDE 0570-2-x (DIN EN 61558-2-x) |