Control- and isolating transformer
TT1 25-4-23
Characteristics
General data
The control transformers of the TT1 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. The transformers stand out with a wide range of mounting options and integrated crane eyelets for transport and installation.
Benefits
› Control and isolating transformer according to EN (IEC) 61558-2-2 and EN (IEC) 61558-2-4
› Patented mounting technology
› Primary side ±5% taps for voltage adjustment
› Fixed, touch-protected screw terminals according to UVV BGV A3
› Space-saving due to upright design
| Product | Control- and isolating transformer |
| Order number | TT1 25-4-23 |
| Series | TT1 |
| Power | 25,000 VA |
| Input | 380 V / 400 V / 420 V |
| Output | 2 x 115 V • 109 Aac |
| Phases | 1 |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 247 W |
| No-Load Losses | 197 W |
| Short-Term Power / instantaneous output | 133,000 VA |
| Short circuit voltage uk | 0.9 % |
| EN Insulation class | F (155°C) |
| UL Insulation class | class 155 |
| Duty Cycle | 100 % |
| Wire material | Copper |
| Efficiency | 98.3 % |
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 | Screw terminal |
Size and Weight
| Width | 320 mm / 12.6 in |
| Height | 490 mm / 19.29 in |
| Depth | 310 mm / 12.2 in |
| Weight | 153 kg / 337.307 lbs |
| Low Voltage Directive |
EN 61558-2-2 EN 61558-2-4 |
| Approval cURus - Recognized | UL 1561; CSA 22.2 |
