TRU & SVR
TRU & SVR
Transformer Rectifier Units (TRUs) and Static Voltage Regulators (SVRs) are essential power conditioning devices widely used in industrial, aerospace, telecom, and commercial applications.
TRUs convert AC supply voltage into regulated DC output using a transformer for voltage conversion and rectifier circuits for AC-to-DC conversion. They are designed for high efficiency, low ripple, and reliable DC power supply, commonly applied in aerospace power systems, railway traction, communication equipment, and process industries.
SVRs maintain a stable AC output voltage despite fluctuations in input supply or load conditions. Using static solid-state devices such as IGBTs, thyristors, or SCRs, SVRs provide fast, precise regulation without moving parts, ensuring protection of sensitive loads such as medical equipment, IT systems, and industrial automation controls.
Together, TRUs and SVRs enhance power quality, system reliability, and equipment protection in critical environments.
Technical Specification
| Category | TRU (Transformer Rectifier Unit) | SVR (Static Voltage Regulator) |
|---|---|---|
| Function | Converts AC input to regulated DC output | Regulates AC input to maintain constant output voltage |
| Standards & Compliance | IEC 60076, IEC 60146, MIL-STD (aerospace), UL/CE | IEC 62040, IEC 61000 (EMC), IEEE 446, UL/CE |
| Input Voltage | 115 V / 230 V / 400 V / 415 V AC, 50/60 Hz | 230 V / 400 V / 415 V AC, 50/60 Hz |
| Output Voltage | 12 V / 24 V / 28 V / 48 V DC (custom on request) | Regulated AC output (±1% to ±2% of nominal value) |
| Output Power | 500 W – 500 kW (customizable) | 1 kVA – 2000 kVA (scalable) |
| Ripple / Regulation | ≤ 2% ripple (filtered) | ±1% voltage regulation under load and input variation |
| Efficiency | ≥ 90% | ≥ 95% |
| Cooling | Natural air (AN) or Forced air (AF) | Natural or Forced air cooling depending on rating |
| Insulation Class | Class F (155°C) or Class H (180°C) | Class F (155°C) or Class H (180°C) |
| Enclosure Protection | IP20 / IP23 / IP54 (industrial) MIL-qualified (aerospace) | IP20 / IP31 / IP54 (indoor industrial) |
| Environmental Limits | –25 °C to +55 °C, ≤ 95% RH, altitude ≤ 1000 m | –25 °C to +50 °C, ≤ 95% RH, altitude ≤ 1000 m |
| Applications | – Aerospace DC power supply – Railway traction – Communication & radar – Industrial process control | – Data centers – Medical equipment – Industrial automation – IT & telecom loads |