For Sale: Used Siemens TUMETIC® Oil Transformer 630 kVA – Excellent Condition

• Siemens TUMETIC® hermetically sealed oil transformer
• Power: 630 kVA, 3-phase, 50 Hz
• Voltages: 20 kV / 0.4 kV (Dyn5), taps ±2×2.5%
• Year: 2015 (commissioned 2017 in solar park)
• Condition: Pristine, fully operational, ideal state – low hours, no leaks/corrosion
• Oil: Nynas Nytro Libra (PCB <0.1 ppm), ONAN cooling
• Weight: 2.11 t, noise 48 dB(A)
• Advantages: From Dutch solar farm, low maintenance, proven reliability

Rare opportunity: premium Siemens unit, ~9 years young, at fraction of new price

For Sale: Used Siemens TUMETIC® Oil Transformer 630 kVA – Excellent Condition

• Siemens TUMETIC® hermetically sealed oil transformer
• Power: 630 kVA, 3-phase, 50 Hz
• Voltages: 20 kV / 0.4 kV (Dyn5), taps ±2×2.5%
• Year: 2015 (commissioned 2017 in solar park)
• Condition: Pristine, fully operational, ideal state – low hours, no leaks/corrosion
• Oil: Nynas Nytro Libra (PCB <0.1 ppm), ONAN cooling
• Weight: 2.11 t, noise 48 dB(A)
• Advantages: From Dutch solar farm, low maintenance, proven reliability

Rare opportunity: premium Siemens unit, ~9 years young, at fraction of new price 

Basic Nameplate Data:

• Manufacturer: Siemens
• Series / Design: TUMETIC® (hermetically sealed tank, no conservator)
• Type / Code: 4HB5867-4ZA05
• Year of Manufacture: 2015
• Rated Power: 630 kVA
• Phases: 3-phase
• Frequency: 50 Hz
• Vector Group: Dyn5
• Cooling Type: ONAN (Oil Natural Air Natural)
• Insulating Oil: Nynas Nytro Libra (mineral oil, compliant with IEC 60296)
  • PCB Content: ? 0.1 ppm (WGK 1 – practically PCB-free)
• Total Weight: 2.11 tonnes (2110 kg)
• Sound Power Level: LWA max 48 dB(A)
• Max Short-Circuit Withstand Time: 2 seconds

Voltage and Current Ratings:

• High Voltage Side (HV – Primary): 20 kV (nominal 21 000 V at mid-tap)
• Low Voltage Side (LV – Secondary): 0.4 kV (400 V)
• Off-Load Tap Changer: ±2 × 2.5 % (5 positions total):
  • Position 1: 22 050 V / 630 kVA
  • Position 2: 21 525 V
  • Position 3: 21 000 V (nominal, 630 kVA)
  • Position 4: 20 475 V
  • Position 5: 19 950 V
• Rated Current HV: 17.32 A (at 630 kVA / 21 000 V)
• Short-Circuit Current: 866 A
• Impedance Voltage (uk): 3.97 %

Insulation Levels (typical for Um = 24 kV class):

• Highest Voltage for Equipment: Um = 24 kV
• Lightning Impulse Withstand (LI): 125 kV
• Power-Frequency Withstand (AC 50 Hz): ~50 kV (standard IEC/EN 60076)

Additional TUMETIC® Series Features:

• Hermetically sealed corrugated tank (compensates oil expansion without conservator or gas cushion ? maintenance-free for ~30–40 years).
• Designed for distribution networks, solar/wind farms, industrial applications.
• Typical Efficiency: ~98.5–99 % at 50–100 % load (based on similar models; exact no-load/load losses not on nameplate but often P? ? 800–1200 W, Pk(75}C) ? 5000–6750 W for non-eco versions from that era).