Switchgear & control

Elettromeccanica di Marnate, Italy

1000 kVA EMM Transformer – Elettromeccanica di Marnate, Italy
Basic Data
• Manufacturer: EMM – Elettromeccanica di Marnate, Italy
• Year of Manufacture: 2005
• Serial Number: 33068
• Type: Cast Resin Transformer
• Rated Power: 1000 kVA
• Number of Phases: 3
• Frequency: 50 Hz
• Cooling: AN (natural air)
Voltages and Currents
HV Side (High Voltage)
Rated Voltage:
• 15,000 V
Tapping Positions:
Position Voltage
+5% 15,750 V
+2.5% 15,375 V
Rated 15,000 V
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−2.5% 14,625 V
−5% 14,250 V
HV Side Current:
• 38.5 A
LV Side (Low Voltage)
• Secondary Voltage: 400 V
• Secondary Current: 1443.4 A
Three-Phase Power Relationship: 𝑆 = √3 𝑈 𝐼
for:
• 𝑆 = 1000 kVA
• 𝑈 = 400 V
• 𝐼 ≈ 1443 A
Electrical Parameters
• Connection Group: Dyn5
• Short-Circuit Voltage (Vcc): 5.8%
• Insulation Class: F
• Insulation System Temperature: 155°C
• Permissible Temperature Rise: 100 K
Insulation Levels
• HV Side:
o LI: 75 kV
o AC: 38 kV
• LV Side:
o AC: 3 kV
Protection Rating and Weight
• Protection Rating: IP00
• Weight: 2300 kg
Environmental Classes
• E2 – Environmental Resistance (humidity/contamination)
• C2 – Climatic Resistance
• F1 – Fire Resistance
Standards
The transformer was manufactured in accordance with:
• CEI 14-8:1999
• IEC 726:1992
• HD 464 S1:1988/A4:1995

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