Transformer integrated with harmonic filter

 

Oil immersed hermetic 12-pulse transformer integrated with harmonic filter

 

 

Fig. 1. Typical 12-pulse drive system

 

Fig. 2. 12-pulse drive system with new design transformer integrated with harmonic filter 

 

Comparison of parameters

Parameter Typical solution New design Advantages
THDi input current 6-8% <5% Better 35%
No-load capacitive current 20-40% <5% Better 85%
Drop voltage 10-16% <5% Better 60%
Load losses* 11200 W 9500 W Saving 15%
Weight* 5400 kg 4200 kg Saving over 20%
Cost* 70 000 $ 62 000 $ Saving 14%
*- The calculation was made for 600kVA reference power

 

 

Technical data 



 
Type ETHF
Standards EN 60076-1; EN 60076-6; IEEE 519
Input phase no 3
Output phase no 6
Type load Inverter with 12-pulse input
Rated power 200 to 1000 kVA
Rated primary voltage 3300 to 33000V
Rated primary current Adjusted to rated power

 
Primary taps ±2x2,5%
Rated secondary voltage 2x480V or 400V
Rated secondary current Adjusted to rated power
Frequency 50Hz or 60Hz
Vector group connection Yd1y0
No-load losses Adjusted to rated power
Nominal load losses Adjusted to rated power
Efficiency 97%-99%
THDi input current <5%
No-load capacitive current <5%
Drop voltage <5%
Isolating levels Adjusted to rated voltages
Short circuit voltage P/S1 5%
Short circuit voltage P/S2 5%
Short circuit voltage S1/S2 8-10%
Max ambient temperature 55ᵒC
Cooling ONAN
Winding material Copper
Tank material Stainless steel 316L
Dimension Adjusted to rated power
Total weight Adjusted to rated power

 

 

 

Technical specification of the Oil immersed

hermetic 12-pulse transformer integrated with

harmonic filter



 
Type ETHF
Standards EN 60076-1; EN 60076-6; IEEE 519
Input phase no 3
Output phase no 6
Type load Inverter with 12-pulse input
Rated power 600 kVA
Rated primary voltage 3300 V
Rated primary current 105 A

 
Primary taps ±2x2,5%
Rated secondary voltage 2x400V
Rated secondary current 2x433 A
Frequency 50Hz
Vector group connection Yd1y0
No-load losses 1500 W
Nominal load losses 8000 W
Efficiency 98,4%
THDi input current <5%
No-load capacitive current <5%
Drop voltage <5%
Isolating levels LI40AC10/AC3/AC3
Short circuit voltage P/S1 5%
Short circuit voltage P/S2 5%
Short circuit voltage S1/S2 8-10%
Max ambient temperature 55ᵒC
Cooling ONAN
Winding material Copper
Tank material Stainless steel 316L
Dimension 1800x1650x1900
   

 

This work was realized as a result of project implementation POIR-03.02.01-24-0007-18

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