Kaco Powador XP500-XP550-HV TL Manuel d'utilisateur

12-NPD-01-3dm-170c Design Guide of the Medium Voltage Transformers for KACO Central Inverter This document describes the requ

10/14 5. REQUIREMENTS FOR MEDIUM-VOLTAGE TRANSFORMERS, THAT ARE CONNECTED TO 3 CENTRAL INVERTERS The transformer shown in Fig.12 is a section-win

11/14 Fig.13 Equivalent circuit with short circuited high voltage winding 2. Equivalent series impedance between both low voltage winding: The

12/14 ZH(1%)ZLa(5%)ZLb(5%)ZLc(5%) Fig. 15 Equivalent series impedance Z(%) of section-winding transformer 4. No neutral point is required on

13/14 6. REQUIREMENTS FOR MEDIUM-VOLTAGE TRANSFORMERS, THAT ARE CONNECTED TO 4 CENTRAL INVERTERS The transformer shown in Fig.12 is a section-win

14/14 Fig.18 Equivalent circuit with short circuited high voltage winding 2. Equivalent series impedance between both low voltage winding: Th

15/14 ZH(1%)ZLa(5%)ZLb(5%)ZLc(5%)ZLd(5%) Fig. 20 Equivalent series impedance Z(%) of section-winding transformer 4. No neutral point is requ

16/14 APPENDIX  Winding technology Medium voltage transformer that is connected with transformerless solar inverter must be designed with sectio

17/14 CoreLow Voltage winding1Low Voltage winding2Low Voltage winding3High Voltage windingCase3. LLLH

12-NPD-01-3dm-170c B-1701~1716, 2ND Woolim Lions Valley, 146-8, Sangdaewon-dong, Jungwon-gu, Seongnam-si, Gyeonggi-do, South Kore

19/14 REVISION HISTORY Revision number Description Name (Date) “0”  Initial version Joon.Kim (20-Oct-2014) “a”  Revision by adding the model

2/14 1. LIST OF THE CENTRAL INVERTERS OF KACO Model Rated Power Rated AC Voltage Protection Class Type XP100-HV 100kW 3*380V(±10%) IP21, Indoor

3/14 2. TECHNICAL PROPERTIES Medium voltage transformer that is connected with transformerless solar inverter must comply with following technica

4/14 3. The transformer must be designed for voltages on its low‑voltage windings that can exhibit a voltage gradient dV/dt of up t

5/14 3. REQUIREMENTS FOR MEDIUM-VOLTAGE TRANSFORMERS, THAT ARE CONNECTED TO 1 CENTRAL INVERTER The transformer shown in Fig.3 is a double-winding

6/14 2. Equivalent series impedance Z(%) of the double-winding transformer: To summarize of the contents in Article 2, the equivalent series

7/14 4. REQUIREMENTS FOR MEDIUM-VOLTAGE TRANSFORMERS, THAT ARE CONNECTED TO 2 CENTRAL INVERTERS The transformer shown in Fig.7, is a dual stacked

8/14 Fig.8 Equivalent circuit with short circuited high voltage winding 2. Equivalent series impedance between both low voltage winding: The

9/14 ZH(1%)ZLa(5%)ZLb(5%) Fig. 10 Equivalent series impedance Z(%) of dual stacked (four-winding) transformer 4. No neutral point is required o