Besides of the different frequency of 50Hz and 60Hz power system, European/Asian single phase 3wire 220v-240v (L,N,G) is different with American split phase 4wire 120v/240v (L1-L2,N,G) power supply. GoHz frequency converter is a great solution to convert between 50Hz and 60Hz to make the appliance work at its rated frequency among different countries, the input accepts both single phase 3wire 220v-240v and split phase 4wire 120/240v system, also the output terminals can be selected for either European 3wire standard or American 4wire standard. But in some cases, people may not notice the difference of the wiring system when ordering a GoHz converter, or just bring GoHz converter to another country, as the output terminals are factory-selected, it needs to do some modifications on the output terminals. This article will show to how to modify a GoHz converter from European/Asian single phase 3wire L-N-G output to American split phase 4wire L1-L2-N-G output.
Warning: please find an experienced electrician to do the modification and follow this instruction strictly!!!
| 1. Open the left & right side covers of GoHz frequency converter, find out the terminal blocks of the main transformer, tear down the insulating bush and mark them as 1,2,3,4 (refer to bellow pictures). |
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2. Unscrew the terminal blocks of the transformer. |
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3. Cut off the cables connected to the capacitors, and mark them as 5,6,7,8. |
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4. Disassemble the PE earth cable of GoHz converter output side, get a 16mm2 70cm length cable (marked as I cable), and a 0.5mm2 100cm length cable (marked as II cable). Screw one end (B) of I cable with the transformer's 2,3 cables and the capacitor's 6,7 cables. Screw the other end (A) of I cable with II cable to GoHz converter's output PE terminal. |
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5. Disassemble the cables on the 9 terminal of GoHz converter's output switch, replace with a 16mm2 110cm length cable (marked as III cable), and cut off the red 0.5mm2 cable (marked as IV cable). |
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6. Screw one end (C) of III cable with IV cable to the 9 terminal of GoHz converter's output switch, pull the other end (D) of III cable through A1/B2 inductors and connect it with the capacitor's 5 cable to the transformer's 1 terminal. |
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| Screw the other end of 10 cable with the capacitor's 8 cable to the transformer's 4 terminal. (The other end of 10 cable is the 4 cable in step 1) | ||
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7. Cut off all of the cables on high/low grade switch and wrap them with insulating tape. |
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8. Connect the cables with the same mark (9-9, 10-10, 11-11, and 12-12), and reverse position of A+ and A-. |
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9. Pull out the 13 cable and then plug to 14 terminal. |
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10. Wrap the cables of the AC contactor with insulating tape, make sure all of the cables are well connected as the instruction indicated, then power on GoHz frequency converter. |
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Related articles:
GoHz Frequency Converter Commissioning
Wiring GoHz Frequency Converter to US single phase 120/240v
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