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Product Information | How to Expand the Capacity Range of the PWM Converters (Stack Type)
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How to Expand the Capacity Range of the PWM Converters (Stack Type)
How to Expand the Capacity Range of the PWM Converters (Stack Type)
A “transformer-less parallel system” and “transformer insulation type parallel system” can be used to expand the total converter capacity.
| System | Transformer isolation-less parallel system | Transformer insulation type parallel system | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| This system involves connecting converter inputs to the power supply without isolating with a transformer, etc. | This system involves isolating respective converter inputs with a transformer. | |||||||||||||
| Reduced capacity operation | Available | Available | ||||||||||||
| Number of converter to be connected | 2 to 4 converters | 2 to 6 converters | ||||||||||||
| Arrangement diagram | When 2 converters are connected |
When 2 converters are connected |
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Note2
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OPC-VG7-SIR is required for each stack.
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Note3
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OPC-VG7-SI is required for each stack.
Transformerless parallel system configuration table
2 or 3 converters of the same capacity can be connected in parallel to increase capacity or facilitate system redundancy. Typical combinations are shown in Table 2, however, other configurations are also possible.
Table 2 Transformerless parallel system combination example (400V series, MD specification)
| Connection system | Standard stack | Stack by phase | |||||
|---|---|---|---|---|---|---|---|
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 |
 |
 |
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| Capacity [kW] | Applicable converter | Applicable converter | No. of units | Applicable converter | Applicable converter | No. of units | |
| 132 | RHC132S-4E | ||||||
| 160 | RHC160S-4E | ||||||
| 200 | RHC200S-4E | ||||||
| 220 | RHC220S-4E | ||||||
| 280 | RHC280S-4E | ||||||
| 315 | RHC315S-4E | ||||||
| 355 | RHC200S-4E | 2 | |||||
| 400 | RHC200S-4E | 2 | |||||
| 500 | RHC280S-4E | 2 | |||||
| 630 | RHC315S-4E | 2 | RHC630B-4E | ||||
| 710 | RHC280S-4E | 3 | RHC710B-4E | ||||
| 800 | RHC280S-4E | 3 | RHC800B-4E | ||||
| 1000 | RHC630B-4E | 2 | |||||
| 1200 | RHC630B-4E | 2 | |||||
| 1500 | RHC800B-4E | 2 | |||||
| 1800 | RHC630B-4E | 3 | |||||
| 2000 | RHC710B-4E | 3 | |||||
| 2400 | RHC800B-4E | 3 | |||||
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Note2
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OPC-VG7-SIR is required for each stack.
AC Drives (Low Voltage) Support
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