ABB ACS 600 MultiDrive, User Manual

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Chapter 3 – Hardware Description
ACA 635 IGBT Supply Sections 3-3
IGBT Supply Unit The IGBT Supply Unit includes the parts listed below:
• Converter (ACN 634 xxxx)
• Converter cooling fans
• DC fuses
• the following control boards inside the converter:
- Thick-film Hybrid Board (NRED) in 690 V units only for limiting the
maximum voltage
- Power Supply Board (NPOW)
- Main Circuit Interface Board (NINT)
- Control Distribution Board (NXPP) in frame sizes R10i to 4 x R12i
- Gate Driver Power Supply Board (NGPS) in frame sizes R12i and
up for supplying power to NGDR boards
- Gate Driver Board (NGDR)
Converter The converter consists of an IGBT bridge which forms controlled d.c.
voltage from the supply network a.c. voltage. The bridge is capable of
delivering braking energy back to the network.
Frame Size A converter (ACN 634 xxxx) consists of
R8i to R9i one converter module
R10i to R12i three phase modules (ACN 644 xxxx)
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one converter
2 x R11i, 2 x R12i two times three phase modules (ACN 644 xxxx) = two phase
module blocks
Þ
one converter
4 x R11i, 4 x R12i four times three phase modules (ACN 644 xxxx) = four phase
module blocks
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one converter
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No. 1 No. 2
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No. 1 No. 2 No. 3
No. 4