Maintenance 12.96
5-6 Siemens AG 6SE7087-6BM70
SIMOVERT MASTER DRIVES Operating Instructions
5.2.7.2 Replacing the VDU and VDU resistor
VDU Voltage-Dividing Unit
VDU and VDU resistor are only available for drive converters with higher supply voltages. The VDU mounting
bracket is part of the electronic module assembly.
♦ VDU
• Remove the plug connectors
• Release the mounting bolt
• Remove the VDU
Install the new VDU in the inverse sequence.
♦ VDU resistor
• Release the cable ties
• Remove the plug connections
• Unbolt the VDU resistor
Install the new VDU resistor in the inverse sequence
5.2.7.3 Replacing the PSU
PSU Power-Supply Unit (Power Supply)
♦ Remove the VDU and VDU resistor (if available)
♦ Remove the VDU mounting panel
♦ Release the plug connections on the PSU
♦ Release the bolts ( six Torx M4) on the PSU
♦ Remove the PSU
Install the new PSU in the inverse sequence
5.2.7.4 Replacing the IGD
IGD IGBT-Gate Drive
The IGD is located behind the module busbars and consists of one board for type of construction J
three boards for type of construction K
• Remove the capacitors
• Remove SML and SMU
• Remove the module busing
♦
Type of construction J
• Remove nine fiber-optic cables at the top of the
IGD
• Release the mounting bolts and remove the
IGD.
♦
Type of construction K
• Remove the fiber-optic cables at the left of the
IGD (three per IGD)
• Remove the P15 cable
• Release the mounting bolts
• Withdraw the IGD from the retaining bolts
towards the right and remove
• Insert a new IGD, and insert towards the left in
the groove of the mounting bolts under the
incoming busbars.
Install a new IGD in the reverse sequence.
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