Lust CDA3000 - 1 2 3 Selection of Inverter Module 3

Engineering Guide CDA3000
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3 Selection of inverter module
3.1 Technical data .........................................................3-3
3.1.1 Acceptance tests .................................................3-5
3.1.2 Ambient conditions ..............................................3-6
3.1.3 Installation and cooling methods ..........................3-7
3.2 Extreme operating conditions ..............................3-14
3.2.1 Mains side/system condition ..............................3-16
3.2.2 Loading on the supply system ............................3-20
3.2.3 General points on the mains connection .............3-21
3.2.4 Operation of fault current breakers .....................3-23
3.2.5 Switching at the inverter input ...........................3-24
3.2.6 High-voltage test/Insulation test .........................3-24
3.2.7 Forming of the DC-link capacitors ......................3-25
3.2.8 Direction of rotation and terminal designation ....3-27
3.2.9 Switching at the inverter output .........................3-28
3.2.10 Short-circuit and ground fault proofing ...............3-29
3.2.11 Motor cable length .............................................3-29
3.2.12 Voltage load on the motor winding .....................3-31
3.2.13 Motor protection possibilities .............................3-31
3.2.14 Power reduction .................................................3-33
3.2.15 Calculation of effective inverter
capacity utilization ............................................ 3-55
3.2.16 Measurement on the inverter module .................3-58