Installation
4.2 Electrical Installation
Table 4- 7 Feeder protection with fuse, UL category JDDZ
Max. rated current of the fuse
Short-circuit current rating SCCR (Short circuit current rating)
Table 4- 8 Feeder protection with circuit breaker, UL categories DIVQ and NKJH
Max. rated current
of the circuit
breaker
Short-circuit current rating
SCCR (Short circuit current
rating)
30 A 3RV2711…, 3RV1742…, LGG…,
or CED6…
DIVQ 65 kA, 480 V 3AC
25 A
NKJH 65 kA, 480 V 3AC
3RV.031-4DA10
24-V power supply with multiple inverters
Installation using 24 V bus
The following options are available for the 24 V supply of the inverter:
1. A T distributor with integrated power supply unit supplies the 24 V.
Advantage: Low installation costs.
2. An external power supply unit supplies the 24 V.
Advantage: You can switch off the 400 V without interrupting the 24 V supply and thus
the fieldbus communication of the inverter.
The inverter can conduct a maximum current of 8 A through its 24 V connector.
Figure 4-8 24 V bus from T distributor or with separate power supply
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
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