5.2.1
Required protective devices and cable cross-sections
5.2.1.1 AC plug of H2.5 / H3 / H3A / H4A / H5A_220 / H5A_221
Power rating Upstream AC circuit breaker
H2.5
H3 / H3A
H4A / H5A
3.125 kVA
3.75 kVA
5 kVA
16A
20A
25A
Table 5-1: Recommended upstream protection
AC connector 96.031.4154.3 01K, Wieland Electric GmbH
Current rating ≤ 25 A
Min. / Max. cable diameter 10 ... 14 mm
Min. / Max. wire diameter 1.25 ... 4 mm
2
Recommended torque for terminal screws 0.8~1 N.m
WARNING !
Before commencing AC wiring, please ensure all AC circuit breakers are switched off.
5.2 AC Grid Connection : L + N + PE
The AC plug provided with the inverter has the following technical characteristics:
Read and follow the instructions delivered with the AC plug.
The AC plug delivered with the inverter can be used with flexible or rigid copper cable.
When calculating the cross section of the cable, consider:
● material used
● thermal conditions
● cable length
● type of installation
● AC voltage drop
● power losses in cable
Always follow the system installation requirements defined for your country!
Residual Current Monitoring Device
The inverter integrates Residual Current Monitoring Unit (RCMU) for the detection
of residual current will disconnect immediately from the mains power once a fault
current with a value exceeding the limit is detected.
However, if an external residual current device (RCD) (type A is recommended)
is mandatory, the switch with rating 30 mA (recommended) should be used.
RCD of other specifications can also be used according to local standard.
18
Wiring
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