44 Electrical design and installation
Manual Energy Storage Inverter ESI-S
As an illustration of the cable sizing process consider the following example:
ESI-S 60 A/50Hz, 3-wire connection, cable material: Cu (copper)
Step 1: IN = 60A
à
cable section = 16 [mm2]
Step 2: multiplication factor for a 16 [mm2] copper cable at 50 Hz = 1.00
Step 3: I = IN x 1.00 = 60A x 1.00 = 60 A
Step 4: I = 60A
à
cable section: 16 [mm2]
This section is equal to the section found in the previous step.
Conclusion: one copper cable of 16 [mm2] per phase is sufficient.
Remark: The cable sizing process discussed in point 2 above only takes into account the
skin effect. Any further derating due to local standards and/or installation conditions
(e.g. distance between cables, number of cables connected in parallel …) have to be
taken into account by the company responsible for the ESI cable connection.
As an example of the cable sizing procedure, consider Table 20 and Table 21, which show
the allowed current for different parameters noting typical cable manufacturer data.
WARNING: Consult your cable manufacturer for the applicable cable.