Operation principle and hardware description 35
Note: The exact configuration depends on the variant and the selected options.
The layout illustrations shown here are an example only.
No. Description No. Description
1. DC cable lead-throughs (blind plates as stan-
dard)
14. AC contactor
2. DC input cable terminals (fuse-protected)
Note: The configuration of the terminals
depends on the selected options.
15. AC fuses
3. Input DC fuses 16. AC disconnectors (+F296).
With option +F253, AC breakers are located
here instead of the optional AC disconnectors.
4. Connecting knobs for temporary grounding of
the DC busbars for work
17. AC output (grid connection) terminals with con-
necting knobs for temporary grounding for work
5. Power supplies and buffers (48 V DC) 18. Cabinet internal fans
6. MGND. Negative DC grounding as standard 19. AC output cable lead-throughs (blind plates as
standard)
7. MIRU. Insulation resistance measurement. 20. AC surge protection
8. DC contactor 21a. Optional 1-phase output transformer
(option +G410) (not shown)
9. DC surge protection 21b. Optional internal power transformer
(option +G415) (not shown)
10. Inverter power module 22. Charging circuit and axillary distribution.
The optional internal transformer is located in
this section behind other devices.
11. Main channel cooling fans 23. AC500 I/O unit
12. LCL filters:
12a: Converter-side inductor
12b: Capacitor module
12c: Grid-side inductor
24. Main control unit
13a. LCL filter cooling fan (external)
The location of the fan can vary.
25. Optional 3-phase terminal
(option +G429 or +G430)
13b. LCL filter cooling fan (internal) 26. 24 V DC power supply and buffers
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