Operation principle and hardware description 49
Door devices
The cabinet doors are equipped with:
• an inverter control panel
• AC and DC main switch operating handles
• an emergency stop push button in frames 2 × R8i and 3 × R8i (option +Q951 in R7i
and R8i)
• an emergency stop reset button (with option +Q951) and ground fault indication/reset
button (with option +Q954) in frame R7i and R8i.
The emergency stop push button is wired to digital input DI6 of inverter control unit A43.
When the button is pushed, switch S20 in the control circuit opens, and the DI6 status
changes to zero. The inverter stops modulating and opens the AC and DC contactors.
Description
1 DC cable lead-throughs
2 DC input terminals (fuse protected)
3 Input DC fuses
4 Connecting knobs for temporary grounding of the DC busbars for work
5 DC main switch
6 Ground fault monitoring device (options +Q954, +Q976 and +Q981)
7 DC contactor
8 Inverter DC fuses
9 Inverter module
10 Inverter module cooling fan
11 LCL filter
12 LCL filter cooling fan
13 AC contactor
14 AC fuses
15 AC main switch-disconnector (Q1)
16 AC output (grid connection) terminals with connecting knobs for temporary grounding for work
17 Cabinet fans (on the cubicle doors)
18 AC output cable lead-throughs
19 Grid monitoring relay (options +Q969, +Q974, +Q975 and +Q980)
20 Heating resistor (option +G300)
21 AIMA I/O module adapter
22 Charging circuit fuses
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