Grundfos RSI - Parallel Diode Selection

4.7 Parallel diode selection
When RSI A-C or RSI MR5-MR10 is used in the Solar
Pump application, a diode must be connected
between DC+ and DC- to protect the inverter against
reverse voltage. See tables below for diode
specification.
Diode specification, Mains voltage 3AC 208-240 V, 50/60 Hz, up to 400 V in V DC
AC drive
Diode
specifications
Enclosure size AC drive type
Min. IFav
[A]
Min. Voltage rating
[V]
Max. Vf [V]
@ IFav [A]
A
0007 15
1200 1.5
0008 18
0011 25
0012 28
B
0018 40
0024 54
0031 70
C
0048 110
0062 140
MR5
0018 50
1200 1.5
0024 63
0031 80
MR6
0048 125
0062 160
MR7
0075 200
0088 250
0105 250
MR8
0140 400
0170 500
0205 500
MR9A
0261 625
0310 800
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