5.4 Typical wiring diagram
Run
Overload
Insulation
Overtemp
Mute
Test
AID10
Note:
1) The connection line diameter of the input and output of the isolation transformer should match
the rated current of the isolation transformer, or it can be selected according to the following
table:
Isolation transformer type
Selected line
diameter
AITR3150
3×4mm
2
AITR5000/AITR6300
3×6mm
2
AITR8000/AITR10000
3×10mm
2
2) Terminals 11 and 12 of AIM-M10 insulation monitor need to be connected with AC220V of IT system,
which can be directly connected to 0 and 230V output terminals at the secondary side of isolation
transformer according to the diagram, and connected with 6A fuse protection in series.
3) The relay output control of the No.7 and 8 terminals of the AIM-M10 insulation monitor is a dry
node, which needs an additional fan power supply when used for the fan control. When multiple
transformers are centrally installed in one isolation power cabinet, multiple fans should be
connected in a parallel mode controlled by multiple insulation monitors, that is, every one
insulation monitor can start or stop all fans.
4) AKH-0.66P26 only needs to pass through one of the L1, L2 two wires of the isolation transformer
secondary side output terminal, but can not pass through the two wires simultaneously. The output
is connected with the 2×1.5mm
2
wire to the No.15, 16 terminals of AIM-M10, which is not allowed
for grounding.
5) In order to reliably monitor the grounding insulation of the isolation power system, the No.11,