Mitsubishi Electric FR-A520-0.4K Instruction Manual page 25

9) Do not install a power capacitor, surge suppressor or radio noise filter (FR-BIF option) in the output side of
the inverter.
This will cause the inverter to trip or the capacitor and surge suppressor to be damaged. If any of the
above devices are installed, immediately remove them. (If the FR-BIF radio noise filter is connected,
switching power off during motor operation may result in E.UVT. In this case, connect the radio noise filter
in the primary side of the electromagnetic contactor.)
10) When rewiring after operation, make sure that the POWER lamp has gone off, and when more than 10
minutes have elapsed after power-off, check with a meter that the voltage is zero. After that, start
rewiring work. For some time after power-off, there is a dangerous voltage in the capacitor.
11) Use the space on the left-hand side of the main circuit terminal block to run the cable for connection of
the control circuit power terminals R1, S1 of the FR-A520-11K.
Notes on Earthing (Grounding)
• Leakage currents flow in the inverter. To prevent an electric shock, the inverter and motor must be
earthed (grounded). Earthing (grounding) must be conform to the requirements of national and local
safety regulations and electrical code. (JIS, NEC section 250, IEC 536 class 1 and other applicable
standards)
• Use the dedicated earth (ground) terminal to earth (ground) the inverter. (Do not use the screw in the
case, chassis, etc.)
• Use the thickest possible earth (ground) cable.Use
the cable whose size is equal to or greater than
that indicated below, and minimize the cable
length. The earthing (grounding) point should be
as near as possible to the inverter.
• Earth (Ground) the motor on the inverter side
using one wire of the 4-core cable.
Connection cable
S T U V W
R
N P1 P
2.2kW or less
3.7kW
5.5kW, 7.5kW
11kW to 15kW
18.5kW to 37kW
45kW, 55kW
16
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INSTALLATION AND WIRING
R1 S1
Charge lamp
Screw size (M5)
Motor Capacity
200V class
3.5
5.5
14
22
38
(Unit: mm 2 )
Earth (Ground)
Cable Gauge
400V class
2 2
2
3.5
8
14
22