Mitsubishi Electric FR-F500 Series Instruction Manual page 24

9) 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.
10) Use the space on the left-hand side of the main circuit terminal block to wire the cables for connection of
the power supply terminals R1, S1 for the control circuit of the FR-F520-11K.
Do not use residual current protective device as the only protection against indirect
contact.
Protective earth (ground) connection essential.
Do not connect more than 2 wires on the protective earth (ground) terminal.
Use contactor and no fuse breaker EN/IEC standard compliant.
Use transformer or surge absorber EN/IEC standard compliant.
Notes on Earthing (Grounding)
• Leakage currents flow in the inverter. To prevent an electric shock, the inverter and motor must be
earthed (grounded).
• 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
R S T U V W
N P1 P
CAUTION
Motor Capacity
2.2 kW (3HP) or less
3.7 kW (5 HP)
5.5 kW, 7.5 kW
(7.5 HP, 10 HP)
11 kW to 15 kW
18.5 kW to 37 kW
45 kW, 55 kW
(60 HP, 75 HP)
13
INSTALLATION AND WIRING
R1 S1
Charge lamp
Screw size (M5)
Earth (Ground) Cable
200V class
(15 to 20 HP)
(25 to 50 HP)
2
(Unit: mm )
Gauge
400V class
2 2
3.5 2
5.5 3.5
14 8
22 14
38 22