Mitsumi electronic 55K, FR-F520-0.75K Motor Capacity Ground Cable Gauge 200V class 400V class

(Unit: mm2)

INSTALLATION AND WIRING

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.

		Connection cable				R1	S1
						Charge lamp
R	S	T	U	V	W	Screw size (M5)
	N		P1	P

CAUTION

Do not use residual current protective device as the only protection against indirect contact.

Protective earth connection essential.

Do not connect more than 2 wires on the protective earth terminal.

Use contactor and no fuse breaker EN/IEC standard compliant. Use transformer or surge absorber EN/IEC standard compliant.

Notes on Grounding

•Leakage currents flow in the inverter. To prevent an electric shock, the inverter and motor must be grounded.

•Use the dedicated ground terminal to ground the inverter. (Do not use the screw in the case, chassis, etc.)

• The ground cable should be as thick as possible.

Its gauge should be equal to or larger than those indicated in the following table. The grounding point should be as near as possible to the inverter to minimize the ground cable length.

•Ground the motor on the inverter side using one wire of the 4-core cable.

Motor Capacity	Ground Cable Gauge
	200V class	400V class
3.7 kW (5 HP) or less	3.5	2
5.5 kW, 7.5 kW	5.5	3.5
(7.5 HP, 10 HP)
11 kW to 15 kW	14	8
(15 to 20 HP)
18.5 kW to 37 kW	22	14
(25 to 50 HP)
45 kW, 55 kW	38	22
(60 HP, 75 HP)

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