Mitsubishi Electric FR-D720S-008SC Original Instruction page 33

A.1.2 Low Voltage Directive
We have self-confirmed our inverters as products compliant to the Low Voltage Directive (conforming standard EN 61800-5-1) and
placed the CE mark on the inverters.
Outline of Instructions
If your application requires by installation standards an RCD (residual current device) as up stream protection please select according
to DIN VDE 0100-530 as following:
Single phase inverter type A or B
Three phase inverter only type B.
– Additionally, when selecting a residual current device (RCD), leakage current caused by the mains filter, the length of the shielded
motor cable and the carrier frequency must be taken into consideration.
– When connecting AC current using switches without a step function, brief asymmetrical loads may result in unwanted
triggering of the residual current device (RCD). It is recommendable here to use a Type B residual current device (RCD) Type B
with delayed actuation or to switch on all three phases simultaneously using a main contactor.
If you do not use a residual current operated protectice device, provide double or reinforced insulation between the inverter and
other equipment, or put a transformer between the main power supply and inverter.
Do not use a residual current operated protective device (RCD) as an electric shock protector without connecting the equipment
to the earth. Connect the equipment to the earth securely.
Wire the earth terminal independently. (Do not connect two or more cables to one terminal.)
Use the cable sizes on page 7 under the following conditions.
– Ambient temperature: 40 °C maximum
– If conditions are different from above, select appropriate wire according to EN 60204 ANNEX C TABLE 5.
Use a tinned (plating should not include zinc) crimping terminal to connect the earth cable. When tightening the screw, be careful
not to damage the threads.
For use as a product compliant with the Low Voltage Directive, use PVC cable whose size is indicated on page 8.
Use the moulded case circuit breaker and magnetic contactor which conform to the EN or IEC Standard.
Use the inverter under the conditions of overvoltage category II (usable regardless of the earth (ground) condition of the power
supply), overvoltage category III (usable with the earthed-neutral system power supply, 400 V class only) specified in IEC664.
To use the inverter under the conditions of pollution degree 3, install it in the enclosure of IP54 or higher.
To use the inverter (IP20) outside of an enclosure in the enviroment of pollution degree 2, fix a fan cover with the fan cover
fixing srews enclosed.
FR-D720S-070SC and 100SC, FR-D740-080SC or less
Example for FR-D740-036SC
On the input and output of the inverter, use cables of the type and size set forth in EN 60204 Appendix C.
The operating capacity of the relay outputs (terminal symbols A, B, C) should be 30 V DC, 0.3 A. (Relay outputs are basically
isolated from the inverter internal circuit.)
Control circuit terminals on page 5 are safely isolated from the main circuit.
Fan cover fixing screw
Fan cover
Fan connector
Fan
FR-D740-120SC or more
Fan cover
fixing screws
Fan cover
Fan
Fan connector
Example for FR-D740-160SC
APPENDIX
27