Lenze 8400 Manuel d'utilisateur télécharger pdf (Page 193)

Electrical installation

Devices i n the power range 0.37 ... 22 kW (3/PE AC 400 V)

Terminal assignment of the power connections



193

EDS84ASC552 EN 9.1

IT system

 Danger!

ƒ The contact screws have to be removed when controllers are used in IT

operation or when external filters of E84AZESRxxxxLL or E84AZESRxxxxSD

type are used.

ƒ When both contact screws for interference suppression are removed, the

enclosure for inverters E84AV ... will be reduced from IP 20 to IP 10.

ƒ Pleas also observe further notes in the hardware manual and in mounting

instructions of the inverters and filters.

 Stop!

Overvoltage at components:

In case of an earth fault in IT systems, intolerable overvoltages may occur in

the plant.

Possible consequences:

Destruction of the device.

Protective measures:

Before using the controller in the IT system, remove the contact screws on the

supplysideandthemotorside.( Fig. 6-20).

 Tip!

You can increase the degree of protection to IP 20 again by screwing plastic

bolts m ade of polyamide into the open threaded holes. The thickness of the

bolt head including the washer must be greater than 3.2mm, as for example in

case of cheese head screws with internal hexagon (similar to DIN EN ISO 4762)

According to the relevant EMC product standard EN 61800-3 there are no limit values for

noise emission in the high-frequency range. Therefore, the technical data for EMC do not

apply.

Before using the controller in the IT system, remove both contact screws for interference

suppression:

– Two hexagon socket screws M4 x 16 mm with washers.

– Insert for Allen key: 3mm

The tightening torque of the contact screws for connecting the drive to other networks is

1Nm(8Ib-in).

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Lenze 8400 Manuel d'utilisateur Page 193