Lenze 8400 Manuel d'utilisateur télécharger pdf (Page 256)

Braking operation

Braking o peration with external brake resistor

Wiring of brake resistor



256

EDS84ASC552 EN 9.1

8.2.6 Wiring of brake resistor

 Danger!

Hazardous electrical voltage

During operation of the standard device and up to 3 minutes after power-off

hazardous electrical voltages may occur at the terminals of t he brake resistor.

Possible consequences:

ƒ Death or severe injuries when touching the terminals.

Protective measures:

ƒ Disconnect the standard device from the mains before working on the brake

resistor.

ƒ Check all power terminals for isolation from supply.

ƒ Select the mounting location so that the operating conditions mentioned in

the mounting instructions for the brake resistor are permanently

guaranteed.

 Danger!

Hot surface

The brake resistor may get very hot. (For temperatures see the mounting

instructions for the brake resistor.)

Possible consequences:

ƒ Severe burns when touching the brake resistor.

ƒ Fire or smouldering fire if flammable material is placed near the brake

resistorormaygettoit.

Protective measures:

ƒ Before working on the brake resistor, check its surface temperature.

ƒ Select the mounting location so that the operating conditions mentioned in

the mounting instructions for the brake resistor are permanently

guaranteed.

ƒ Protect the mounting location through fire prevention.

Protect the brake resistor and controller against destruction caused by overload:

ƒ Establish a safety shutdown using the thermostat of the brake resistor to disconnect

the c ontroller from the mains.

Connecting cable version

ƒ up to 0.5 m: twisted and unshielded

ƒ from 0.5 to 5 m: shielded

– Use shielded cables to meet the EMC requirements.

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Lenze 8400 Manuel d'utilisateur Page 256