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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23 371

12 Components in the DC bus

12.6 Brake resistor selection

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12.6.4 IP enclosure

The brake resistor can be jeopardised by the ingress of objects, dust, and liquids.

• Select an enclosure which ensures that the brake resistor is sufficiently protected against the in-

gress of objects, dust, and liquids.

Excerpt from DIN 40050

Protection against accidental contact/protection against ingress of solid foreign bodies

Protection against water

Enclosure Function

IP 2x Protection against ingress of solid foreign bodies with a diameter greater than 12 mm (medium-

sized foreign bodies).

Keeping away fingers or similar objects.

IP 5x Protection against harmful dust deposits.

• The ingress of dust is not prevented, but the dust shall not enter in such quantities that the op-

eration of the apparatus is affected (dust-protected).

Complete protection against contact.

IP 6x Protection against the ingress of dust (dust-proof).

Complete protection against contact.

Enclosure Function

IP x3 Protection against water falling at any angle up to 60° from the vertical (splashing water).

IP x4 Protection against water splashing against the apparatus enclosure from any direction (splashing

water).

IP x5 Protection against a water jet directed against the enclosure from any direction (water jet).

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