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DC−bus operation

EMC in DC−bus operation

Compliance with EMC category C3 (industrial premises)

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120

EDS700ACBA EN 4.0

7.7 EMC in DC−bus operation

7.7.1 Compliance with EMC category C3 (industrial premises)

Applications for the "second environment" on industrial premises must comply with EMC

category C3.

Observe the conditions for the compliance with EMC category C3:

ƒ The permissible motor cable length is £ 50 m for each axis.

ƒ The maximum sum of all motor cable lengths (S l

mot

) must be observed.

ƒ Without a mains choke: 4 axes x 50 m = 200 m

– Switching frequency: 4 & 8 kHz

ƒ With the mains chokes assigned: 10 axes x 50 m = 500 m

If the number of axes deviates, S l

mot

can be determined from the following diagram.

C3-MC

C3-NR

50 100 150 200 250 300 350 400 450 500

l [m]

mot

E70EMCX001 b

Fig. 7−2 Motor cable lengths for the compliance with category C3

n Number of axes

S l

mot

Sum of the motor cable lengths ...

C3−NR without mains chokes, according to the number of axes, for switching

frequency 4 & 8 kHz

C3−MC with mains chokes, according to the number of axes

1 2 ... 115 116 117 118 119 120 121 122 123 124 125 ... 158 159

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Lenze i700 Manual Bedienungsanleitung Seite 120