Lenze E82xVxxxKxxxxx - Manual (Page 484)

Braking operation
Braking operation with external brake resistor
8200 vector 0.25 ... 11 kW
13
l
484 EDS82EV903 EN 3.0
13.2 Braking operation with external brake resistor
To decelerate greater moments of inertia or with a longer operation in generator mode an
external brake resistor is required. It converts braking energy into heat.
The brake resistor is connected if the DC−bus voltage exceeds the switching threshold. This
prevents the controller from setting pulse inhibit through the "Overvoltage" fault and the
drive from coasting. The external brake resistor serves to control the braking process at any
time.
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Danger!
Greater residual hazards during operation with accessories.
Possible consequences
ƒ Death, serious injuries or damage to material assets
Protective measures
ƒ Read the documentation for the accessories.
ƒ Please observe the safety instructions and operating conditions provided
therein.
13.2.1 8200 vector 0.25 ... 11 kW
Integrated brake chopper for 8200 vector 0.25 ... 11 kW
The brake chopper integrated in the controller connects the external brake resistor.
The switching threshold of the 400 V 8200 vector controllers can be adapted to the mains
voltage:
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0174
*
s
Switching
threshold −
brake chopper 100 78 {1 %} 110 Only active with 8200 motec 3 ...
7.5 kW and 8200 vector
0.55 ... 11 kW, version for
400/500 V mains voltage
l 100 % = switching threshold
DC 790 V
l 110 % = brake chopper
switched off
l U
DC
= switching threshold in V
DC
l The recommended setting
considers max. 10 % mains
overvoltage
^ 484
Required setting
U
mains
[3/PE AC xxx V]
380
400
415
440
460
480
500
C0174
[%]
78
81
84
89
93
97
100
U
DC
[V DC]
618
642
665
704
735
767
790