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• DOK-POWER*-TVD*1.3****-ANW1-EN-E1,44 • 02.97
3. Electrical Connections
3.20. Heat loss inside the control cabinet
Basic losses in the TVD 1. 3 occur as a result of the generation of signal
voltages and high voltage power.
Basic losses equal 75 W.
14 W per kW of DC bus continuous power in the TVD 1.3-08
17 W per kW of DC bus continuous power in the TVD 1.3-15
Bleeder losses are dependent upon the rotary drive energy, the potential
energy of imbalanced masses and the machine cycle in progress.
Basic losses
Power losses
Bleeder losses
45
40
135
40
Bleeder resistor
300
TVR/Skizze3D
40
Fig. 3.18: Safety clearances inside the control cabinet
Especially when running main drives (2AD; 1MB) check to make
sure that the continuous bleeder power and the maximum
regenerated energy do not exceed the values as listed in the data
sheets.
PRD
= regenerated continous power or bleeder continuous power in kW
t
z
= cycle time in s
W
potg
= sum of the potential energies in kWs
W
rotg
= sum of the rotary energies in kWs
3.21. Safety clearance inside the control cabinet
The bleeder resistor in the TVD 1.3 is hot after power is shut down. Flammable
materials such as cables and cable channels must be kept at a distance of at
least 300 mm above and 40 mm to the side and to the front of the bleeder
resistor.
W
rotg
+ W
potg
t
z
P
RD
=
