4. Installation
MV3DB Series DB Units
ALSPA MV3000e Dynamic Braking Units
(07/06)
Page 4-2
4.3
Installing the DB Unit
CAUTION
Ensure that all conductors connected to this equipment are mechanically restrained.
4.3.1
Cable Lugs and Recommended Torque Settings
Copper or plated copper cable lugs may be used. Table 4-1 shows the size of drive studs and
recommended connector lugs/torque settings.
Table 4-1 Drive stud sizes, cable lugs and torque settings
Drive
Frame Size
Stud Size
Use Lug Size
Torque Settings
Nm lbf
in
3
M6
M6 or 1/4 in.
8
70
4
M8
M8 or 5/16 in.
15
130
6
M10
M10 or 3/8 in.
30
265
7
M12
M12 or 1/2 in.
45
400
WARNING
•
Wait at least 5 minutes after isolating supplies and check that voltage between
DC+ and DC- has reduced to a safe level before working on this equipment.
•
This equipment may be connected to more than one live circuit. Disconnect all
supplies before working on the equipment.
•
All items exposing high voltage must be placed in a suitable enclosure with
restricted access.
•
Air used to cool the product is unfiltered. Air ejected from the product may
contain foreign particles. Air outlets should deflect the air away from the eyes.
•
Surfaces on dynamic braking resistors can reach high temperatures and remain
hot for some time after power has been removed.
•
The combined audible noise emitted by fans in an installation can be greater than
70 dB(A), dependent on the air flow path.
Measure the audible noise level in the installation.
When the audible noise level exceeds 70 dB(A), appropriate warning notices
should be displayed.
