MV3DB Series DB Units
5. Commissioning
(07/06)
ALSPA MV3000e Dynamic Braking Units
Page 5-1
5. Commissioning
CAUTION
High voltage insulation tests can damage this equipment. Cables/external components
to be insulation tested must be disconnected from this equipment.
5.1 Installation
Assumptions
The commissioning procedure assumes that the DB Unit and the braking resistor have been
correctly installed as described in Section 4.
5.2 Commissioning
Procedure
Note:
The drive parameters associated with the DB Unit and braking resistor, and which are required
for commissioning, are contained in Section 5.3.
5.2.1 Mechanical
Checks
Check that the DB Unit has been installed in accordance with the instructions given in Section
4.
5.2.2 Power
Connections
Ensure the drive is fully serviceable before installing the DB Unit.
Check that the correct DB Unit is fitted – see
Error! Reference source not found.
.
Ensure that:
–
The cabling between the DB Unit and the braking resistor is adequate for the duty –
see Section 3.7 .
–
The connected braking resistor is within the range detailed in Section 2.1
(Specifications).
5.2.3 Procedure
Apply power to the drive but do not enable the output (i.e. do not run the motor).
–
Check that current does not flow in the DB Unit output cables.
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.
•
All items exposing high voltage must be placed in a suitable enclosure with
restricted access.
•
This equipment may be connected to more than one live circuit. Disconnect all
supplies before working on the equipment.
•
Do not use mobile phones or walkie talkies within 2 metres (6 feet) of the
equipment.
•
Surfaces on 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.
