Service Manual for Medium Frequency Sine-wave Filters
GB-4
Danger by
high voltage
KEB electronics components contain dangerous voltages which
can cause death or serious injury. In operation, drive converters,
depending on their degree of protection, may have live, uninsulated,
and possibly also moving and hot surfaces.
In case of inadmissible removal of the required covers, of improper
use, wrong installation or maloperation, there is the danger of
serious personal injury and damage to property.
2.
Service notes
2.1
General
The present service manual describes necessary steps at maintenance and repair of medi-
um frequency sine-wave filters.
The following checks must be done.
•
Capacity test of the capacitors
•
Insulation test of the choke
2.2
Required tool
•
Torque spanner with diverse uses
•
Capacity measuring device
•
High voltage tester
Additional equipment for the change of the capacitors
•
Knife
•
Hot-air fan
•
Heat-shrinkable tube
2.3
Life expectancy - exchange of the capacitors
The maximum life expectancy of the capacitors amounts to100,000 operating hours. After
that the capacitors must be exchanged.
This information can deviate downwards dependent on the respective operating mode.
Whether an exchange is necessary results by the following measurement.
2.4
Checking of the sine-wave filter
2.4.1
Preparations
•
switch system de-energized
•
secure against restart
• await five minutes for discharge of the capacitors
• clean sine-wave filter from dust and other contaminations
