Siemens 6RA7013-6DV62, Operating Instructions Manual

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05.05 Maintenance
SIEMENS AG 6RX1700-0AD76
13-1
SIMOREG DC Master Operating Instructions
13 Maintenance
WARNING
Hazardous voltage are present in this electrical equipment during operation.
A hazardous voltage may be present at the signaling relays in the customer installation.
Non-observance of the safety instructions can result in death, severe personal injury or
substantial property damage.
When carrying out maintenance work on this converter, please read all safety instructions
included in this section and attached to the product itself.
•
Maintenance work on the converter may be carried out only by qualified personnel who are
thoroughly familiar with all safety notices in this manual and with the installation, operating
and maintenance instructions.
•
Before carrying out visual checks and maintenance work, ensure that the AC power supply
is disconnected and locked out and that the converter is grounded. Before the AC supply is
disconnected, both converters and motors are at hazardous voltage levels. Even when the
converter contactor is open, hazardous voltages are still present.
•
The snubber capacitors might still be carrying hazardous voltage after isolation from the
supply. For this reason, the converter must not be opened for at least two minutes after
switch-off.
Only spare parts authorized by the manufacturer may be used.
The converter must be thoroughly protected against the ingress of dirt so as to prevent voltage
flashovers and this irreparable damage. Dust and foreign bodies, and especially contamination
drawn in through the cooling air flow, must be carefully removed at regular intervals depending on
the degree of pollution, but at least once every 12 months. The converter must be cleaned with dry,
compressed air, max. 1 bar, or with a vacuum cleaner.
Please note the following with respect to converters with forced air cooling:
The fan bearings are designed for a service lifetime of 30000 hours. The fans should be replaced
in plenty of time in order to maintain the availability of the thyristor sets.