Siemens SIMOVERT MV Series, Инструкции по вводу в эксплуатацию

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54
SIMOVERT MV Commissioning Instructions
4.2.9 Testing the pre-charging via the pre-charging circuit
Before the pre-charging function is tested, the individual protective functions must
have been completely checked. The auxiliary supply must be connected at the
drive converter, and terminal strip X100. It is not permissible to connect the main
supply at the circuit-breaker. The cabinet doors must remain closed.
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The circuit-breaker must be locked-out so that it cannot be closed, and if
necessary, the circuit-breaker should be withdrawn!
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During operation, drive converters can have live, bare, and also moving or rotating
parts as well as hot surfaces, corresponding to their degree of protection.
Severe personal injury or material damage can occur if the required covers are
inadmissibly removed, if the equipment is incorrectly used or is incorrectly installed
and handled.
Additional information is provided in the documentation.
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may be employed to transport, install and
start-up (commission) and service the equipment (observe IEC 364 and CENELEC
HD 384 or DIN VDE 0100 and IEC Report 664 or DIN VDE 0110 and the domestic
accident prevention regulations).
In the sense of basic safety information, qualified specialist personnel are those
personnel who have the training knowhow and qualifications to install, mount,
commission and operate the equipment.
The DC link is pre-charged after the auxiliaries have been switched-in and the
appropriate checkback signals have been received. The auxiliaries are started after
the ON command:
♦
for water-cooled drive converters, the cooling unit
♦
for air-cooled drive converters, the fans
The checkback signal of the external auxiliaries must be connected at terminal strip
X100:45A/45C (only for water cooling). To test the pre-charging, at the first power-
up, the limit for the "pre-charging OK" message in function package GRS at block
M30.X2 must be set to approx. 30 % (do not save in the EEPROM!). If the limit is
reduced, this results in the fact that pre-charging is only executed up to 30% of the
rated DC link voltage. After this limit has been reached, as long as there is no fault
present, the "CLOSE circuit-breaker" command is output. Thus, this test can only
be executed, if the main supply is not connected at the circuit-breaker, otherwise
the equipment could be damaged.
The DC link voltage can be visualized at the operator panel display (calling-up the
DC link voltage actual value, refer to Section 5.2.5). If pre-charging was completed
fault-free, another test should be made with the limit increased up to 80%. After an
ON command, the DC link voltage will increase to 80% and this can be followed on
the display. The CLOSE circuit-breaker command is output after the "pre-charging
OK" message. However, as the main supply has still not been connected at this
time, the DC link voltage will gradually decrease as a result of intrinsic discharge.
This can be seen on the operator panel display. Pre-charging can be aborted at
any time using an OFF command (door-mounted pushbutton), or using the safety
off switch.