MSG11-5715-743/EN: AC20F Series - Hardware Installation Manual
MSG11-5715-743/EN 24.04.2023
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•
It is not permitted to open the inverter for repair or modification. The
inverter STO function is a factory-fitted and factory-tested feature.
Repairs to the inverter STO featured-product are to be carried out only
by Parker authorized repair centres. Any unauthorized attempt to
repair or disassemble the product will render any warranty null and
void, and STO integrity could be impaired.
PARKER WILL NOT ACCEPT ANY LIABILITY FOR FAILURE TO
OBEY THESE INSTRUCTIONS OR FOR ANY CONSEQUENTIAL
INJURY, DEATH, LOSS OR DAMAGE.
Only competent personal with relevant experience are allowed to open
the inverter for making changes to the power filters (i.e. removal of Y-
Caps & VDR earth connections), or fitting optional communication
cards.
If internal connections between the power stack and control card have
been disconnected and reconnected, then the accurate connection
must be checked by starting the motor (running the drive), and by
performing a STO comprehensive check as specified in Section 8.6.1
below.
•
It is important that the inverter product environment including all
aspects of its CE conformance and IP etc., specified elsewhere in this
manual, is maintained to ensure the safety integrity of the STO
function.
•
Should synchronous motors be operated in the field weakening range,
operation of the STO function may lead to overspeed and destructive
overvoltages as well as explosions in the drive. Therefore, the STO
function must NEVER be used with synchronous drives in the field-
weakening range. The user must ensure this condition is prevented.
•
When using synchronous permanent magnet motors, shaft movement
over a small angle is possible if two faults occur simultaneously in the
power section of the drive. This depends on the number of motor
poles. The maximum angle is:
o
Rotary motors: 360° / number of poles.
o
Linear motors: 180° electrically
It is the user’s responsibility to assess, validate and safeguard as
necessary against this potential hazard.
•
If external forces can act on the motor and/or load to cause it to move,
additional measures must be taken by the user to restrain it, for
example a mechanical brake. Examples of external forces are
suspended loads (effect of gravity), and other web-tensioning devices.
This must be respected above all for vertical axes without self-locking
mechanical devices or weight balance.
•
The inverter STO feature does not provide or guarantee any galvanic
isolation in accordance with EN 60204-1 Section 5.5. This means that
the entire system must be isolated from the mains power supply with a
suitable electrical isolation device before any drive or motor
maintenance or replacement procedures are attempted. Note that even
after the power has been isolated, dangerous electrical voltages may
still be present in the inverter. Safe discharge times and details are
specified in
‘Chapter 1: Safety’ section of this manual.
