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Functional Safety – Supplemental manual for series SK 300P
3 Assembly and installation
The installation instructions contained in this manual only deal with issues that are related to functional
safety. For further information, please refer to the manual for the relevant frequency inverter (BU
0800).
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3.1 Installation and assembly
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The frequency inverter must comply with protection class IP55 or IP66 as a painted version.
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3.2 Electrical connection
The information for installation or electrical connection from the manual BU 0800 as well as all of the
following information must be observed.
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WARNING
Touching electrically conducting components may cause an electric shock and severe or possibly fatal injury.
•
Disconnect the frequency inverter from the power supply before starting installation work.
•
Only work on devices which have been disconnected from the power supply.
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WARNING
The frequency inverter carries hazardous voltage for up to 5 minutes after being switched off.
•
Only start work after a waiting period of at least 5 minutes after switching off the mains supply
(disconnection).
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3.2.1 Mains connection
Devices for implementation of a safety function must only be operated on TN or TT networks.
Grounded Corner operation is not intended.
For operation in IT networks, the device needs to be configured by adaptation of the integrated line
filter. Modification of the mains filter is performed at the factory and must be taken into account in the
order. Configuration for IT networks reduces the EMC.
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NOTICE!
Operation in IT networks
If a mains fault (short-circuit to earth) occurs in an IT network, the link circuit of a connected frequency
inverter may become charged, even if it is switched off. This results in destruction of the link circuit
capacitors due to overcharging.
•
Connect a braking resistor to dissipate excess energy.
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Electric shock
Electric shock
BU 0830 en-4121
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