Operating Instructions

Safety
Safety equipment
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118
Siemens
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Smart Infrastructure 2021-10-11
3.2 Safety equipment
WARNING
Danger to life due to safety
equipment malfunctions!
If safety equipment fails to function properly or is deactivated or disabled, the
device can pose a risk of extremely serious injury or death.
Failure to provide a proper protective conductor connection can affect the ability
of protective equipment to function correctly.
● Ground the device in compliance with the applicable regulations.
● The variable speed drive can cause a DC current in the PE conductor. At
locations at which a residual-current device (RCD) or a residual current
monitor (RCM) is installed in order to protect against direct or indirect contact,
the RCDs or RCMs on the supply side of the variable speed drive must all be
type B super-resistant devices.
The following safety equipment is installed as standard:
● Overcurrent protection device
The following safety devices can be optionally provided (depending on the
application) by the machine manufacturer/operator:
● Residual current devices
● Residual current monitor
● Maintenance switch which either de-energizes the variable speed drive or
interrupts the connection between the variable speed drive and the motor
(motor cable).