Safety
General safety instructions
U-PW powerway System Manual 17
02.03 General safety instructions
Electrical hazards
DANGER
Electric shock
An electric shock results in serious burns and life-threatening injuries and even death.
Prior to starting work on the system, observe the following 5 safety rules:
Disconnect completely (all poles and all sides).
Secure against reconnection.
Verify the absence of voltage.
First earth and then short-circuit.
[1]
Cover or shield any adjacent live parts.
When working on low-voltage systems, the step for earthing and short-circuiting the system may only be omitted if
there is no danger of voltage transmission or feedback.
Minimum qualifications of specialist personnel: electrician / electrically skilled person with ap-
propriate testing experience
Only qualified electricians may select, assemble, install, operate, test, maintain, dismantle, and dispo-
se of components of the enclosure system.
Observe residual energies and static discharge
Prior to starting activities during installation work, disconnect the system and make sure it is statically
discharged before touching the devices. Static voltages can result in personal injuries.
Notes about connections, devices and functional earth
– The functional earth (FE) must be connected to the protective earth (PE) or the potential equalisati-
on. The installer of the switchgear and control gear assembly is responsible for establishing this
connection.
– Connection and signal lines must be installed so that inductive and capacitive interference do not
adversely affect the automation functions.
– The automation technology devices and their controls must be installed so that they are protected
against unintentional operation.
Ensure that the low voltage for the 24 volt supply features safe electrical isolation. Only power supply
units that fulfil the requirements of the IEC 60364-4-41 (HD 60364-4-41, DIN VDE 0100-410) may be
used.
Observe the tolerance of the mains voltage
Observe the specified mains voltage tolerances. Mains voltage fluctuations or deviations from
the nominal value may not exceed the tolerance limits specified in the technical data. If the tole-
rance limits are exceeded, functional failures and hazardous conditions cannot be excluded.
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