Introduction and Important Notes Nur für den internen Gebrauch
A31003-H3590-S100-7-7620, 06/2012
1-10 HiPath 3000/5000 V9, Service documentation
inform.fm
safety information and warnings
7
WARNING
Disconnection from power circuit(s)
A disconnect device can be a disconnecting switch (main switch), circuit breaker
(fuse/cutout), or power plug that completely disconnects the telecommunication sys-
tem and device from the power circuit.
● Before carrying out any work on the communication system or on the device,
find out whether there is a disconnect device and locate it.
● When you need to disconnect the power supply to the communication system
or device, you do so using the disconnect device.
● Secure the disconnect device mechanically so that it cannot be used by other
persons and attach a sign reading DO NOT OPERATE to the disconnect de-
vice.
● Ensure that the communication system or device is not powered from an addi-
tional power source (for example, an uninterruptible power supply), or that it is
protected by an additional fuse or an additional main switch.
● If you are performing work on circuits with hazardous voltages, always work to-
gether with a partner who is familiar with the location of the disconnect devices
for the power supplies.
● Always disconnect the power supply when you are working directly next to a
power supply unit or direct current converter, unless the work instructions ex-
pressly permit you to work without disconnecting the power supply.
● High voltages capable of causing shock are used in this equipment. Be ex-
tremely careful when measuring high voltages and when servicing cards, pan-
els, and boards while the system is powered on.
● Metallic surfaces such as mirrors are conductive. If you touch them, there is a
risk of electric shocks or short circuits.
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