Siemens NXPLUS C Installation And Operating Instructions Manual page 8

Safety instructions
Five Safety Rules of
Electrical Engineering
Hazardous substances
Personal protective
equipment (PPE)
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The Five Safety Rules of Electrical Engineering must be complied with during operation of the
products and components described in these operating instructions:
• Isolate.
• Secure against reclosing.
• Verify safe isolation from supply.
• Earth and short-circuit.
• Cover or barrier adjacent live parts.
If hazardous substances are required to perform the work, the relevant safety data sheets and
operating instructions must be observed.
For switchgear with proof of internal arc classification according to IEC 62271 Part 200,
no personal protective equipment must be worn for operating the switchgear.
For switchgear without proof of internal arc classification according to IEC 62271 Part 200,
personal protective equipment must be worn for operating the switchgear.
If covers have to be removed to work on switchgear, personal protective equipment must be
worn. In case of internal arc, full personal protection is not provided, even if the personal
protective equipment is worn.
To select the protective equipment, the local laws and regulations must be observed and
accomplished.
The personal protective equipment consists of:
• Protective clothing
• Safety shoes
• Gloves
• Helmet and face protection
• Ear protection
Removing the front cover from the operating mechanism compartment
Risk of injury due to high-speed moving parts
Parts behind the front cover can automatically move quickly and cause serious injury. Do not
remove the front cover of the operating mechanism until the following actions have been
performed:
➭ To avoid impermissible switching operations, switch off auxiliary voltage, e.g.:
- Switch off the auxiliary voltage supply of the motor.
- Trip the MCB.
- Disconnect the control cables from the low-voltage compartment.
➭ To discharge the spring energy store in the operating mechanism, execute the following
instructions:
- Push the manual OFF pushbutton.
- Push the manual ON pushbutton.
- Push the manual OFF pushbutton again.
➭ Check if the "spring charged" indicator shows "spring not charged".
Fig. 1: "Spring not charged"
indication
Revision 02 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 806-9004.9
WARNING
Fig. 2: "Spring charged"
indication