Safety instructions
8/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
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
3 IT security
The Siemens software is regularly checked for safety. If weak points are identified in the
process, which may allow third parties to access protection devices, information thereto is
distributed through the SIPROTEC and SICAM Security Update Report Newsletter.
The Newsletter can be subscribed to at the following website:
www.siemens.com/gridsecurity
Before commissioning the switchgear, it must be verified that the current firmware version is
installed on the protection devices. The latest version of firmware can be obtained from the
following website:
http://w3.siemens.com/smartgrid/global/en/products-systems-solutions/downloads/
Pages/Overview.aspx
For information to updates for other makes of protection devices, please contact the
respective manufacturer.
WARNING
High speed moving parts
Can 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 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:
- Actuate the manual OFF pushbutton.
- Actuate the manual ON pushbutton.
- Actuate the manual OFF pushbutton again.
➭ Check if the "spring charged" indicator shows "spring charged".
Fig. 1: "Spring not charged" indication
Fig. 2: "Spring charged" indication
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