Description
10/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
Description
6 Features
Technology • Factory-assembled, type-tested and metal-enclosed switchgear for indoor installation
• Stainless-steel vessel welded gas-tight
• Gas-insulated switching-device compartment
• Cable connection and busbar, single-pole insulated
• Installation and extension of the switchgear possible without SF
6
gas work
• Screened busbar, silicone-rubber insulated
• Cable connection from front with cable plugs
• Maintenance-free under normal operating conditions
Insulating gas SF
6
Sulfur hexafluoride SF
6
is used as insulating gas. SF
6
insulates live parts between each other
and against the vessel wall. For panels with switch disconnector, SF
6
serves also for
extinguishing the internal arc.
The switchgear is delivered ex works with SF
6
filling, ready for service. The SF
6
filling is
provided to last the total service life of the switchgear.
No gas work is required for installation on site and later extensions.
Filling quantity as per rating plate.
Personal safety • Safe-to-touch due to metal enclosure of live parts
• Clear mimic diagram with mechanical position indicators
• HV HRC fuses are only accessible when outgoing feeders are earthed
• Logical mechanical interlocking
• Capacitive voltage detecting system to verify safe isolation from supply
• Earthing of outgoing feeders by means of make-proof earthing switch (this does not apply
to disconnector panels)
• Resistance to internal arcing
- Pressure-resistant design of connection compartments
- Rear pressure relief duct (optional for wall-standing arrangement)
Security of operation and
availability
• Hermetically sealed primary enclosure independent of environmental effects, such as
pollution, humidity and small animals
• Welded switchgear vessel, sealed for life
• Operating mechanisms of switching devices accessible outside the switchgear vessel
• Maloperation is practically excluded due to interlocks and logical arrangement of operating
elements
• Self-monitoring ready-for-service indicator, easy to read, independent of temperature and
environmental pressure variations, with contactless measured-value acquisition and with
signaling switch (option) 1 changeover contact for telecommunication
• Minimum fire load
• Switchgear vessel designed as "sealed pressure system" according to IEC 62271-200, i.e. the
insulating gas filling requires no maintenance
Cost-efficiency Extremely low "lifecycle costs" and maximum availability thanks to:
• Maintenance-free design under normal operating conditions (for the service life)
• Minimum space requirement
• Long service life
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