Three-Position Disconnector; Three-Position Switch-Disconnector - Siemens NXPLUS C Installation And Operating Instructions Manual

Description
Features
Basic equipment
Additional equipment
Features
Basic equipment
Additional equipment
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9.3

Three-position disconnector

The three-position disconnector combines the DISCONNECTING and READY-TO-EARTH
functions.
Application:
• Circuit-breaker panel 1000 A to 2500 A
• Disconnector panel 1000 A to 2500 A
• Bus sectionalizer 1000 A to 2500 A
In circuit-breaker panels, earthing and short-circuiting the cable connection is completed by
closing the vacuum circuit-breaker.
• Operation via metal bellows or rotary bushings welded without seals into the front of the
switchgear vessel.
Basic version of the three-position disconnector:
• Auxiliary switch, freely available
- In READY-TO-EARTH function with 6NO + 6NC
- in DISCONNECTING function with 6NO + 6NC
• Manual operating mechanism
• Mechanical interlocking to the circuit-breaker
• Motor operating mechanism
• Electromechanical interlock
9.4

Three-position switch-disconnector

Designed as a multi-chamber switch with the functions DISCONNECTING and EARTHING, with
the switch positions: CLOSED – OPEN – EARTHED.
Application:
• Circuit-breaker panel 630 A
• Switch-disconnector panel
• Ring-main panel
• Vacuum contactor panel
• Metering panel
In the following panel types, earthing and short-circuiting the cable connection is performed
by switching the three-position switch-disconnector to EARTHED position.
• Ring-main panels
• Vacuum contactor panels
• Switch-disconnector panels
• Metering panels
• Operation via metal bellows welded without seals into the front of the switching-device
vessel.
Basic version of the three-position switch-disconnector:
• Auxiliary switch, freely available
- in EARTHING function with 6NO + 6NC
- in DISCONNECTING function with 6NO + 6NC
• Manual operating mechanism
• Motor operating mechanism
• Electromechanical interlock
• Mechanical interlocking (fuse compartment cover can only be removed in earthed position)
Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9