Siemens NXPLUS C User Manual

Operation
192/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
21 Operating the three-position switch
This section describes the switching operations:
• DISCONNECTING and READY-TO-EARTH with the three-position disconnector
• DISCONNECTING and EARTHING with the three-position switch-disconnector
The manual switching operations DISCONNECTING or EARTHING/READY-TO-EARTH must be
preselected. Preselection is only possible if the associated switching operation is permissible
and the interrogation lever is operated.
The operating levers for the three-position switch are coded and identified by color:
• Operating lever for DISCONNECTING operation: Black ball handles.
• Operating lever for EARTHING/READY-TO-EARTH operation: Red ball handles
• The heads of the operating levers for panels with widths of 600 and 900 mm are identified
with symbols:
CAUTION
Internal arcing hazard and explosion hazard
Switching without service readiness can cause serious injury or property damage.
➭ Check service readiness of the switchgear before performing any switching operation. The
pointer of the ready-for-service indicator must be in the green area.
➭ If the pointer of the ready-for-service indicator is in the red area:
- All panel types except circuit-breaker panels: Do not operate the switchgear.
- Contact the Siemens Service Hotline.
INFORMATION
Operating the three-position disconnector
When the circuit-breaker is in CLOSED position, the three-position disconnector cannot be
operated.
➭ Switch the circuit-breaker to OPEN position.
INFORMATION
Switching noise of the three-position switch
• The spring-operated mechanism / spring-operated/stored-energy mechanism (turning the
operating lever by 90°) switches with a loud noise.
• The slow motion mechanism (turning the operating lever by 180°) switches almost without
any noise.
Operating lever for DISCONNECTING operation Operating lever for EARTHING/READY-TO-
EARTH operation
Fig. 156: Symbols on operating lever with
black ball handles
Fig. 157: Symbols on operating lever
with red ball handles

Siemens NXPLUS C Specifications

General

Brand	Siemens
Model	NXPLUS C
Category	Circuit breakers
Language	English