Siemens NXPLUS C User Manual

802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11 61/293
Description
For installation on even and rigid concrete or steel structure (without considering building
influences), the tested ground accelerations meet the following requirements:
• Uniform Building Code 1997 (UBC) – Zone 4
• California Building Code 1998 (CBC) – Zone 4
• IEEE 693-2005 - High required response spectrum (Figure A.1).
Shock and vibration
safety (option)
NXPLUS C switchgear can be upgraded to withstand stress caused by shock and vibration. For
upgrading, shock and vibration tests have been carried out in accordance with the following
standards:
• ETSI EN 300 019-2-2; T2.3 Public Transportation
• IEC 60068-2-6, Environmental Testing – Part 2-6:Tests – Test Fc: Vibration (sinusoidal)
• IEC 60068-2-64, Environmental Testing – Part 2-64:Tests – Test Fh: Vibration, broad-band,
random and guidance (noise spectrum according to DNV).
10.4 Selection of HV HRC fuse-links
Note to HV HRC fuse-links According to IEC 60282-1 (2009) Clause 6.6, the breaking capacity of HV HRC fuse-links is
tested within the scope of the type test at 87% of their rated voltage.
In three-phase systems with resonance-earthed or isolated neutral, under double earth fault
and other conditions, the full phase-to-phase voltage may be available at the HV HRC fuse-link
during breaking. Depending on the size of the operating voltage of such a system, this applied
voltage may then exceed 87% of the rated voltage.
To be observed during configuration of switching devices and selection of HV HRC fuse-links:
• Use only fuse-links satisfying the stated operating conditions.
• Use only fuse-links whose breaking capacity was tested at least with the maximum system
voltage.
In case of doubt, select a suitable HV HRC fuse-link together with the manufacturer.
The three-position switch-disconnector in the transformer feeder (transformer switch) was
combined with HV HRC fuse-links and tested in accordance with IEC 62271-105.
The following protection tables show recommended HV HRC fuse-links for protection of
transformers, motors and voltage transformers in the metering panel.
Furthermore, the switchgear also permits fuse protection of transformers up to ratings of
2000 kVA. Please contact us for such applications.
The protection tables are valid for:
• Maximum ambient air temperature in the switchgear room of 40°C according to
IEC 62271-1/VDE 0670-1000 considering the influence of the switchgear enclosure
Requirements according to IEC 62271-105
Protection of distribution transformers according to IEC 60787/VDE 0670-402
Rated power of transformer (no overload operation)
The specified SIBA HV HRC fuses are type-tested partial range fuses according to IEC 60282-1.
The dimensions correspond to DIN 43625. The HV HRC fuses have a thermal protection in
form of a temperature-limiting striker tripping operating in case of defective HV HRC fuse-links
or high overload currents.
Please contact us if you want to use HV HRC fuses from other manufacturers.
The selection of HV HRC fuse-links is based on:
• IEC 60282-1
• IEC 62271-105/VDE 0671-105
• IEC 60787/VDE 0670-402
• Recommendations and data sheets of fuse manufacturers
• Permissible power loss in the switchgear enclosure at an ambient air temperature up to
40° C

Siemens NXPLUS C Specifications

General

Brand	Siemens
Model	NXPLUS C
Category	Circuit breakers
Language	English