The switchgear complies with the relevant standards and specifications applicable at the time of type tests.

Dielectric strength – The dielectric strength is verified by testing the switchgear with rated values of short duration power- frequency withstand voltage and lightning impulse withstand voltage according to IEC 62271-1/VDE 0671-1 (see table“Dielectric strength”).

The rated values are referred to sea level and to normal atmospheric conditions (1013 hPa, 20 °C, 11 g/m3 humidity in accordance with IEC 60071/ VDE 0111).

The dielectric strength decreases with increasing altitude. For site altitudes above 1000 m (above sea level) the standards do not provide any guidelines for the insulation rating. Instead, special arrangements apply to these altitudes.

Site altitude – As the altitude increases, the dielectric strength in air decreases due to the decreasing air density. This reduction is permitted up to a site altitude of 1000 m according to IEC and VDE.

– For site altitudes above 1000 m, a higher insulation level must be selected. It results from the multiplication of the rated insulation level for 0 to 1000 m with the correction factor Ka.

Example: 1800msite altitude above sea level 12 kV switchgear rated voltage 75 kV rated lightning impulse withstand voltage Rated lightning impulse withstand voltage to be selected 75 kV · 1.10 = 82.5 kV

The switchgear can be used for indoor installation in accordance with IEC 61936 (Power installations exceeding 1 kV AC) and VDE 0101. Outside lockable electrical service locations at places which are not accessible to the public. Enclosures of switchgear can only be removed with tools. Inside lockable electrical service locations. A lockable electrical service location is a place outdoors or indoors that is reserved exclusively for housing electrical equipment and which is kept under lock and key. Access is restricted to authorized personnel and persons who have been properly instructed in electrical engineering. Untrained or unskilled persons may only enter under the supervision of authorized personnel or properly instructed persons.

“Make-proof earthing switches” are earthing switches with short-circuit making capacity according to

• – IEC 62271-102 and
• – VDE 0671-102/EN 62271-102

Internal arc classification

• Protection of operating personnel by means of tests for verifying the internal arc classification
• Internal arcing tests must be performed in accordance with IEC 62271-200/VDE 0671-200
• The switchgear complies with criteria 1 to 5 specified in the mentioned standards for the basic version up to 40 kA.
• Definitions of the criteria: –
  • Criterion 1 Correctly secured doors and covers do not open. Limited deformations are accepted.
  • Criterion 2 No fragmentation of the enclosure. Projection of small parts up to an individual mass of 60 g are accepted.
  • Criterion 3 Arcing does not cause holes in the accessible sides up to a height of 2 m.
  • Criterion 4 Horizontal and vertical indicators do no ignite due to the effect of hot gases.
  • Criterion 5 The enclosure remains connected to its earthing point.

Current-carrying capacity

According to IEC 62271-1/VDE 0671-1 and IEC 62271-200/VDE 0671-200 current carrying capacities refer to the following ambient air temperatures:

• Maximum of 24-hour mean + 35 °C
• Maximum + 40 °C

The current-carrying capacity of the panels and busbars depends on the ambient air temperature outside the enclosure. To attain the maximum rated normal currents, the panels are provided with natural or forced ventilation.

Climate and environmental influences

The switchgear may be used, subject to possible additional measures, under the following environmental influences and climate classes:

• Environmental influences
  • Natural foreign materials
  • Chemically active pollutants
  • Small animals
• Climate classes
  • 3K3
  • 3K5

The climate classes are classified according to IEC 60721-3-3.

Protection against solid foreign bodies, electric shock and ingress of water

SIMOPRIME switchgear fulfills according to the standards

• IEC 62271-200
• IEC 60529
• VDE 0470-1
• VDE 0671-200
• the following degrees of protection:
  • Enclosure: IP 4X, IP 5X (protection against solid foreign bodies)
  • IP X1, IP X2 (protection against ingress of water)
• Compartments:
  • IP 2X (protection against solid foreign bodies)

Higher degree of protection for enclosure on request.

If not stated otherwise on the individual pages of this catalog, we reserve the right to include modifications, especially regarding the stated values, dimensions and weights. Drawings are not binding. All product designations used are trademarks or product names of Siemens AG or other suppliers. If not stated otherwise, all dimensions in this catalog are given in mm. Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.