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Common description
Switchboard panels of SPO 70 and SPO 90 series are designed for admission and distribution of the energy with the voltage to 660V of the alternate current with the frequency of 50 Hz and for outgoing lines protection against overcharge and short circuit in the earth and neutral connected networks. The cabinet units are designed for installation on the industrial projects and in the transformer substations. They are made for one way service floor encased wire-frame and hinged frameless discharge.
External appearance
Characteristics
Nominal voltage of the alternate current - 660/380V,
Frequency- 50 Hz.
Nominal current up to 2000 А.
Protection level: with open doors: IP00, with close doors: IP21.
Conventional thermal current of the cabinet bus bars not less than 40 kА.
Mechanical bracing current of the cabinet bus bars of 20, 40 kА.
Switchboard panels of SPO series are designed for operation under the next condition:
- in the influence of the climate factors of the outdoors environment in the macroclimate regions with the temperate climate indoors with the natural or artificial ventilation and also indoors with the increased humidity;
- attitude above sea level not more than 2000 m, with the attitude more than 1000 m the rated operating current is to be decreased on 10%. The operational position of the cabinet unit over a distance is vertical with the tolerance limits from it to any side on 5°.
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