Low voltage electrical switchboard

Low-voltage switchboard (LVSB) ORTA is a low-voltage switchboard in an air-insulated metal enclosure designed for three-phase alternating current receipt and distribution at 50 Hz for voltages up to 1 kV, includes overload and short circuit current protection, as well as reactive power compensation, controls, measurements and alarms.

ORTA LVSB are installed in modular metal or reinforced concrete buildings equipped with heating and/or air conditioning systems.

ORTA LVSB are widely used in:

  • substations and power plants;
  • oil field infrastructure facilities;
  • metallurgical works;
  • public utility facilities.
        Major advantages
  • high reliability;
  • convenient installation and operation;
  • one-side and double-side maintenance;
  • high maintainability;
  • rated currents up to 6300 A;
  • internal separation of compartments as per GOST R IEC 61439.2-2012 including 3b and 4b;
  • protection rating up to IP 54 inclusive;
  • use of the draw-out modules enable maintenance of LVSB components in the energized state;
  • provisions to integrate into high level remote control systems;
  • ORTA LVSB are supplied as fully prefabricated units;
  • ORTA LVSB are designed and assembled in SPECENERGO
  • factory in Saint Petersburg;
    minimum service life is 25 years.
Parameter Value
Main circuit current type AC, 3 phase
Rated voltage, kV 0,4; 0,69
AC frequency, Hz 50
Auxiliary circuit current types and voltage ratings (max.)
  • 230 VDC
  • 230 VAC
Rated busbar current, A max. 6300
Grounding system TN-C; TN-C-S; TN-S; IT; TT
Internal separation as per GOST R IEC 61439.2-2012 1; 2а; 2b; 3a; 3b; 4a; 4b
Protection rating as per GOST 14254-2015, IP 21, 31, 42, 54
Maintenance type
  • one-sided
  • double-sided
Parameter, mm Value
Cabinet frame width 200; 300; 400; 500; 600; 700; 800; 900; 1000; 1100; 1200
Cabinet frame depth 600; 800; 1000; 1200
Frame height without pedestal 2000; 2200
Pedestal height 100