Prefabricated chambers one-way service KSO 306 and busbar bridges SHM and SMR for them are intended for switchgear configuration voltage 6 or 10 kV AC frequency 50 Hz with isolated neutral. Type of climatic modification U3 by GOST15150. Normal operation of KSO is ensured when following conditions: 1. Height above sea level - no more than 1000 m; 2. Environment - non-explosive, not containing conductive dust, corrosive gases and vapors in concentrations that reduce the parameters of the KTP within unacceptable limits; 3. Wind speed up to 36 m / s (wind pressure speed up to 800 Pa); 4. Type of atmosphere - II in accordance with GOST 15150. The main circuits of the KSO consist of the following devices; 1. Autogas load switch VN-RA - chambers 03-06, 08.09 and 24; 2. Disconnector with grounding knives RV - chambers 01, 02, 07, 10, 11, 14P, 14L; 3.Vacuum circuit breaker BB / TEL or VR-1 with electromagnetic drive - 12V, 14V and 17V chambers. A set of protections is provided in the chambers - overcurrent protection, overcurrent cutoff, ground fault protection, voltage circuit monitoring, automatic transfer switch (ATS); 4. Voltage transformers - chambers 10 and 11; 5.Transformers for auxiliary needs - cameras 12V, 13V and 23. On request, active and reactive energy metering cabinets are supplied. With a two-row design, the switchgear is completed bus bridges with or without disconnectors (ШМР). Bus bridges are installed only on the outermost chambers. Distance between the facades of the chambers: 2000 mm (ШМР-1, ШМ-1); 2500 mm (ShMR-2, ShM-2); 3000 mm (ShMR-3, ShM-3); 3500 mm (ShMR-4, ShM-4). Connection of cameras to the external network - cable. The chambers are provided with all interlocks in accordance with regulatory documents. An example of ordering a KSO camera made according to scheme 05, with a rated voltage of 10 kV Chamber KSO 306-05 U3 TU U 31.2-14152239-002: 2006, An example of ordering a KSO chamber with a vacuum circuit breaker, made according to the 13 V circuit, with a nominal voltage of 10 kV Chamber KSO 306-13V U3 TU U 31.2-14152239-002: 2006, Example of ordering a busbar bridge with disconnectors with a distance between the facades of the chambers of 2500 mm Bus bridge SHMR-2 U3 TU U 31.2-14152239-002: 2006.