COS series K-59 is designed for receiving and distributing electrical energy of alternating three-phase current of industrial frequency 50 Hz at a rated voltage of 6 and 10 kV and completing switchgears with a voltage of 6 and 10 kV substations, including complete transformer substations 35/6-10 kV, 110/ 6-10 kV and 110/35/6-10 kV.
To complete the distribution devices installed in the K-59 series COS, cabinets of the K104 or KM-1KF series are mainly used, which are equipped with modern switching, relay and microprocessor equipment from the world’s leading manufacturers.
Technical characteristics of KM-1KF cabinets
Name of parameters |
Parameter values |
Highest operating voltage, kV |
7.2; 12 |
Rated voltage, kV |
6.0; 10.0 |
Type of cabinets used in COS, (main) |
CDD cabinets series K104 and KM-1KF |
Rated current of the main circuits of cabinets used in COS, A |
630; 1000; 1250; 1600;2000; 2500; 3150 |
Rated current of busbars, A |
up to 3150 |
Insulation of live parts |
Air, with non-insulated tires |
Terms of Service |
Double-sided, with control corridor |
Type of linear high-voltage connections |
Cable, overhead |
Cabinet control type |
Local, remote |
Climatic modification and placement category according to GOST 15150-69 and GOST 15543.1-89 |
U1 – with partial thermal insulation; HL1 – |
Degree of protection of the electrical equipment shell in COS according to GOST 14254-96 |
Not less than IP30 |
terms of Use
Climatic version according to GOST 15150-69 |
U1 or HL1 with normal and reinforced external insulation |
Nominal value of climatic factors according to GOST 15150-69 and GOST 15543.1-89
– for execution U1 |
not higher than plus 40°С, with an average daily design temperature not higher than plus 35°С
not lower than minus 45°С not lower than minus 60°С |
Height above sea level |
no more than 1000 m |
Wind speed |
no more than 34 m/s |
Daily temperature difference |
no more than 25ºC |
Sun irradiation intensity |
no more than 1000 W/m2 |
Average monthly relative humidity |
no more than 90% |
Resistance to mechanical stress according to GOST 17516.1-90 |
M39 |
Seismic resistance according to MSK-64 scale |
no more than 9 points |
Ice coating thickness, mm |
no more than 20 |
Degree of air pollution |
II class |
COS series K-59 is not intended for operation in environments subject to increased pollution, exposure to gases, vapors and chemical deposits that are harmful to insulation. Ensuring the normal operation of cabinets in COS series K-59 at sub-zero ambient temperatures is ensured with the help of heating devices.
The heating temperature of parts of the cabinet shell installed in COS series K-59, which can be touched during operation, in nominal mode should not exceed plus 50 ° C. The highest permissible heating temperature for contact connections of cabinets installed in COS series K-59 is plus 75°C (GOST 8024-90).
COS series K-59 is designed for receiving and distributing electrical energy of alternating three-phase current of industrial frequency 50 Hz at a rated voltage of 6 and 10 kV and completing switchgears with a voltage of 6 and 10 kV substations, including complete transformer substations 35/6-10 kV, 110/ 6-10 kV and 110/35/6-10 kV.
Installation of COS series K-59 is carried out on concrete beds and does not require any additional construction work. COS series K-59 comply with the technical requirements and safety and quality requirements of the Organization Standard ST JSC 990640000421-40-2018, interstate standards GOST 14693-90, GOST 12.2.007.4-96, valid in the Republic of Kazakhstan.
KRUN series K-59 are certified for compliance with quality and safety requirements in the State System of Technical Regulation of the Republic of Kazakhstan.