KSO-299М SERIES COLLECTING CHAMBERS OF UNILATERAL MAINTENANCE
The KSO series chambers with the 6 and 10 kV nominal voltage and 50 Hz three-phase alternating current are designed for application in network distribution devices with an insulated neutral point or with a neutral point grounded by means of a ground-fault neutralizer.
Depending on the primary circuit diagram, the chamber may include the following devices:
a. breakers: VV/ТЕL-10, VB-10, VVU-10, VD4, Evolis, etc.
b. 400, 630, 1000 А disconnection devices;
c. TOL-10 series current transformers (may be replaced with other types of transformers) with the capacity of 20, 30, 40, 50, 75, 80, 100, 150, 200, 300, 400, 600, 800, 1000 А;
d. NOM, NOL, NAMI, NAMIT, NTMI, 3хЗNOL-06 series voltage transformers;
e. ТМ-25, 40; ТSКS-25, 40; ОL-0,63-4,0; ОLSP-0,63-1,25 series power transformers;
f. KVT-10 series vacuum contactors.
Auxiliary circuits are based on an electrical-mechanical relay or microelectronic and microprocessor type protective relays according to the typical circuits of the leading design institutes.
The chamber contains all the necessary blocking systems necessary to avoid errors related to maintenance and repair works.
Nominal values of climatic factors of the ambient environment: the ‘moderate’ climatic version of the 3 category according to GOST 15150-69 and GOST 15543.1-89.
The chambers are designed for indoor operation under the following conditions:
a. ambient air temperature from -25С to +40С;
b. altitude above the sea level up to 1000m;
c. the environment is non-explosive, it doesn’t contain current-conducting dust, aggressive gases or vapors in concentrations that may lead to destruction of metals and insulation.
Parameter name VALUE
Nominal voltage, kV
The highest operating voltage, kV
Nominal current of primary circuits, А
400; 630; 1000
Nominal current of busbars, А
630; 1000; 1600
Nominal current of current transformers, А
Nominal current of opening of breakers, кА
Short-time thermal current, кА
Short time electrodynamic current *, кА
Protection degree according to GOST 14254-96
not more than 600
* Note: the thermal and electrodynamic resistance of current transformers are defined according to their technical data.