KSO-6 (10) kV chambers with aerial insulation, gas-insulated disconnector and vacuum circuit breaker

KSO chambers forms the system of modular chambers with aerial insulation of cable and busbar cells, gas-insulated load-break switches, grounding switches with aerial insulation, vacuum circuit breakers, measuring voltage and current transformers, control, protective and measuring devices. The different combinations of devices correspond to different versions.

The chambers are designed for switchgears at the rated voltage 6 or 10 kV of the three-phase alternating current with the frequency of 50 or 60 Hz of systems with the insulated neutral or grounded through the arcing ground suppressor or resistor.

The chambers can be used as bushing devices in complete transformer substations 6(10)/0.4 kV.

Due to reduced overall dimensions they can be installed in any compact, mobile or underground switchgears and substations. Modular design makes KSO chambers the ideal solution for updating and extension of the existent substations and switchgears.

1.3 Standards compliance

KSO-6 (10) chambers meets the requirements of:

-GOST 12.007.0-75, GOST 12.007.4-75, GOST 1516.3-96, that is proved by conformance certificate № РОСС.RU.АИ18.В08563;

-technical conditions ТU 3414-008-00109458-2005

- Regulations of electric units arrangement (PUE)

2. TECHNICAL FEATURES

2.1 Basic parameters, overall dimensions and weight of KSO chambers

Parameter designation

Dimension

Rated voltage, kV

6.0

10.0

Maximum operation voltage, kV

7.2

12.0

Main circuits’ rated current, A

400;630

Busbars’ rated current

630;800;1000

Peak withstand current, kA

51

Short-time withstand current during 1 s, kA

20

Rated current of tripping of vacuum circuit breakers, kA

16;20

Testing voltage of composite lightning impulse, kV

60

75

Rated current of safety fuses, A

6.3; 10; 16; 25; 31.5; 40; 50; 63; 80; 100; 125; 160; 200

Rated current of cutout fuse of power fuses, kA

6.3 , 160 A

63

200 A

50

Rated current of current transformers, A

50; 75; 100; 150; 200*; 300; 400; 600

Rated voltage of secondary circuits, V

direct current

24; 110; 220

alt.current

220

lighting (a.c.)

220

Type of covers and protection degree acc. to GOST 14254

IP31

Overall dimensions, mm

width

375, 500, 600, 750

depth

900, 1250

height

without BRZ

1670

with BRZ

1870

Chamber weight max, kg

340

(*) The values of peak withstand current and short-time withstand current of the chamber are determined by the value of peak withstand current and short-time withstand current of the current transformers. The values of 51 kA and 20 kA correspond to the current transformers with rated current of 200 A and more.

2.2 KSO chambers execution

Name of grading factor

Execution

KSO chambers type depending on switching devices type

In compliance with main circuits schemes

Busbar system

With one busbar system

The way of phase separation

With unseparated phases

Insulation level acc. to GOST 1516.3

with normal insulation

Busbars insulation

with insulated busbars

with uninsulated busbars

Connection design

With cable connection

With bus connection

Kind of installation

For indoor installation

Environmental protection type

Without special protection

Service conditions

Of single-sided service

Rated dimensions of climatic parameters – according to GOST 15150, GOST 15543.1:

ambient air temperature – from 0 0C till +40 0C for U3, UHL3;

ambient air temperature – from 0 0C till +35 0C for UHL4;

ambient air temperature – from 0 0C till +45 0C for T3;

altitude level above sea max – 1000 m (over 1000 m – special execution);

the environment is not explosive, without current-conducting dust, aggressive evaporation and gases, that can be harmful for metal and insulation.

relative humidity – not more than 80% at +20 0C.

Note. If the mounting of KSO chambers in the place with ambient air temperature under 0 0C is necessary, then installation of heating elements (thermostats) must be provided to ensure the normal temperature conditions of the equipment operation. Mechanical strength of KSO chambers in the sense of influence of mechanic environmental factors must be correspond to M6 group of service conditions according to GOST 17516.1. Normally KSO chambers are of continuous running duty. Insulation resistance and electric strength of main and auxiliary circuits meet the following requirements:

Name of the circuits

Insulation resistance, megaohm, no less than

Testing voltage, kV

Test duration, min

secondary circuits (without lighting)

1

2

1

6-kV circuits (without dischargers)

1000

32

1

10-kV circuits (without dischargers)

1000

42

1

3 TECHNICAL DESCRIPTION

List of KSO chambers types is given in the table below.

№

Chamber type

Chamber function

DS-TA

chamber of lead-in, outgoing lines

DS-SA

sectional chamber

RM-F

measuring chamber with voltage transformer

SF

chamber of outgoing lines with load-break switch and safety fuse, transformer protection

LS

chamber of load-break switch and grounding switch

L

chamber with load-break switch of lead-in and outgoing lines

LT

chamber with grounding switch of cable lead-in and outgoing lines

R

chamber of cable lead-in and outgoing lines

TF1

chamber of transformer 25-40 kVA