VNA-10 series gas-blast load break switches
VNA-10/630-20 N2 series gas-blast load-break switches are designed for switching on-load three-phase 630 A current sub-circuits with a commercial frequency of 50 Hz and rated voltage of 10 kV.
Climatic category is U (N) according to GOST 15150; placement category is 1 according to GOST 15543.1 for the disconnectors of IP00 protection rating according to GOST 14254-96. The disconnectors of this series are made in three-pole versions.
VNA series gas-blast load-break switches are used in switchgear & controlgear cabinets, indoor package transformer substations, and unilateral maintenance collection chambers.
The design of the load-break switches is as follows:
- load-break switches have no grounding blades;
- load-break switches with one grounding blade;
- according to the location of the drives;
- load-break switches with fuses;
- load-break switches without fuses.
Engineering data:
|
Parameter name
|
Value
|
|
Rated voltage, kV
|
10
|
|
Maximum operating voltage, kV
|
12
|
|
Rated current, A
|
630
|
|
Rated breaking current at соs φ ≥ 0.7, A
|
630
|
|
Maximum breaking current at соs φ ≥ 0.7, A
|
800
|
|
Maximum current (short-time electrodynamic current), kA
|
51
|
|
Rated initial value of the periodic component, kA
|
20
|
|
Current lead time (short-circuit time), sec
|
1
|
|
Active current equal to the rated breaking current at соs φ ≥ 0.7, A
|
630
|
|
Closing time, no more than, sec
|
0.05
|
|
Break time, no more than, sec
|
0.12
|
|
Time between mechanical overhaul, no less than, number of operations
|
2000
|
|
Switching capacity in normal operating conditions, number of breaks
|
10
|
|
Force applied to the drive, no more than, N
|
245
|
|
Operating temperature range, °С
|
-45….+40
|
|
Overall, mounting and fitting dimensions, no more than, mm:
|
|
|
Without fuses:
- length
- width
- height
|
613
740
480
|
|
With fuses:
- length
- width
- height
|
1102
740
480
|
|
Weight:
- of the circuit breaker, no more than, kg
- of the drive, no more than, kg
|
90
5
|
|
Life until discarded, years
|
25
|
The load-break switches are made with porcelain and polymer insulators. The load-break switches are made on the basis of design drawings and technologies of the Group of Companies “Electroschield TM-Samara” Joint-Stock Company
Made in accordance with the Technical Specifications TSh 64-00212883-002:2006.
The product has been certified by the National Certification System of the Republic of Uzbekistan and Certification System of the Russian Federation (GOST-R).