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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.

VNA-10 series gas-blast load break switches

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:

  1. load-break switches have no grounding blades;
  2. load-break switches with one grounding blade;
  3. according to the location of the drives;
  4. load-break switches with fuses;
  5. 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).