- Country of manufactureRussia
The loading switch autogas the BHA-10/630 type with the grounding knives
VNA switches are intended for inclusion and shutdown under loading of sites of chains of three-phase current of 6 (10) kV, with a frequency of 50 Hz, and also grounding of the disconnected sites by means of the grounding knives.
The switch of loading is installed in the complete transformer substations (CTS), chambers of service (KSO), the complete distributing devices (CDD).
VNA switches belong to the switching devices supplied with the autogas dugogasitelny device. Clearing of an arch is carried out by a stream of the gases which are emitted from walls of a dugogasyashchy chamber at impact on them of a gasimy arch.
Control is exercised of the separate drive connected with the loading switch mounted on a switch installation site. Drive type: spring (manual) or electric drive. On an arrangement of the VNA drive can be with the left-side drive (VNA-L) and with the right-hand drive (VNA-P).
Mechanical resource before the first capital repairs not less than 2000 operations. A between-repairs resource of 1000 cycles before the first average repair during service life 4 years. Loading switch service life - 25 years.
Structure of the symbol BHA-10/630 U2:
- In - the switch
- N - loadings
- And - autogas
- 10 - rated voltage of a network, kV
- 630 - rated current, And
- U2 - a climatic modification and category of placement in accordance with GOST 15150 and GOST 15543.1
Switches of loading are manufactured in the following executions:
- without the grounding knives and without safety locks
- with one grounding knife without safety locks
- with two grounding knives without safety locks
- with one grounding knife with safety locks
- with two grounding knives with safety locks
- temperature of air is from -45 °C to +40 °C
- height above sea level no more than 1000 m
- relative humidity of air of 75% at 15 °C, 100% at 25 °C
- environment - the industrial atmosphere like P
- working position in space - installation on the vertical plane. The deviation from vertical position to 5 ° is allowed
|Name of parameter||Unit-ism.||Value|
|Nominal initial rate of a periodic component of through current of short circuit||kA||20|
|Weight with the grounding knives (with the grounding knives and safety locks)||kg||52 (87)|
|Overall dimensions (overall dimensions with safety locks), length x width x height||mm||613x740x480 (1112x740x480)|
|Service life before write-off||years||25|