CONSTRUCTION AND OPERATING PRINCIPLE:

The VNA switches are intended for activation and deactivation under load of sections of three-phase current circuits with a voltage of 6 (10) kW, a frequency of 50 Hz, and for earthing of disconnected areas with a grounding knife.

The load switch is installed in complete transformer substations (CTS), service chambers (SC), complete distribution devices (CDD).

The VNA switches are related to switches provided with an auto-gas arc-fitting device. The arc shall be extinguished by the flow of gases emanating from the walls of the arc chamber under the action of a gaseous arc.

The control is carried out by a separate drive connected to a load switch mounted at the position where the switch is installed. Type of drive: spring (manual) or electric drive. According to the position of the drive, the VNA can be with a left-hand drive (VNA-L) and with a right-hand drive (VNA-P).

Mechanical life prior to first major maintenance of at least 2,000 operations. The service life of the load breaker is 25 years. The service life of the load breaker is 1,000 cycles.

VNA 10/630-MC I, II, III symbols:

• V (В) – switch
• N (Н) – loads
• A (А) – autogas
• 10 – rated grid voltage, kW
• 630 – rated current, A
• MC – climate design and accommodation category according to GOST 15150 and GOST 15543.1

USAGE CONDITIONS FOR VNA 10/630-MC I, II, III performances:

• ambient temperature from -45°C to +40°C
• altitude not exceeding 1000m
• relative humidity 75% at 15°C, 100% at 25°C
• environment – industrial atmosphere type P
• operating position in space – installation on a vertical plane. A deviation from the vertical position to 5°

SET OF DELIVERIES:

1. The load switch of the auto-gas type SLAS 10/630-MC I, II, III execution – 1 pieces.
2. Passport – one.

Basic technical parameters: