БУАВР.ЭА — NPP "VEL"

БУАВР.ЭА automatic transfer switch controller

Purpose:

The БУАВР controls the automatic transfer from the main supply to the standby supply and back, on impermissible phase voltage deviations, phase imbalance or asymmetry, a change in phase sequence, or the loss of one or more phases in the "main" or "standby" network.

The БУАВР can be used in distribution networks as part of:
- automatic transfer switching (ATS);
- emergency transfer switching.
The БУАВР monitors incomer status, controls magnetic contactors and motor-operated circuit breakers, indicates input and output status, and starts, stops and automatically restarts the generator set.
The БУАВР is built to climatic category У, placement category 2 per ДСТУ ГОСТ 15150-69, and is designed to operate at temperatures from -25°C to +55°C, relative humidity up to 80% and atmospheric pressure from 650 to 800 mm Hg.
The БУАВР is intended for operation in a non-explosive atmosphere, free of gases and vapours in concentrations that attack metal and insulation, and free of saturated water vapour and conductive dust.
Resistance to external mechanical factors — per ДСТУ ГОСТ 17516.1, group М6
Permissible vibration: 1 to 35 Hz at an acceleration of no more than 4 m/s².
The БУАВР is supplied from the monitored network whenever voltage is present on one of the phases of either incomer.
When used in an ATS with motor-operated circuit breakers, an additional control power source is recommended.
The БУАВР connects directly to 0.4 kV networks.
Connection to networks of 6 kV and above requires step-down transformers with a 100 V nominal secondary voltage (the БУАВР version with a 100 V input).