Enclosed Busbars Micro Positive Pressure Equipment

Enclosed busbars micro positive pressure equipment

Closed busbars micro positive pressure device

Purpose and function of using closed busbar micro positive pressure device

1.Purpose: To improve the overall healthy operation level of the bus duct.

2.Function: The device generates a micro positive pressure inside the shell of the phase-isolated busbar slightly higher than the outside atmosphere, so that moisture, dust, salt mist, etc. in the outside can not enter into the shell of the phase-isolated busbar, so that working environment of the insulator, the shell and the conductors is always kept clean and dry. So as to ensure and improve the insulation strength of the bus duct to ensure safe and reliable operation.

It Prevents the impact of temperature changes. Breathing effect on the busway will be happened for the busbars in the north, hot and humid, and coastal areas due to changes in operating and shutdown temperatures and changes in day and night and seasonal temperature differences. The humid air with dust and smoke will enter into the busbar housing to reduce the insulation strength of the closed busbar, and bring hidden dangers to safe operation.

In summary, in order to improve the overall healthy operation level of the closed busway, a micro-positive pressure device should be put into operation. This device requires a certain air tightness of the closed busbar casing to ensure the positive pressure inside the busbar casing. Poor air tightness of the closed busbar casing will cause frequent or long-term operation of the device and increase energy loss and device failure rates.

Main technical parameters

Micro positive pressure device supporting equipment

Air source: (Must use oil-free air compressor or install oil filter before the device)

Oil-free air compressor: provide air source for the device

Air tank

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Closed busbar

Micro positive pressure hot air circulation maintenance device

When the generator stops and the bus duct stops power transmission, the temperature of the air in the busbar decreases to its corresponding dew point temperature, dew condensation will occur. Even local freezing in the transformer side busbar for cold areas with a large temperature difference between day and night. This will seriously affect the safe operation of the busbar. In order to prevent dew condensation and freezing, the closed busbar micro positive pressure hot air circulation maintenance device operates the hot air maintenance function when the generator is stopped and the busbar stops transmitting power. It uses highly dry hot air to replace the air in the busbar, and quickly reduces the relative humidity of the air in the busbar, improve the insulation level of the equipment in the busbar, ensure the safety and success rate of re-inputting of the closed busbar for power transmission. And run the micro positive pressure air filling function when the generator is starting and the busbar is transmitting. The automatic operation of the hot air maintenance function is controlled by a humidity meter. When the humidity meter detects that the relative humidity of the air in the closed busbar has reached the setting value or higher, the micro positive pressure hot air circulation maintenance device automatically input the hot air maintenance function. When the relative humidity of the air drops below the setting value, the device automatically stops the hot air maintenance function. When the generator is starting and the busbar is transmitting, the micro-positive pressure inflation function automatically runs, and the micro-positive pressure function is automatically controlled by the humidity meter and time controller.

Closed busbar air circulation drying device

Intelligent common box enclosed bus duct

Dust removal and dehumidification device