Chapter Four：electrical Control System And Circuit; Low Voltage Power Supply And Peripheral Connection Request.14 - Baldor BD Series User Manual

BALDOR AIR COMPRESSOR
3 cooling system process
Screw air compressor is divided into air cooling type and water cooling type, through the fan or
water forcing cooling.
Air cooling system consists of cooling fan, oil coolers and air cooler. The cooled air is pumped into
the fan; go through oil cooler and air cooler, and at the same time, cool and compressing lubricating oil and
air. Please pay attention to the cleaning and maintaining of the cooler surface.
Water cooling system mainly consists of the water cooler, including oil-water cooler and air-water cooler,
cooling air and oil at the same time. The water supply system is installed by the customer. Please pay
attention to the cooling water managing.
Chapter Four: Electrical Control System And
a、Low voltage power supply and peripheral connection request
1、Low voltage power is alternating current three phase 380V, 50Hz.
2 、
Voltage drop will be no more or no less than 5% of the rated voltage, and the phase voltage
variance is within 3%. And there should be phase sequence protecting line.
3、
Compressor power supply must be equipped with isolating switch, in order to prevent the short
circuit resulting of default phase operation.
4 、
Check the secondary circuit fuse, and choose proper no wire safety switch according to the
compressor power watt level.
5、
Our air compressor user power line size is in the list below.
Compressor
model.
HP/KW
7.5/5.5
10/7.5
15/11
20/15
Circuit
Line size
voltage
frequency
（Hz）
（V）
380 50
380 50
380 50
380 50
14
maximum
line
current
（mm
（A）
15
20
29
35
size
2
）
6
6
10
10