DA Series
Operation Manual
12
the sectional area of the power line is too large, it can be replaced with two or more power lines.
Each power line shall be three-phase balanced while using multiple power lines; otherwise it may
result in overheating cable and unbalanced synthesized voltage. The input supply voltage shall be
kept within ±10
％
of the nominal voltage and the three-phase voltage difference shall be within
3%.There must be proper earthing wire connected with the air compressor, otherwise noise may be
connected to any control system in series and cause interference. If the earthing connection cannot
be improved, the values of temperature, current and voltage of the controller may fluctuate.
KW
Specifications
5.5
7.5
11
15
18.5
22
30
37
45
55
75
Full-load current (A)
15
18
25
35
41
49
66
81
98
119
167
Sectional
area
of
the
power line (m m
2
)
2.5
2.5
4.0
8
10
10
16
25
35
50
70
Sectional
area
of
the
earthing wire (m m
2
)
2.5
2.5
4.0
8
10
10
16
25
25
25
35
Breaker (NFB)
50
50
50
70
100
125
125
125
175
225
300
Note:
(1)
The voltage specifications are 380V and 50/60HZ.
(2)
When the earthing wire and the power line of the movable electric appliance are both
placed in the hose or cable, and the wire diameter of the electric appliance shall be the
same with the power line.
3.7.2 Driving motor
The driving motor of the air compressor shall correctly turn to the counter-clockwise direction when
seeing from the driving end. The inching time of the motor shall be as short as possible while inspecting
the turning of the motor of the air compressor. The button of “emergency shutdown” shall be pressed
promptly after pressing the startup button. If the turning direction of the motor is not correct, the master
switch shall be disconnected and the warning saying “No switching on” shall be locked and hung. Open
the electric cabinet, exchange any two joints (R, S, and T) on the starter, close and screw the electric
cabinet and re-inspect the turning direction of the motor.
3.7.3 Fan motor
Observe whether the fan exhausts air to the external unit, if the turning direction is not correct, the master
switch shall be disconnected and the warning saying “No switching on” shall be locked and hung. Please
exchange any two terminals on the contactor of the fan, close and lock the electric cabinet and inspect
the turning direction.
3.7.4 Control system
