3
nuaire.co.uk
029 2085 8400
30. 04. 19. Leaflet Number 671220
Installation and Maintenance
AXUS Circular Long Cased Axial Flow Fans
4.0 Electrical Wiring
4.1 Single Phase Unit
4.2 Three Phase Units
Single Speed, 1 phase
D.O.L. Starting, 3 phase (3kW and below)
Two Speed - TAP/PAM WOUND MOTOR
D.O.L. Starting (Both Speeds), 3 phase
Example Contactor control - Two Speed Motors, 3 phase
Two Speed - DUAL WOUND MOTOR
D.O.L. Starting (Both Speeds), 3 phase
Single Speed, 3 phase
Speed Control - TRANSFORMER, 3 phase
Speed Control - ELECTRONIC, 3 phase
Star / Delta Starter, 3 phase (4kW and above)
IMPORTANT
If T1/ T2 are located on the fan terminal block, this
is the motor overheat protection device which uses
Thermistors or a Thermostat as specified.
X L N
Fan
Unit
NOTE:
Remove Link between
X+L when using
speed control
L N
230V 1 phase 50Hz supply
220V 1 phase 60Hz supply
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
L1
L2
L3
STAR
L1 - U1
L2 - V1
L3 - W1
Link W2, U2, V2
U1
V1
W1
W2
U2
V2
L1 L2 L3
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
Fan
unit
U1
V1
W1
W2
U2
V2
DELTA
L1 - U1 - W2
L2 - V1 - U2
L3 - W1 - V2
Note:
For all D.O.L. (Direct On Line)
operation or Inverter type Speed Control
wire in DELTA
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
1U
1V
1W
2U
2V
2W
Motor
terminal
box
NOTE
HIGH SPEED
Supply: 2U 2V 2W
LINK: 1U 1V 1W
LOW SPEED
Supply: 1U 1V 1W
Note: individual
wiring instructions
are included with
each unit
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
L1
L2
Low
Speed
High
Speed
L3
L1
L2
L3
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
1U
1V
1W
2U
2V
2W
Motor
terminal
box
AI
A2
E
1 3 5
L1 L2 L3
1U 1V 1W
2U 2V 2W
2 4 6
AI
A2
1 3 5
2 4 6
AI
A2
1 3 5
2 4 6
For low speed connect
Contactor C1
For high speed connect
Contactor C2 and C3
Motor Terminal Box
Note: High Speed -
Supply: 2U 2V 2W
Link: 1U 1V 1W
Low Speed -
Supply: 1U 1V 1W
C1
C2
C3
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
Fan
unit
L3
L2
L1
400V 3 phase 50Hz supply only
L1 L2 L3 N
N L2
U V W
Control 3SPCON
L1 L2 L3
L1
PE/
N/L3
L/L2
W
U
V
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
3 Phase only
INVERTER SPEED CONTROL
Connections
to motor
3 Phase input
Motor
3 Phase
Notes:
Total Length of motor leads should not exceed 50 metres.
If a screened motor cable is used, maximum length should
be 25 metres. Consult our Technical Department if you
wish to use longer leads.
Inverters are configured to suit specific fans and control
applictions as described on the Customer Order
free of charge.
