01. 09. 21. Document Number 671711
4
Nuaire |
Western Industrial Estate
|
Caerphilly
|
CF83 1NA
|
nuaire.co.uk
SVTC8
Installation Manual
6.1.3 Two Speed - Dual Wound Motor - 3 Phase
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
/ Isolator
6
Wiring - Two Speed - Dual Wound Motor - 3 Phase
6.1.4 Two Speed - TAP / PAM Wound Motor - 3 Phase
1U
1V
1W
2U
2V
2W
NOTE
HIGH SPEED
Supply: 2U 2V 2W
LINK: 1U 1V 1W
LOW SPEED
Supply: 1U 1V 1W
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
Motor Terminal Box
/ Isolator
7
Wiring - Two Speed - TAP / PAM Wound Motor - 3 Phase
6.1.5 Two Speed Motors - Example Contactor Control
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
8
Two Speed Motors - Example Contactor Control
6.0 ELECTRICAL INSTALLATION
Motors are totally enclosed and protected to IP55 (Dust and low
pressure water jets). Motors comply with BS5000, EN600034 and
IEC34-1. Enclosures are to IP55 with class H insulation. Motors are
tested in accordance with EN12101-3 2015.
Note the requirements for maintenance of the motor. Failure to
comply with the recommendations will invalidate any warranty
claim.
For good EMC engineering practice, any sensor cables or switched
live cables should not be placed within 50mm of other cables or on
the same metal cable tray as other cables.
6.1 Wiring
Electrical supply wiring connection is to an externally mounted isolator
box on the case exterior. The box is pre-wired to the motor with heat
resisting cable.
Total length of motor leads should not exceed 30 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 applications as described on
the Customer Order free of charge.
Individual wiring instruction are included with each unit.
Under fire conditions the electrical supply must not run through
the inverter (the inverter must be bypassed).
6.1.1 Star D.O.L. Starting (3kW and below) - 3 Phase
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
4
Wiring - Star D.O.L. Starting (3kW and below) - 3 Phase
6.1.2 Delta D.O.L. Starting (4kW and above) - 3 Phase
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
5
Wiring - Delta D.O.L. Starting (4kW and above) - 3 Phase
