Fairford Electronics QFE Series, Manual

Page: 30 / 194

Electrical Installation
QFE
page 2-6
FD8413 issue03_F
2.2 Electrical Connections
2.2.1 Electrical Supplies
The unit requires two AC supplies:-
A 3-phase balanced Mains Supply to provide the power for the controlled
motor.
A single-phase supply:
115V/230V, 50Hz/60Hz, for the internal
control circuitry.
The unit will not operate unless the control supply voltage is within the specified limits.
It is recommended that the control supply is maintained between starts to ensure overload
integrity, as the overload will reset on control supply removal.
2.2.2 Control, Power and Earth Terminations
Control terminations
Cable cross section
AWG mm
2
All models -
Terminals Terminal type Wire type
Min. Max. Min. Max.
Terminal tightening
torque
X1,X2,
S0,S1
11,12,14
21,22,24 Screw clamp
terminals Solid or stranded. 22 14 0.3 2.5 4.4 Ib.in. (0.5 Nm.)
Power and Earth Terminations
Cable cross section Terminal type Conductor type
AWG mm
2
Terminal tightening
torque
Power L1, L2, L3,
T1, T2, T3. M8 metric
threaded studs
Ground PE M8 metric
threaded stud
Use 75°C copper
(CU) conductor only
and the wire shall be
fitted with close
eyelet lug. 1/0 50 106 Ib.in. (12 Nm.)
Cable cross section Terminal type Conductor type
AWG mm
2
Busbar
size (mm)
Terminal tightening
torque
Power L1, L2, L3,
T1, T2, T3. M8 metric
threaded studs
Ground PE M8 metric
threaded stud
Use 75°C copper
(CU) conductor only
and the wire shall be
fitted with close
eyelet lug or use
busbar. 2 x
250MCM
2 x 120 20 x 6 106 Ib.in. (12 Nm.)
Terminal type Conductor type Busbar size (mm) Terminal tightening
torque
Power L1, L2, L3,
T1, T2, T3. Two off M10
nuts and bolts
Ground PE M10 metric
threaded stud
Use Busbar 45 x 20
60 x 10
80 x 10 212 Ib.in. (24 Nm.)
* The conductor sizes indicated in the above table are the maximum allowed by UL for each chassis
size. The actual conductor used must comply with local wiring regulations.
To maintain approvals for cable connections, the Wire Terminals should be UL Listed or Recognised
Wire Connectors and Soldering Lugs, fitted to the wire with specified Crimping Tools as indicated by the
manufacturer.
Size 2: QFE174 to
QFE370 terminals
Size 3: QFE500 to
QFE900 terminals
Size 1: QFE9 to
QFE146 terminals