Fairford Electronics QFE Series, Manual

Page: 5 / 194

3 M-8588-F 110620
2 Wiring Diagrams
Use the control circuit with one of these power circuits
Note 1: Correction capacitors:
Power factor correction capacitors must NOT be positioned on the output of the power circuit.
Note 2: Fuse Selection:
Where semiconductor type fuses are required, they should be selected from the table in Section 5.
Note 3: The in-line configuration shown in Fig 2.3 requires that the firing mode be set to ‘0’.
Note 4: The In-Delta configuration as in Fig 2.4 requires that the Firing Mode be set to ‘1’.
An in-line contactor controlled by the starter MUST be used with the In-Delta firing mode.
Note 5: The bypass configuration as in Fig 2.5 is automatically detected as “Auto bypass” is set as default.
Note
Contactor K3 is required for the 'Op-
eration in Bypass Power Circuit'
and is controlled by the program-
mable relay set as a 'Top of Ramp'
relay.
The Electronic control card is located underneath
the cover in the Size 1 and 2 units and inside the hinged
door panel in Size 3 units. Connections shown in the
control circuit wiring diagram are made to the elec-
tronic control card terminals as shown in fig.2.2 below.
Programmable output,
Changeover contacts
Default: - Run Relay
Programmable output,
Changeover contacts
Default: Ramp
Complete
Programmable Input,
Control Input 1.
Default: Start/Stop
D5
J8
J9 J10
Relay
22 24 21 12 14 11 S0 S1
Micro-
controller
Relay
D5 (Green)
indicates the presence
of the control supply.
Fig 2.2
Fig 2.1 Control circuit wiring
Control
Supply
Emergency
Stop
STOP
START
K2.1
K2
K1
K2.2
Electronic
control
card
S0, 00
S1
X2
X1
24
21
14
11
K3
Control
supply
card
Note: Extra X1 and X2 on Size 3 for fan supply
For this
configuration,
applying the
equation,
I
e
(QFE)
allows lower current
rating QFE than
the motor.
Fig 2.3 Power circuit for
In-Line connection of
motors (see note 3).
Induction
Motor
1
L1
3
L2
5
L3
2
T1
4
T2
6
T3
EARTH
(Electrical
Ground)
Isolation and Protection
Switch-gear
(provided by the customer)
K1
Feeder
cables
Mains
Supply
Busbar
L1
L2
L3
Circuit
Contactor
Fig 2.4 Power circuit for In-Delta
connection of motors (see note 4).
Induction
Motor
U1
V1
V2
W2
W1
U2
In-delta connections for
correct rotation of motor
Terml Fwd Rev
T1
T2
T3
L1
L2
L3
W1
V1
U1
V2
U2
W2
V1
W1
U1
W2
U2
V2
EARTH
(Electrical
Ground)
Isolation and Protection
Switch-gear
(provided by the customer)
Feeder cables
Mains
Supply
Busbar
L1
L2
L3
Circuit
Contactor
K1
1
L1
3
L2
5
L3
2
T1
4
T2
6
T3
Fig 2.5 Power circuit for bypass
operation (see note 5).
Bypass
Contactor
Induction
Motor
EARTH
(Electrical
Ground)
Isolation and Protection
Switch-gear
(provided by the customer)
Feeder cables
Mains
Supply
Busbar
L1
L2
L3
Circuit
Contactor
K1
1
L1
3
L2
5
L3
2
T1
4
T2
6
T3
K3