YASKAWA GA800

Electrical Installation
3
3.3 Main Circuit Wiring
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 97
Model Terminal
Recomm. Gauge
AWG, kcmil
Applicable Gauge
AWG, kcmil
(mm
2
)
Wire
Stripping
Length
*1
mm
Terminal Screw
Size and Shape
Tightening Torque
N∙m (lbf∙in)
T605
R/L1, S/L2, T/L3
R1/L11, S1/L21, T1/L31
4/0 × 2P (× 2)
3/0 - 300
(95 - 150)
- M12
35
(310)
U/T1, V/T2, W/T3 300 × 4P
250 - 300
(120 - 150)
- M12
35
(310)
-, +3 4/0 × 4P
2 - 250
(35 - 120)
- M12
35
(310)
2/0
2/0 - 300
(70 - 150)
- M12
32 - 40
(283 - 354)
T720
R/L1, S/L2, T/L3
R1/L11, S1/L21, T1/L31
250 × 2P (× 2)
3/0 - 300
(95 - 150)
- M12
35
(310)
U/T1, V/T2, W/T3 300 × 4P
250 - 300
(120 - 150)
- M12
35
(310)
-, +3 4/0 × 4P
2 - 250
(35 - 120)
- M12
35
(310)
2/0
2/0 - 300
(70 - 150)
- M12
32 - 40
(283 - 354)
*1 Remove insulation from the ends of wires to expose the length of wire shown.
◆ Main Circuit Terminal and Motor Wiring
This section outlines the various steps, precautions, and checkpoints for wiring the main circuit terminals and motor
terminals.
WARNING! Fire Hazard. Do not connect main power supply wiring to drive motor terminals U/T1, V/T2, and W/T3. Connect main
power supply wiring to main circuit input terminals R/L1, S/L2, and T/L3. Incorrect wiring can cause serious injury or death from fire.
WARNING! Sudden Movement Hazard. Make sure that you align the phase order for the drive and motor when you connect the
motor to drive output terminals U/T1, V/T2, and W/T3. If the phase order is incorrect, it can cause the motor to run in reverse. If the
motor accidentally runs in reverse, it can cause serious injury or death.
NOTICE: Do not connect phase-advancing capacitors, LC/RC noise filters, or leakage breakers (GFCI) to the motor circuit. If you
connect these devices to the output circuits, it can cause damage to the drive and connected equipment.
■ Cable Length Between Drive and Motor
When the wiring between the drive and the motor is too long, voltage drop along the motor cable can decrease motor
torque, usually at low frequency output. If you connect motors in parallel with long motor cable, this is also a
problem. Drive output current increases when the leakage current from the cable increases. An increase in leakage
current can cause overcurrent and decrease the precision of the current detection.
Use the values in Table 3.4 to adjust the drive carrier frequency. For systems that have 100 m (328 ft) or longer motor
wiring, if you use metal conduits or isolated cables for each phase, it will increase stray capacitance.
Table 3.4 Carrier Frequency against Cable Length Between Drive and Motor
Wiring Distance Between the Drive
and Motor
50 m (164 ft) Maximum 100 m (328 ft) Maximum More than 100 m (328 ft)
Carrier Frequency 15 kHz or less 5 kHz or less 2 kHz or less
Note:
• To set the carrier frequency in a drive that is operating more than one motor, calculate the cable length as the total distance of wiring to all
connected motors.
• When A1-02 = 5, 6 [OLV/PM, AOLV/PM], the maximum cable length is 100 m (328 ft).
• When you connect to a PM motor, it can be necessary to adjust the overcurrent detection. Refer to L8-27: Overcurrent Detection Gain on
page 1002 for more information.
■ Ground Wiring
Follow the precautions to wire the ground for one drive or a series of drives.