YASKAWA
TOEPC71061782C GA800 Drive Installation & Primary Operation
25
◆
Main Circuit Terminal Block Wiring
■
Wire Selection
Use this section to select the correct wires for main circuit wiring.
Wire Selection Precautions
WARNING
Electrical Shock Hazard.
Make sure that the protective ground wire complies with technical standards and local safety regulations. The IEC/EN 61800-5-
1:2007 standard specifies that you must wire the power supply to automatically de-energize when the protective ground wire
disconnects. You can also connect a protective ground wire that has a minimum cross-sectional area of 10mm
2
(copper wire) or 16
mm
2
(aluminum wire). The leakage current of the drive will be more than 3.5 mA in drive models;
• T414 - T720
If you do not obey the standards and regulations, it can cause serious injury or death.
Think about line voltage drop before selecting wire gauges. Select wire gauges that drop the voltage by 2% or less of
the rated voltage. Increase the wire gauge and the cable length when the risk of voltage drops increases. Calculate line
voltage drop with this formula:
Line voltage drop (V) =
× wire resistance (Ω/km) × wiring distance (m) × motor rated current (A) × 10
-3
.
Precautions during Wiring
•
Use terminals - and +3 to connect braking units to drives.
•
Refer to
“
Yaskawa AC Drive Option Braking Unit, Braking Resistor Unit Instruction Manual (TOBPC72060001)
”
for information about wire gauges and tightening torques to connect braking resistor units or braking units.
WARNING
Fire Hazard. Use terminals - and +3 for the braking resistor connections. If you connect a braking resistor to the
incorrect terminals, it can cause damage to the drive and braking circuit and serious injury or death.
Wire Gauge and Torque Specifications for UL Listing
WARNING
Electrical Shock Hazard.
Make sure that the protective ground wire complies with technical standards and local safety regulations. The IEC/EN 61800-5-
1:2007 standard specifies that you must wire the power supply to automatically de-energize when the protective ground wire
disconnects. You can also connect a protective ground wire that has a minimum cross-sectional area of 10mm
2
(copper wire) or 16
mm
2
(aluminum wire). The leakage current of the drive will be more than 3.5 mA in drive models;
• T414 - T720
If you do not obey the standards and regulations, it can cause serious injury or death.
Refer to
6-Phase/12-Pulse 400 V Class on page 26
for the recommended wire gauges and tightening torques of the
main circuit terminals.
Note:
•
The recommended wire gauges are based on drive continuous current ratings with 75 °C (167 °F) 600 V class 2 heat-resistant indoor PVC
wire. Assume these conditions:
–
Ambient temperature: 40 °C (104 °F) or lower
–
Wiring distance: 100 m (328 ft) or shorter
–
Normal Duty Rated current value
•
Use terminals - and +3 to connect a braking resistor. Contact Yaskawa or your nearest sales representative if the recommended wire gauges
for the peripheral devices or options are out of the range of the applicable gauges for the drive.
•
The metric wire gauge values are provided as reference information from equivalent AWG sizes and not exactly the same sizes as the
AWG/kcmil values. Obey local safety regulations for wire sizes and make sure that the ferrule or crimp terminals are correct for your size.
