YASKAWA GA800

3.3 Main Circuit Wiring
84 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Table 3.3 Main Circuit Terminal Functions (6-Phase/12-Pulse Drives)
Terminal Name
Function
Model T103 - T720
R/L1, R1/L11
Main circuit power supply input To connect a commercial power supply.S/L2, S1/L21
T/L3, T1/L31
U/T1
Drive output To connect a motor.V/T2
W/T3
-
Braking unit connection To connect a braking resistor unit (option).
+3
C class grounding (ground to 10 Ω or less) To ground the drive.
◆ Wire Selection
Select the correct wires for main circuit wiring.
Refer to Main Circuit Wire Gauges and Tightening Torques on page 243 for wire gauges and tightening torques as
specified by European standards.
Refer to Wire Gauge and Torque Specifications for UL Listing on page 85 for wire gauges and tightening torques as
specified by UL standards.
■ 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;
• 2xxxB
• 2xxxC
• 4002B to 4371B
• 4002C to 4371C (with built-in EMC filter turned ON)
• 4414 to 4720
• T414 to 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 B1 and - to connect braking units to drives that have built-in braking transistors (models 2004 to
2138 and 4002 to 4168). Use terminals +3 and - to connect braking units to drives that do not have built-in braking
transistors.
• 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.
• Use terminals +1 and - to connect a regenerative converter or regenerative unit.
WARNING! Fire Hazard. Do not connect a braking resistor to terminals +1 or -. Use terminals B1 and B2 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.