YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
37
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
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 10 mm
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 4H12
• 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 you select 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 ter3 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 ter1 and - to connect a regenerative converter or regenerative unit.
WARNING
Fire Hazard. Do not connect a braking resistor to ter1 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.
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
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 10 mm
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 4H12
• T414 to T720
If you do not obey the standards and regulations, it can cause serious injury or death.
Refer to
Three-Phase 200 V Class on page 38
Three-Phase 400 V Class on page 42
, and
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) maximum
–
Wiring distance: 100 m (328 ft) maximum
–
Normal Duty rated current value
•
Use ter1, +2, +3, -, B1, and B2 to connect a peripheral option such as a DC link choke or a braking resistor. Do not connect other
items to these terminals.
•
Refer to the instruction manual for each device for recommended wire gauges to connect peripheral devices or options to ter1, +2,
+3, -, B1, and B2. 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.