3.8 Main Circuit Wiring
76 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Protecting Main Circuit Terminals
Insulation Cap
Use insulation caps when wiring the drive with crimp terminals. Take particular care to ensure that wiring does not touch
neighboring terminals or the surrounding case.
Insulation Barrier
Insulation barriers are packaged with drive models CIMR-A4A0414 through 4A1200 to provide added protection
between terminals. YASKAWA recommends using the insulation barriers provided to ensure proper wiring. See
Figure 3.19 for instructions on where the insulation barrie
rs should be placed.
Figure 3.22
Figure 3.19 Installing insulation barriers
Wire Gauges and Tightening Torque
Select the appropriate wires and crimp terminals from Table 3.4 through Table 3.5.
Note: 1. Wire gauge recommendations based on drive continuous current ratings (ND) using 75°C 600 Vac vinyl-sheathed wire assuming
ambient temperature within 40°C and wiring distance less than 100 m.
2. T
erminals +1, +2, +3, –, B1 and B2 are for connecting optional power devices. Use caution to connect only approved devices to the
correct terminal(s).
• Consider the amount of voltage drop when selecting wire gauges. Increase the wire gauge when the voltage drop is
greater than 2% of motor rated voltage. Ensure the wire gauge is suitable for the terminal block. Use the following
formula to calculate the amount of voltage drop:
Line drop voltage (V) = w
ire resistance (/km) wire length (m) motor rated current (A) 10
-3
• Refer to instruction manual TOBP C720600 00 or TOBP C720600 01 for braking unit or braking resistor unit wire
gauges.
• Use terminal +1 and the negative te
rminal when connecting a regenerative converter, or a regen unit.
• Use terminal B1 and - when installing the braking unit to the
drives with built-in braking transistor (2A0004 to
2A0138, 4A0002 to 4A0072).
NOTICE: Do not connect a braking resistor to terminals +1 and -. Failure to comply may cause damage to the drive circuitry.
• Refer to UL Standards Compliance on page 586 for information on UL compliance.
YASKAWA recommends using closed-loop crimp terminals on all drive models.
UL/cUL approval requires the use of
closed-loop crimp terminals when wiring the drive main circuit terminals on models CIMR-A2A0110 to 2A0415 and
4A00
58 to 4A1200. Use only the tools recommended by the terminal manufacturer for crimping. Refer to Closed-Loop
Crimp Terminal Size on page 591 for closed-loop crimp terminal recommendations.
The wire gauges listed in the following ta
bles are YASKAWA recommendations. Refer to local codes for proper wire
gauge selections.
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