Protecting Main Circuit Terminals - YASKAWA A1000 Technical Manual

3.8 Main Circuit Wiring
 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-A4A0414 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 barriers should be placed.
Figure 3.22
Insulation Barrier
 Wire Gauges and Tightening Torque
Select the appropriate wires and crimp terminals from
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. Terminals +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) =
• 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 terminal 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
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-A2A0110 to 2A0415 and
4A0058 to 4A1200. Use only the tools recommended by the terminal manufacturer for crimping. Refer to
Crimp Terminal Size on page 591
The wire gauges listed in the following tables are YASKAWA recommendations. Refer to local codes for proper wire
gauge selections.
76
Figure 3.19 Installing insulation barriers
 wire resistance (/km)  wire length (m)  motor rated current (A)  10
3
for information on UL compliance.
for closed-loop crimp terminal recommendations.
Table 3.4 through Table
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
3.5.
-3
Closed-Loop