Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Wire Gauges And Tightening Torque - YASKAWA CIMR-JB Series Installation & Start-Up Manual

3.6 Main Circuit Wiring

3.6

Main Circuit Wiring

This section describes the functions, specifications, and procedures required to safely and
properly wire the main circuit of the drive.
NOTICE: Do not solder the ends of wire connections to the drive. Soldered wiring connections can loosen
over time. Improper wiring practices could result in drive malfunction due to loose terminal connections.
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Main Circuit Terminal Functions

Terminal
R/L1
Main circuit power
S/L2
supply input
T/L3
U/T1
V/T2 Drive output
W/T3
B1
Braking resistor
B2
⊕1
DC reactor
connection
⊕2
⊕1
DC power supply
input
⊖
Ground
(2 terminals)
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Wire Gauges and Tightening Torque

Select the appropriate wires and crimp terminals from
Note: 1. Wire gauge recommendations based on drive continuous current ratings using 75 °C 600 Vac vinyl-
sheathed wire assuming ambient temperature within 30 °C and wiring distance shorter than 100 m.
2. Terminals ⊕1, ⊕2, ⊖, B1 and B2 are for connecting optional devices such as a braking resistor. Do
not connect other non-specified devices to these terminals.
• 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) = 3 x wire resistance (Ω/km) x wire length (m) x current (A) x 10
• Refer to instruction manual TOBP C720600 00 for braking unit or braking resistor unit
wire gauges.
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Table 3.1 Main Circuit Terminal Functions
Type
Connects line power to the drive.
Drives with single-phase 200 V input power use terminals R/
L1 and S/L2 only.
T/L3 must not be used.
Connects to the motor.
Available for connecting a braking resistor or the braking
resistor unit option.
These terminals are shorted at shipment. Remove the shorting
bar between ⊕1 and ⊕2 when connecting a DC reactor to this
terminal.
For connecting a DC power supply.
Grounding Terminal
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
Function
Table 3.2 through
Reference
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54
–
–
–
55
Table 3.4.
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