Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Wire Gauges And Tightening Torque - YASKAWA CIMR-JC4A0002BAA Quick Start 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 Type
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 link choke
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 less 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.
46
Table 3.1 Main Circuit Terminal Functions
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 link choke to this
terminal.
For connecting a DC power supply.
Grounding Terminal
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
http://nicontrols.com
Function
Table 3.2 through
Reference
–
49
–
–
–
49
Table 3.4.
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