Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Wire Gauges And Tightening Torque - YASKAWA CIMR-JA 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.
u

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 reactor
connection
+2
+1
DC power supply
input
–
Ground
(2 terminals)
u

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 DC reactor or 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
-3
10
• Refer to instruction manual TOBPC72060000 for braking unit or braking resistor unit wire
gauges.
• Refer to UL Standards Compliance on page 236
50 YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
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 to this terminal.
For connecting a DC power supply.
Grounding Terminal
For 200 V class: 100 Ω or less
For 400 V class: 10 Ω or less
Function
Table 3.2 through
for information on UL compliance.
Reference
46
52
65
173
–
52
Table 3.4.