Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Protecting Main Circuit Terminals - YASKAWA AC Drive-A1000 Technical Manual

3.8 Main Circuit Wiring

3.8

Main Circuit Wiring

This section describes the functions, specifications, and procedures required to safely and properly wire the main circuit in
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.
NOTICE: Do not switch the drive input to start or stop the motor. Frequently switching the drive on and off shortens the life of the DC bus
charge circuit and the DC bus capacitors, and can cause premature drive failures. For the full performance life, refrain from switching the
drive on and off more than once every 30 minutes.
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Main Circuit Terminal Functions

Terminal
600 V
Model CIMR-Ao
Class
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
B1
B2
+2
+1
–
+3
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Protecting Main Circuit Terminals

n
Insulation Caps or Sleeves
Use insulation caps or sleeves when wiring the drive with crimp terminals. Take particular care to ensure that the wiring does
not touch nearby terminals or the surrounding case.
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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 (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 devices such as a DC reactor or braking resistor. Do not connect other
nonspecific 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 × wire resistance (Ω/km) × wire length (m) × current (A) × 10
• Refer to instruction manual TOBPC72060000 for braking unit or braking resistor unit wire gauges.
• Use terminal +1 and the negative terminal when connecting a braking transistor, regenerative converter, or a regen unit.
• Refer to UL Standards Compliance on page 498
58
Table 3.1 Main Circuit Terminal Functions
Type
5A0003 to 5A0032
Main circuit power supply input Connects line power to the drive
Drive output
Braking resistor
• DC reactor connection (+1, +2)
(remove the shorting bar
between +1 and +2)
• DC power supply input (+1, –)
Not available
—
Table
for information on UL compliance.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Function
Connects to the motor
Available for connecting a braking resistor or a braking
resistor unit option
For connecting:
• a DC power supply
(terminals +1 and – are not UL approved)
• dynamic braking options
• a DC reactor
Grounding terminal
3.2.
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