Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Wire Gauges And Tightening Torque - YASKAWA T1000A Technical Manual

3.7 Main Circuit Wiring

3.7

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 lifetime 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.
u Main Circuit Terminal Functions
Terminal
200 V
2A0004 to 2A0081
Class
Model
CIMR-T
400 V
4A0002 to 4A0044
Class
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
B1
B2
• DC reactor connection (+1,
+2
+2) (remove the shorting bar
+1
between +1 and +2)
• DC power supply input (+1,
–
–)
+3
Note: For drives that have a built-in braking transistor (models CIMR-T 2A0004 to 2A0138 and 4A0002 to 4A0072), connect the
braking resistor to the B1 terminal and the negative terminal.
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 (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)=
• Refer to instruction manual TOBP C720600 00 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 the +3 terminal and the negative terminal to connect the braking transistor unit. For drives that have a built-in
braking transistor (models CIMR-T 2A0004 to 2A0138 and 4A0002 to 4A0072), connect the braking resistor to the
B1 terminal and the negative terminal.
• Refer to UL Standards Compliance on page 481
54
Table 3.2 Main Circuit Terminal Functions
Type
2A0110 to 2A0138
4A0058, 4A0072
Main circuit power supply input
Drive output
Braking resistor
DC power supply input
(+1, –)
not available
–
× wire resistance (Ω/km) × wire length (m) × motor rated current (A) × 10
3
2A0169 to 2A0415
4A0088 to 4A0362
not available
not available
DC power supply input
(+1, –)
Braking transistor
connection (+3, –)
Table 3.3 through Table
for information on UL compliance.
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Function
Connects line power to the drive
Connects to the motor
Available for connecting a braking resistor or a
braking resistor unit option
For connection
• of the drive to a DC power supply
• of braking options
• connection of a DC reactor
Grounding terminal
3.4.
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