Main Circuit Wiring; Main Circuit Wiring; Main Circuit Terminal Functions; Wire Gauges And Tightening Torque - YASKAWA L1000V Technical 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
in the drive.
NOTICE: Do not carelessly connect parts or devices to the drives braking transistor terminals. Failure to comply could result in
damage to the drive or braking circuit. Carefully review instruction manual TOBPC72060000 when connecting a braking option to the
drive.
NOTICE: Equipment Hazard. Comply with proper wiring practices. The motor may run in reverse if the phase order is backward,
causing incorrect elevator direction movement. Connect motor input terminals U, V and W to drive output terminals U/T1,V/T2, and W/
T3. The phase order for the drive and motor should match.
NOTICE: Do not solder the ends of wiring 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.
u Main Circuit Terminal Functions
Terminal Description
R/L1
S/L2 Main circuit power supply input
T/L3
U/T1
V/T2 Drive output to motor
W/T3
B1
Braking resistor connection
B2
+1
DC reactor connection
+2
– DC bus negative terminal
Grounding terminals
u Wire Gauges and Tightening Torque
Use the tables in this section to select the appropriate wires and crimp terminals.
Note: 1. Wire gauge recommendations based on drive continuous current ratings using 75°C 600 Vac vinyl-sheathed wire assuming ambient
temperature within 40°C and wiring distance less than 100 m (328 ft.).
2. Terminals B1, B2, +1, and +2 are for connecting a DC reactor, braking resistor or DC power supply. 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 transistor option or braking resistor option wire gauges.
• Use terminal +1 and the negative terminal when connecting a braking transistor option or a regenerative unit.
• Refer to UL Standards Compliance on page 258
Yaskawa recommends using closed-loop crimp terminals on all drive models. Use only the tools recommended by the
terminal manufacturer for crimping. Refer to
loop crimp terminal recommendations.
The wire gauges listed in the following tables are Yaskawa recommendations. Refer to local codes for proper wire gauge
selections.
50
Table 3.1 Main Circuit Terminal Functions
For connection of three-phase AC line power to the drive.
For 200V class drives, rated voltage is 200 to 240 VAC, -15/+10 %
For 400V class drives, rated voltage is 380 to 480 VAC, -15/+10 %
For connection to a three-phase asynchronous induction motor.
For connection to an optional external braking resistor.
For connection of an optional DC bus reactor.
These terminals are shorted at shipment. Remove the shorting jumper between +1 and
+2 when installing a DC reactor.
Allows the drive to be supplied by a DC power supply connected to the +1 and
terminals.
Electrical ground.
× wire resistance (Ω/km) × wire length (m) × current (A) × 10
3
for information on UL compliance.
Closed-Loop Crimp Terminal Size (JIS C 2805) on page 258
YASKAWA EUROPE SIEP
Function
-3
YASKAWA AC Drive L1000V Technical Manual
Reference
42
42
208
210
–
-
53
for closed-