Yaskawa Z1000 AC Drive HVAC - Manual (Page 80)

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.
Refer to Factory Recommended Branch Circuit Protection for UL Compliance on page 247 for details on fuse selection.
u Main Circuit Terminal Functions
Table 3.1 Main Circuit Terminal Functions
Terminal Type
Function Page
Drive Model 5A0003 to 5A0032 5A0041, 5A0052 5A0062 to 5A0242
R/L1
Main circuit power supply input Connects line power to the drive 71 S/L2
T/L3
U/T1
Drive output Connects to the motor 71 V/T2
W/T3
B1
Braking resistor Not available
Available for connecting a braking
resistor or a braking resistor unit option
–
B2
⊕2 • DC link choke
connection
( ⊕1, ⊕2)
(remove the shorting
bar between
⊕1 and ⊕2)
• DC power supply
input
( ⊕1, ⊖)
Not available
For connecting:
• the drive to a DC power supply
• dynamic braking options
• a DC link choke
–
⊕1
DC power supply input
( ⊕1, ⊖)
• DC power supply
input ( ⊕1, ⊖)
• Braking unit
connection ( ⊕3, ⊖)
⊖
⊕3 Not available
10 Ω or less Grounding terminal 84
Note: Use terminals B1 and ⊖ when installing a CDBR-type braking unit on drives with built-in braking transistors (Models 5A0003 to 5A0052).
u 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.
3.8 Main Circuit Wiring
80 YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual