3 Electrical Installation
YASKAWA ELECTRIC
TOEP C710616 33A YASKAWA AC Drive L1000A Quick Start Guide
13
Wiring the Main Circuit Output
Note the following precautions for the output circuit wiring:
• Do not connect any load other than a three-phase motor to the output side of the drive.
• Never connect a power source to the drive output.
• Never short or ground the output terminals.
• Do not use phase correction capacitors.
• Check the control sequence to make sure that the motor contactor is not turned ON or OFF during drive operation.
Turning on the motor contactor while voltage is output causes an inrush current that is likely to trigger the drive’s
overcurrent protection.
Note:
The drive provides a Safe Disable function that can be utilized to reduce the number of motor contactors to one. Refer to
Safe
Disable Input Function on page 41
for details.
Ground Connection
Take the following precautions when grounding the drive:
• Never share the ground wire with other devices such as welding machines, etc.
• Always use a ground wire that complies with electrical equipment technical standards. Keep ground wires as short as
possible. Because leakage current is caused by the drive, potential on the ground terminal of the drive will become
unstable if the distance between the ground electrode and the ground terminal is too long.
• Always make sure the ground impedance is conform to the requirements of local safety and installation regulations.
• Do not loop the ground wire when using more than one drive.
Control Circuit Wiring Precautions
Note the following precautions for wiring the control circuits:
• Separate control circuit wiring from main circuit wiring and other high-power lines.
• Separate wiring for control circuit terminals M1 to M6, MA, MB, and MC (contact output) from wiring to other control
circuit terminals.
• Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.
• Ground the cable shields with the maximum contact area of the shield and ground.
• Cable shields should be grounded on both cable ends.
• Note that flexible wires with ferrules may fit tightly into the terminals. To disconnect them, grasp the wire end with a
pair of pliers, release the terminal using a straight-edge screwdriver, turn the wire for about 45
°,
and pull it gently out
of the terminal. For details, refer to the Technical Manual. Use this procedure for removing the wire link between HC,
H1, and H2 when the Safe Disable function is utilized.
Main Circuit Terminals
Terminal
Type
Function
200 V Class
Model
CIMR-LC
2A0018 to 2A0075
2A0085, 2A0115
2A0145, 2A0180
400 V Class
4A0009 to 4A0039
4A0045, 4A0060
4A0075 to 4A0150
R/L1, S/L2, T/L3
Main circuit power supply input
Connects line power to the drive
U/T1
,
V/T2
,
W/T3
Drive output
Connects to the motor
B1, B2
Braking resistor
Not available
Available for connecting a braking
resistor or a braking resistor unit option
+2
• DC reactor connection
(+1, +2). Remove the
jumper b1
and +2
• DC power supply
input (+1,
−
)
Not available
For connecting
• the drive to a DC power supply
(ter1 and – are not EU or UL
approved)
• braking options
• a DC reactor
+1, –
• DC power supply
input (+1,
−
)
• DC power supply
input (+1,
−
)
• Braking transistor
connection (+3,
−
)
+3
Not available
–
Grounding terminal
PDF compression, OCR, web optimization using a watermarked evaluation copy of CVISION PDFCompressor
