YASKAWA L1000H - Page 13

3 Electrical Installation
YASKAWA Europe TOEP C710616 92D AC Drive L1000H Quick Start Guide EN 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 42 for details.
 Ground Connection
Take the following precautions when grounding the drive:
• Make sure the ground conductor complies with the general technical standards and local regulations.
• Keep ground wires as short as possible.
• Always make sure the ground impedance is conform to the requirements of local safety and installation regulations.
• Never share the ground wire with other devices such as welding machines, etc.
• Do not loop the ground wire when using more than one drive.
 Control Circuit Wiring Precautions
Consider 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
Note: Use terminal B1 and – terminals when installing the braking unit (CDBR type) to the drives with built-in braking transistor (40005
to 40060).
Terminal Type
Function
400 V Class
Model
CIMR-L
40005 to 40039 40045, 40060 40075 to 40150
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
shorting bar between
+1 and +2)
• DC power supply
input (+1, –)
Not available
For connection
• of the drive to a DC power supply
(terminals +1 and – are not UL
approved)
• of dynamic braking options
+1, –
DC power supply input
(+1, –)
• DC power supply
input (+1, –)
• Braking unit
connection (+3, –)
+3
– Grounding terminal