YASKAWA A1000 - Specifications download pdf (Page 12)

3 Electrical Installation

YASKAWA ELECTRIC TOEP C710616 27A YASKAWA AC Drive - A1000 Quick Start Guide 11

• Use a DC reactor or AC reactor on the input side of the drive:

–To suppress harmonic current.

–To improve the power factor on the power supply side.

–When using an advancing capacitor switch.

–With a large capacity power supply transistor (over 600 kVA).

 Wiring the Main Circuit Output

Consider the following precautions for the output circuit wiring.

• Do not connect any other load than a 3 phase motor to the drives output.

• Never connect a power source to the drives output.

• Never short or ground the output terminals.

• Do not use phase correction capacitors.

• If using a contactor between the drive and motor, it should never be operated when the drive is outputting a voltage.

Operating while there is voltage output can cause large peak currents, thus tripping the over current detection or

damage the drive.

 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. Leakage current is caused by the drive. Therefore, if the distance between the ground electrode and the

ground terminal is too long, potential on the ground terminal of the drive will become unstable.

• When using more than one drive, do not to loop the ground wire.

 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-M2, M3-M4, M5-M6, MA, MB, MC (contact output) from wiring to

other control circuit terminals.

• For external control power supply use a UL Listed Class 2 power supply.

• 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.

• If flexible wires with ferrules are connected they might fit tightly into the terminals. To disconnect them, grasp the wire

end with a pair of pliers, release the terminal using a straight-edge screw driver, 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

Function200 V Class

Model

CIMR-A

2A0004 to 2A0081 2A0110 to 2A0138 2A0169 to 2A0211

400 V Class 4A0002 to 4A0044 4A0058 to 4A0072 4A0088 to 4A0165

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

• 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 EU or UL

approved)

• of braking options

• connection of a DC reactor

+1, –

• DC power supply

input

(+1, −)

• DC power supply

input (+1, −)

• Braking transistor

connection (+3, −)

not available

For 200 V class: 100 Ω or less

For 400 V class: 10 Ω or less

Grounding terminal

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 35 36

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YASKAWA A1000 - Specifications Page 12

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